View W681513SG_5013189.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

W681513
5V SINGLE-CHANNEL VOICEBAND CODEC FOR USB APPLICATIONS
Data Sheet
-1-
Publication Release Date: October, 2005 Revision A11
W681513
1. GENERAL DESCRIPTION
The W681513 is a single channel PCM CODEC with pin-selectable -Law or A-Law companding dedicated to the USB accessory market by supporting a derivative 2MHz clock. The device is compliant with the ITU G.712 specification. It operates from a single +5V power supply and is available in 20-pin SOP package option. Functions performed include digitization and reconstruction of voice signals, and band limiting and smoothing filters required for PCM systems. The filters are compliant with ITU G.712 specification. W681513 performance is specified over the industrial temperature range of -40C to +85C. The W681513 includes an on-chip precision voltage reference and an additional power amplifier, capable of driving 300 loads differentially up to a level of 6.3V peak-to-peak. The analog section is fully differential, reducing noise and improving the power supply rejection ratio. The data transfer protocol supports both long-frame and short-frame synchronous communications for PCM applications, and IDL and GCI communications for ISDN applications. W681513 accepts 2MHz master clock rate, and an on-chip pre-scaler automatically determines the division ratio for the required internal clock.
2. FEATURES
* * * * * * * * * * * Single +5V power supply Typical power dissipation of 30 mW, power-down mode of 0.5 W Fully-differential analog circuit design On-chip precision reference of 1.575 V for a 0 dBm TLP at 600 (775mVRMS) Push-pull power amplifiers with external gain adjustment with 300 load capability Master clock rate supports 2.000MHz clock for USB applications Pin-selectable -Law and A-Law companding (compliant with ITU G.711) CODEC A/D and D/A filtering compliant with ITU G.712 Industrial temperature range (-40C to +85C) Package: 20-pin SOP (SOG) Pb-Free / RoHS package option available
Applications
* Soft phones running on a PC (VoInternet): o o * * USB Phones USB to PSTN Gateway
USB Microphones USB Headset for PC and Game Consoles
-2-
W681513
3. BLOCK DIAGRAM
Receive PCM Interface
BCLKR FSR PCMR BCLKT FST PCMT
Re Int PC cei erf M ve ace Transmit PCM Interface Tra Int ns PC erf mitM ace G.712 CODEC G.711 /A -Law
PAO+ PAOPAI RO+ RO AO AI+ AI-
/A-Law
512 kHz 256 kHz MCLK
2000 kHz,
Pre -Scaler -scaler
8 kHz
Voltage reference
V AG
Power Conditioning
VDD
PUI
VSS
-3-
Publication Release Date: October, 2005 Revision A11
W681513
4. TABLE OF CONTENTS
1. GENERAL DESCRIPTION.................................................................................................................. 2 2. FEATURES ......................................................................................................................................... 2 3. BLOCK DIAGRAM .............................................................................................................................. 3 4. TABLE OF CONTENTS ...................................................................................................................... 4 5. PIN CONFIGURATION ....................................................................................................................... 6 6. PIN DESCRIPTION ............................................................................................................................. 7 7. FUNCTIONAL DESCRIPTION............................................................................................................ 8 7.1. Transmit Path ................................................................................................................................ 8 7.2. Receive Path ................................................................................................................................. 9 7.3. Power Management..................................................................................................................... 10 7.3.1. Analog and Digital Supply ..................................................................................................... 10 7.3.2. Analog Ground Reference Voltage Outpt ............................................................................. 10 7.4. PCM Interface .............................................................................................................................. 10 7.4.1. Long Frame Sync.................................................................................................................. 10 7.4.2. Short Frame Sync ................................................................................................................. 11 7.4.3. General Circuit Interface (GCI) ............................................................................................. 11 7.4.4. Interchip Digital Link (IDL)..................................................................................................... 12 7.4.5. System Timing ...................................................................................................................... 12 8. TIMING DIAGRAMS.......................................................................................................................... 13 9. ABSOLUTE MAXIMUM RATIINGS................................................................................................... 20 9.1. Absolute Maximum Ratings ......................................................................................................... 20 9.2. Operating Conditions ................................................................................................................... 20 10. ELECTRICAL CHARACTERISTICS ............................................................................................... 21 10.1. General Parameters .................................................................................................................. 21 10.2. Analog Signal Level and Gain Parameters ............................................................................... 22 10.3. Analog Distortion and Noise Parameters .................................................................................. 23 10.4. Analog Input and Output Amplifier Parameters......................................................................... 24 10.5. Digital I/O ................................................................................................................................... 26 10.5.1. -Law Encode Decode Characteristics............................................................................... 26 10.5.2. A-Law Encode Decode Characteristics .............................................................................. 27 10.5.3. PCM Codes for Zero and Full Scale ................................................................................... 28 10.5.4. PCM Codes for 0dBm0 Output ........................................................................................... 28 11. TYPICAL APPLICATION CIRCUITS .............................................................................................. 29 12. PACKAGE SPECIFICATION .......................................................................................................... 32 12.2. 20L SOP (SOG)-300mil ............................................................................................................. 32 -4-
W681513
13. ORDERING INFORMATION........................................................................................................... 33 14. VERSION HISTORY ....................................................................................................................... 34
-5-
Publication Release Date: October, 2005 Revision A11
W681513
5. PIN CONFIGURATION
RO+ RO+ PAI PAOPAO+ VDD FSR PCMR BCLKR PUI
1 2 3 4 5 6 7 8 9 10
20 19 18 17
SINGLE CHANNEL CODEC
16 15 14 13 12 11
VAG AI+ AIAO /A-Law /A VSS FST PCMT BCLKT MCLK
SOP
-6-
W681513
6. PIN DESCRIPTION
Pin Name RO+ RO+ PAI PAOPAO+ VDD FSR Pin No. 1 2 3 4 5 6 7 Functionality Non-inverting output of the receive smoothing filter. This pin can typically drive a 2 k load to 1.575 volt peak referenced to the analog ground level. Non-inverting output of the receive smoothing filter. This pin can typically drive a 2 k load to 1.575 volt peak referenced to the analog ground level. This pin is the inverting input to the power amplifier. Its DC level is at the VAG voltage. Inverting power amplifier output. This pin can drive a 300 load to 1.575 volt peak referenced to the VAG voltage level. Non-inverting power amplifier output. This pin can drive a 300 load to 1.575 volt peak referenced to the VAG voltage level. Power supply. This pin should be decoupled to VSS with a 0.1F ceramic capacitor. 8 kHz Frame Sync input for the PCM receive section. This pin also selects channel 0 or channel 1 in the GCI and IDL modes. It can also be connected to the FST pin when transmit and receive are synchronous operations. PCM input data receive pin. The data needs to be synchronous with the FSR and BCLKR pins. PCM receive bit clock input pin. This pin also selects the interface mode. The GCI mode is selected when this pin is tied to VSS. The IDL mode is selected when this pin is tied to VDD. This pin can also be tied to the BCLKT when transmit and receive are synchronous operations. Power up input signal. When this pin is tied to VDD, the part is powered up. When tied to VSS, the part is powered down. System master clock input supporting 2000 kHz only. PCM transmit bit clock input pin. PCM output data transmit pin. The output data is synchronous with the FST and BCLKT pins. 8 kHz transmit frame sync input. This pin synchronizes the transmit data bytes. This is the supply ground. This pin should be connected to 0V. Compander mode select pin. -Law companding is selected when this pin is tied to VDD. A-Law companding is selected when this pin is tied to VSS. Analog output of the first gain stage in the transmit path. Inverting input of the first gain stage in the transmit path. Non-inverting input of the first gain stage in the transmit path. Mid-Supply analog ground pin, which supplies a 2.5 Volt reference voltage for all-analog signal processing. This pin should be decoupled to VSS with a 0.01F to 0.1 F capacitor. This pin becomes high impedance when the chip is powered down.
PCMR BCLKR
8 9
PUI MCLK BCLKT PCMT FST VSS /A-Law AO AIAI+ VAG
10 11 12 13 14 15 16 17 18 19 20
-7-
Publication Release Date: October, 2005 Revision A11
W681513
7. FUNCTIONAL DESCRIPTION
W681513 is a single-rail, single channel PCM CODEC for voiceband applications. The CODEC complies with the specifications of the ITU-T G.712 recommendation. The CODEC also includes a complete -Law and A-Law compander. The -Law and A-Law companders are designed to comply with the specifications of the ITU-T G.711 recommendation. The block diagram in section 3 shows the main components of the W681513. The chip consists of a PCM interface, which can process long and short frame sync formats, as well as GCI and IDL formats. The pre-scaler of the chip provides the internal clock signals and synchronizes the CODEC sample rate with the external frame sync frequency. The power conditioning block provides the internal power supply for the digital and the analog section, while the voltage reference block provides a precision analog ground voltage for the analog signal processing. The main CODEC block diagram is shown in section 3.
VA V AG G
++
PAO+ PAO PAI
Receive Path
8 D/A Converter w fC= 3400Hz Hz Smoothi Smoothing Filter ng 1 Smoothing Smoothi Filter ng 2 + -
RO +
/A-Contr Control ol
Transmit Path
AO 8 /A- /A Control Contr A/D Converter fC = 200Hz fC = 200 Hz High Pass High Filte Filter Pas fC= 3400Hz = 3400 Hz Ant - Aliasing Ant -Aliasi i Filter ng Ant -Aliasi -Aliasing Filter + + AI+ AI -
Figure 7.1 The W681513 Signal Path
7.1. Transmit Path
The A-to-D path of the CODEC contains an analog input amplifier with externally configurable gain setting (see application examples in section 11). The device has an input operational amplifier whose output is the input to the encoder section. If the input amplifier is not required for operation it can be powered down and bypassed. In that case a single ended input signal can be applied to the AO pin or the AI- pin. The AO pin becomes high input impedance when the input amplifier is powered down. The input amplifier can be powered down by connecting the AI+ pin to VDD or VSS. The AO pin is selected
-8-
W681513
as an input when AI+ is tied to VDD and the AI- pin is selected as an input when AI+ is tied to VSS (see Table 7.1). AI+ VDD 1.2 to VDD-1.2 VSS Input Amplifier Powered Down Powered Up Powered Down Input AO AI+, AIAI-
Table 7.1 Input Amplifier Modes of operation
When the input amplifier is powered down, the input signal at AO or AI- needs to be referenced to the analog ground voltage VAG. The output of the input amplifier is fed through a low-pass filter to prevent aliasing at the switched capacitor 3.4 kHz low pass filter. The 3.4 kHz switched capacitor low pass filter prevents aliasing of input signals above 4 kHz, due to the sampling at 8 kHz. The output of the 3.4 kHz low pass filter is filtered by a high pass filter with a 200 Hz cut-off frequency. The filters are designed according to the recommendations in the G.712 ITU-T specification. From the output of the high pass filter the signal is digitized. The signal is converted into a compressed 8-bit digital representation with either -Law or ALaw format. The -Law or A-Law format is pin-selectable through the /A-Law pin. The compression format can be selected according to Table 7.2.
/A-Law Pin VSS VDD
Table 7.2.
Format A-Law -Law
Pin-selectable Compression Format
The digital 8-bit -Law or A-Law samples are fed to the PCM interface for serial transmission at the sample rate supplied by the external frame sync FST.
7.2. Receive Path
The 8-bit digital input samples for the D-to-A path are serially shifted in by the PCM interface and converted to parallel data bits. During every cycle of the frame sync FSR, the parallel data bits are fed through the pin-selectable -Law or A-Law expander and converted to analog samples. The mode of expansion is selected by the /A-Law pin as shown in Table 7.2. The analog samples are filtered by a low-pass smoothing filter with a 3.4 kHz cut-off frequency, according to the ITU-T G.712 specification. A sin(x)/x compensation is integrated with the low pass smoothing filter. The output of this filter is buffered to provide the receive output signal RO+. The RO+ output can be externally connected to the PAI pin to provide a differential output with high driving capability at the PAO+ and PAO- pins. By using external resistors (see section 11 for examples), various gain settings of this output amplifier Publication Release Date: October, 2005 Revision A11
-9-
W681513
can be achieved. If the transmit power amplifier is not in use, it can be powered down by connecting PAI to VDD.
7.3. POWER MANAGEMENT
7.3.1. Analog and Digital Supply
The power supply for the analog and digital parts of the W681513 must be 5V +/- 10%. This supply voltage is connected to the VDD pin. The VDD pin needs to be decoupled to ground through a 0.1 F ceramic capacitor.
7.3.2. Analog Ground Reference Voltage Output
The analog ground reference voltage is available for external reference at the VAG pin. This voltage needs to be decoupled to VSS through a 0.01 F ceramic capacitor.
7.4. PCM INTERFACE
The PCM interface is controlled by pins BCLKR, FSR, BCLKT & FST. The input data is received through the PCMR pin and the output data is transmitted through the PCMT pin. The modes of operation of the interface are shown in Table 7.3.
BCLKR 2.000 MHz VSS VSS VDD VDD
FSR 8 kHz VSS VDD VSS VDD
Interface Mode Long or Short Frame Sync ISDN GCI with active channel B1 ISDN GCI with active channel B2 ISDN IDL with active channel B1 ISDN IDL with active channel B2
Table 7.3 PCM Interface mode selections
7.4.1. Long Frame Sync
The Long Frame Sync or Short Frame Sync interface mode can be selected by connecting the BCLKR or BCLKT pin to a 2.000 MHz clock and connecting the FSR or FST pin to the 8 kHz frame sync. The device synchronizes the data word for the PCM interface and the CODEC sample rate on the positive edge of the Frame Sync signal. It recognizes a Long Frame Sync when the FST pin is
- 10 -
W681513
held HIGH for two consecutive falling edges of the bit-clock at the BCLKT pin. The length of the Frame Sync pulse can vary from frame to frame, as long as the positive frame sync edge occurs every 125 sec. During data transmission in the Long Frame Sync mode, the transmit data pin PCMT will become low impedance when the Frame Sync signal FST is HIGH or when the 8 bit data word is being transmitted. The transmit data pin PCMT will become high impedance when the Frame Sync signal FST becomes LOW while the data is transmitted or when half of the LSB is transmitted. The internal decision logic will determine whether the next frame sync is a long or short frame sync, based on the previous frame sync pulse. To avoid bus collisions, the PCMT pin will be high impedance for two frame sync cycles after every power down state. More detailed timing information can be found in the interface timing section.
7.4.2. Short Frame Sync
The W681513 operates in the Short Frame Sync Mode when the Frame Sync signal at pin FST is HIGH for one and only one falling edge of the bit-clock at the BCLKT pin. On the following rising edge of the bit-clock, the W681513 starts clocking out the data on the PCMT pin, which will also change from high to low impedance state. The data transmit pin PCMT will go back to the high impedance state halfway through the LSB. The Short Frame Sync operation of the W681513 is based on an 8-bit data word. When receiving data on the PCMR pin, the data is clocked in on the first falling edge after the falling edge that coincides with the Frame Sync signal. The internal decision logic will determine whether the next frame sync is a long or short frame sync, based on the previous frame sync pulse. To avoid bus collisions, the PCMT pin will be high impedance for two frame sync cycles after every power down state. More detailed timing information can be found in the interface timing section.
7.4.3. General Circuit Interface (GCI)
The GCI interface mode is selected when the BCLKR pin is connected to VSS for two or more frame sync cycles. It can be used as a 2B+D timing interface in an ISDN application. The GCI interface consists of 4 pins: FSC (FST), DCL (BCLKT), Dout (PCMT) & Din (PCMR). The FSR pin selects channel B1 or B2 for transmit and receive. Data transitions occur on the positive edges of the data clock DCL. The Frame Sync positive edge is aligned with the positive edge of the data clock DCLK. The data rate is running half the speed of the bit-clock. The channels B1 and B2 are transmitted consecutively. Therefore, channel B1 is transmitted on the first 16 clock cycles of DCL and B2 is transmitted on the second 16 clock cycles of DCL. For more timing information, see the timing section.
- 11 -
Publication Release Date: October, 2005 Revision A11
W681513
7.4.4. Interchip Digital Link (IDL)
The IDL interface mode is selected when the BCLKR pin is connected to VDD for two or more frame sync cycles. It can be used as a 2B+D timing interface in an ISDN application. The IDL interface consists of 4 pins: IDL SYNC (FST), IDL CLK (BCLKT), IDL TX (PCMT) & IDL RX (PCMR). The FSR pin selects channel B1 or B2 for transmit and receive. The data for channel B1 is transmitted on the first positive edge of the IDL CLK after the IDL SYNC pulse. The IDL SYNC pulse is one IDL CLK cycle long. The data for channel B2 is transmitted on the eleventh positive edge of the IDL CLK after the IDL SYNC pulse. The data for channel B1 is received on the first negative edge of the IDL CLK after the IDL SYNC pulse. The data for channel B2 is received on the eleventh negative edge of the IDL CLK after the IDL SYNC pulse. The transmit signal pin IDL TX becomes high impedance when not used for data transmission and also in the time slot of the unused channel. For more timing information, see the timing section.
7.4.5. System Timing
The system can work at 2000 kHz master clock rate only. The system clock is supplied through the master clock input MCLK and can be derived from the bit-clock if desired. An internal pre-scaler is used to generate a fixed 256 kHz and 8 kHz sample clock for the internal CODEC. If the Frame Sync is LOW for the entire frame sync period while the MCLK and BCLK pin clock signals are still present, the W681513 will enter the low power standby mode. Another way to power down is to set the PUI pin to low. When the system needs to be powered up again, the PUI pin needs to be set to HIGH and the Frame Sync pulse needs to be present. It will take two Frame Sync cycles before the pin PCMT will become low impedance.
- 12 -
W681513
8. TIMING DIAGRAMS
TFTRHM TFTRSM TMCKH TMCKL TRISE TFALL
MCLK
TMCK TFS TFSL TFTRH TFTRS TFTFH TBCKH TBCKL
FST
BCLKT
0
TFDTD
1
2
3
TBDTD
4
5
6
7
8
THID THID
0
TBCK
1
PCMT
D7 MSB
D6
D5
D4
D3
D2
D1 D0 LSB
TFS TFSL TFRRH TFRRS TFRFH
FSR
TBCKH
TBCKL
BCLKR
0
1
2
3
4
5
6
7
8
0
TBCK
1
PCMR
D7 MSB
TDRS
D6
D5
TDRH
D4
D3
D2
D1 D0 LSB
Figure 8.1 Long Frame Sync PCM Timing
- 13 -
Publication Release Date: October, 2005 Revision A11
W681513
SYMBOL 1/TFS TFSL 1/TBCK TBCKH TBCKL TFTRH TFTRS TFTFH TFDTD TBDTD THID DESCRIPTION FST, FSR Frequency FST / FSR Minimum LOW Width BCLKT, BCLKR Frequency BCLKT, BCLKR HIGH Pulse Width BCLKT, BCLKR LOW Pulse Width BCLKT 0 Falling Edge to FST Rising Edge Hold Time FST Rising Edge to BCLKT 1 Falling edge Setup Time BCLKT 2 Falling Edge to FST Falling Edge Hold Time FST Rising Edge to Valid PCMT Delay Time BCLKT Rising Edge to Valid PCMT Delay Time Delay Time from the Later of FST Falling Edge, or BCLKT 8 Falling Edge to PCMT Output High Impedance TFRRH TFRRS TFRFH TDRS TDRH BCLKR 0 Falling Edge to FSR Rising Edge Hold Time FSR Rising Edge to BCLKR 1 Falling edge Setup Time BCLKR 2 Falling Edge to FSR Falling Edge Hold Time Valid PCMR to BCLKR Falling Edge Setup Time PCMR Hold Time from BCLKR Falling Edge 20 80 50 0 50 --------------------ns ns ns ns ns
1
MIN --TBCK 2000 50 50 20 80 50 ----10
TYP 8 -------------------
MAX --2000 ----------60 60 60
UNIT kHz sec kHz ns ns ns ns ns ns ns ns
Table 8.1 Long Frame Sync PCM Timing Parameters
1
TFSL must be at least TBCK - 14 -
W681513
TFTRHM TFTRSM TMCKH TMCKL
TRISE
TFALL
MCLK
TMCK TFTFH TFTFS TFS
FST
TFTRH TFTRS TBCKH TBCKL
BCLKT
-1
0
1
TBDTD
2
3
TBDTD
4
5
6
7
8
THID
0
TBCK
1
PCMT
D7 MSB
D6
D5
D4
D3
D2
D1 D0 LSB
TFS TFRFH TFRFS
FSR
TFRRH TFRRS TBCKH TBCKL
BCLKR
-1
0
1
2
3
4
5
6
7
8
0
TBCK
1
PCMR
D7 MSB
TDRS
D6
D5
TDRH
D4
D3
D2
D1 D0 LSB
Figure 8.2 Short Frame Sync PCM Timing
- 15 -
Publication Release Date: October, 2005 Revision A11
W681513
SYMBOL 1/TFS 1/TBCK TBCKH TBCKL TFTRH TFTRS TFTFH TFTFS TBDTD THID TFRRH TFRRS TFRFH TFRFS TDRS TDRH
DESCRIPTION FST, FSR Frequency BCLKT, BCLKR Frequency BCLKT, BCLKR HIGH Pulse Width BCLKT, BCLKR LOW Pulse Width BCLKT -1 Falling Edge to FST Rising Edge Hold Time FST Rising Edge to BCLKT 0 Falling edge Setup Time BCLKT 0 Falling Edge to FST Falling Edge Hold Time FST Falling Edge to BCLKT 1 Falling Edge Setup Time BCLKT Rising Edge to Valid PCMT Delay Time Delay Time from BCLKT 8 Falling Edge to PCMT Output High Impedance BCLKR -1 Falling Edge to FSR Rising Edge Hold Time FSR Rising Edge to BCLKR 0 Falling edge Setup Time BCLKR 0 Falling Edge to FSR Falling Edge Hold Time FSR Falling Edge to BCLKR 1 Falling Edge Setup Time Valid PCMR to BCLKR Falling Edge Setup Time PCMR Hold Time from BCLKR Falling Edge
MIN --2000 50 50 20 80 50 50 10 10 20 80 50 50 0 50
TYP 8 -------------------------------
MAX --2000 ------------60 60 -------------
UNIT kHz kHz ns ns ns ns ns ns ns ns ns ns ns ns ns ns
Table 8.2 Short Frame Sync PCM Timing Parameters
- 16 -
W681513
TFS
FST
TFSRH
TFSFH TFSRS 0 1 2 TBDTD 3 4 5 6 TBDTD 7 8 9 THID 10 11 12 TBDTD 13 14
TBCKH 15 16 TBDTD
TBCKL 17 18 THID D1 D0 LSB
BCLKT
-1
TBCK
PCMT
D7 D6 D5 D4 D3 D2 D1 D0 MSB TDRS TDRH LSB
D7 D6 D5 D4 D3 D2 MSB TDRS TDRH
PCMR
D7 D6 D5 D4 D3 D2 D1 D0 MSB LSB
D7 D6 D5 D4 D3 D2 MSB
D1 D0 LSB
BCH = 0 B1 Channel
BCH = 1 B2 Channel
Figure 8.3 IDL PCM Timing
SYMBOL 1/TFS 1/TBCK TBCKH TBCKL TFSRH TFSRS TFSFH TBDTD THID
DESCRIPTION FST Frequency BCLKT Frequency BCLKT HIGH Pulse Width BCLKT LOW Pulse Width BCLKT -1 Falling Edge to FST Rising Edge Hold Time FST Rising Edge to BCLKT 0 Falling edge Setup Time BCLKT 0 Falling Edge to FST Falling Edge Hold Time BCLKT Rising Edge to Valid PCMT Delay Time Delay Time from the BCLKT 8 Falling Edge (B1 channel) or BCLKT 18 Falling Edge (B2 Channel) to PCMT Output High Impedance Valid PCMR to BCLKT Falling Edge Setup Time PCMR Hold Time from BCLKT Falling Edge
MIN --2000 50 50 20 60 20 10 10
TYP 8 -----------------
MAX --2000 ----------60 50
UNIT kHz kHz ns ns ns ns ns ns ns
TDRS TDRH
20 75
-----
-----
ns ns
Table 8.3 IDL PCM Timing Parameters
- 17 -
Publication Release Date: October, 2005 Revision A11
W681513
TFS
FST
TFSRH
TFSFH TFSRS
TBCKH
TBCKL
BCLKT
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
TFDTD
TBDTD
THID
TBDTD
TBDTD TBCK D1 D0
THID
PCMT
D7 D6 D5 D4 D3 D2 D1 D0 MSB TDRS TDRH
D7 D6 D5 D4 D3 D2
LSB MSB TDRS TDRH
LSB
PCMR
D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 MSB LSB MSB
D1 D0 LSB
BCH = 0 B1 Channel
BCH = 1 B2 Channel
Figure 8.4 GCI PCM Timing
SYMBOL 1/TFST 1/TBCK TBCKH TBCKL TFSRH TFSRS TFSFH TFDTD TBDTD THID
DESCRIPTION FST Frequency BCLKT Frequency BCLKT HIGH Pulse Width BCLKT LOW Pulse Width BCLKT 0 Falling Edge to FST Rising Edge Hold Time FST Rising Edge to BCLKT 1 Falling edge Setup Time BCLKT 1 Falling Edge to FST Falling Edge Hold Time FST Rising Edge to Valid PCMT Delay Time BCLKT Rising Edge to Valid PCMT Delay Time Delay Time from the BCLKT 16 Falling Edge (B1 channel) or BCLKT 32 Falling Edge (B2 Channel) to PCMT Output High Impedance Valid PCMR to BCLKT Rising Edge Setup Time PCMR Hold Time from BCLKT Rising Edge
Table 8.4 GCI PCM Timing Parameters
MIN --2000 50 50 20 60 20 ----10
TYP 8 -------------------
MAX --2000 ----------60 60 50
UNIT kHz kHz ns ns ns ns ns ns ns ns
TDRS TDRH
20 ---
-----
--60
ns ns
- 18 -
W681513
SYMBOL 1/TMCK TMCKH TMCK TMCKH TMCKL TFTRHM TFTRSM TRISE TFALL /
DESCRIPTION Master Clock Frequency MCLK Duty Operation Cycle for 256 HIGH kHz for
MIN --45% 50 50 50 50 -----
TYP 2000
MAX --55%
UNIT kHz
Minimum Pulse Width MCLK(512 kHz or Higher)
-------------
--------50 50
ns ns ns ns ns ns
Minimum Pulse Width LOW for MCLK (512 kHz or Higher) MCLK falling Edge to FST Rising Edge Hold Time FST Rising Edge to MCLK Falling edge Setup Time Rise Time for All Digital Signals Fall Time for All Digital Signals
Table 8.5 General PCM Timing Parameters
- 19 -
Publication Release Date: October, 2005 Revision A11
W681513
9. ABSOLUTE MAXIMUM RATINGS
9.1. ABSOLUTE MAXIMUM RATINGS Condition
Junction temperature Storage temperature range Voltage Applied to any pin Voltage applied to any pin (Input current limited to +/-20 mA) VDD - VSS 150 C -650C to +1500C (VSS - 0.3V) to (VDD + 0.3V) (VSS - 1.0V) to (VDD + 1.0V) -0.5V to +6V
0
Value
1. Stresses above those listed may cause permanent damage to the device. Exposure to the absolute maximum ratings may affect device reliability. Functional operation is not implied at these conditions.
9.2. OPERATING CONDITIONS Condition
Industrial operating temperature Supply voltage (VDD) Ground voltage (VSS)
Value
-400C to +850C +4.5V to +5.5V 0V
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.
- 20 -
W681513
10. ELECTRICAL CHARACTERISTICS
10.1. GENERAL PARAMETERS
Symbol VIL VIH VOL VOH IDD ISB Ipd IIL IOL CIN COUT Parameters Input LOW Voltage Input HIGH Voltage PCMT Output LOW Voltage PCMT Output HIGH Voltage VDD Current (Operating) - ADC + DAC VDD Current (Standby) VDD Current (Power Down) Input Leakage Current PCMT Output Leakage Current Digital Input Capacitance PCMT Output Capacitance
1. Typical values: TA = 25C , VDD = 5.0 V 2. All min/max limits are guaranteed by Winbond via electrical testing or characterization. Not all specifications are 100 percent tested.
Conditions
Min (2)
Typ (1)
Max (2) 0.6
Units V V
2.4 IOL = 3 mA IOL = -3 mA No Load FST & FSR =Vss ; PUI=VDD PUI= Vss VSSV V mA A A A A pF pF
- 21 -
Publication Release Date: October, 2005 Revision A11
W681513
10.2. ANALOG SIGNAL LEVEL AND GAIN PARAMETERS
VDD=5V 10%; VSS=0V; TA=-40C to +85C; all analog signals referred to VAG; MCLK=BCLK= 2MHz; FST=FSR=8 kHz synchronous operation
PARAMETER
SYM.
CONDITION
TYP.
TRANSMIT (A/D) MIN. MAX. ------+0.25
RECEIVE (D/A) MIN. -------0.25 MAX. ------+0.25
UNIT
Absolute Level Max. Transmit Level Absolute Gain (0 dBm0 @ 1020 Hz; TA=+25C) Absolute Gain variation with Temperature Frequency Response, Relative to 0dBm0 @ 1020 Hz
LABS TXMAX GABS
0 dBm0 = 0dBm @ 600 3.17 dBm0 for -Law 3.14 dBm0 for A-Law 0 dBm0 @ 1020 Hz; TA=+25C
1.096 0.775 1.579 1.573 0
-------0.25
VPK VRMS VPK VPK dB
GABST
TA=0C to TA=+70C TA=-40C to TA=+85C
0
-0.03 -0.05
+0.03 +0.05 -40 -30 -26 -0.4 +0.15 +0.15 0 0 -14 -32 +0.3 +0.6 +1.6
-0.03 -0.05 -0.5 -0.5 -0.5 -0.5 -0.20 -0.35 -0.8 -------0.2 -0.4 -1.6
+0.03 +0.05 0 0 0 0 +0.15 +0.15 0 0 -14 -30 +0.2 +0.4 +1.6
dB
GRTV
15 Hz 50 Hz 60 Hz 200 Hz 300 to 3000 Hz 3300 Hz 3400 Hz 3600 Hz 4000 Hz 4600 Hz to 100 kHz
---------------------------
-------1.0 -0.20 -0.35 -0.8 -------0.3 -0.6 -1.6
dB
Gain Variation vs. Level Tone (1020 Hz relative to -10 dBm0)
GLT
+3 to -40 dBm0 -40 to -50 dBm0 -50 to -55 dBm0
dB
- 22 -
W681513
10.3. ANALOG DISTORTION AND NOISE PARAMETERS
VDD=5V 10%; VSS=0V; TA=-40C to +85C; all analog signals referred to VAG; MCLK=BCLK= 2MHz; FST=FSR=8 kHz synchronous operation
PARAMETER Total Distortion vs. Level Tone (1020 Hz, -Law, C-Message Weighted) Total Distortion vs. Level Tone (1020 Hz, A-Law, Psophometric Weighted) Spurious Out-Of-Band at RO+ (300 Hz to 3400 Hz @ 0dBm0) Spurious In-Band (700 Hz to 1100 Hz @ 0dBm0) Intermodulation Distortion (300 Hz to 3400 Hz -4 to -21 dBm0 Crosstalk (1020 Hz @ 0dBm0) Absolute Group Delay Group Delay Distortion (relative to group delay @ 1200 Hz)
SYM. DLT
CONDITION +3 dBm0 0 dBm0 to -30 dBm0 -40 dBm0 -45 dBm0
TRANSMIT (A/D) MIN. 36 36 29 25 36 36 29 25 --------TYP. ------------------------MAX. -----------------------47
RECEIVE (D/A) MIN. 34 36 30 25 34 36 30 25 --------TYP. ------------------------MAX. -----------------30 -40 -30 -47
UNIT dBC
DLTA
+3 dBm0 0 dBm0 to -30 dBm0 -40 dBm0 -45 dBm0
dBp
DSPO
4600 Hz to 7600 Hz 7600 Hz to 8400 Hz 8400 Hz to 100000 Hz
dB
DSPI
300 to 3000 Hz
dB
DIM
Two tones
---
---
-41
---
---
-41
dB
DXT
--1200Hz 500 Hz 600 Hz 1000 Hz 2600 Hz 2800 Hz -----------------
-------------------
-75 360 750 380 130 130 750 18 -68
-------------------
-------------------
-75 240 750 370 120 120 750 13 -78
dBm0 sec sec
ABS D
Idle Channel Noise
NIDL
-Law; C-message A-Law; Psophometric
dBrnc0 dBm0p
- 23 -
Publication Release Date: October, 2005 Revision A11
W681513
10.4. ANALOG INPUT AND OUTPUT AMPLIFIER PARAMETERS
VDD=5V 10%; VSS=0V; TA=-40C to +85C; all analog signals referred to VAG; PARAMETER AI Input Offset Voltage AI Input Current AI Input Resistance AI Input Capacitance AI Common Mode Input Voltage Range AI Common Mode Rejection Ratio AI Amp Gain Bandwidth Product AI Amp DC Open Loop Gain AI Amp Equivalent Input Noise AO Output Voltage Range Load Resistance Load Capacitance AO & RO Output Current RO+ Output Resistance RO+ Output Offset Voltage Analog Ground Voltage VAG Output Resistance Power Supply Rejection Ratio (0 to 100 kHz to VDD, C-message) PAI Input Offset Voltage PAI Input Current PAI Input Resistance PAI Amp Gain Bandwidth Product Output Offset Voltage Load Resistance Load Capacitance SYM. VOFF,AI IIN,AI RIN,AI CIN,AI VCM,AI CMRRTI GBWTI GTI NTI VTG RLDTGRO CLDTGRO IOUT1 RRO+ VOFF,RO+ VAG RVAG PSRR VOFF,PAI IIN,PAI RIN,PAI GBWPI VOFF,PO RLDPO CLDPO CONDITION AI+, AIAI+, AIAI+, AI- to VAG AI+, AIAI+, AIAI+, AIAO, RLD10k AO, RLD10k C-Message Weighted RLD=10k to VAG RLD=2k to VAG AO, RO to VAG AO, RO 0.5 AO,RO+ VDD-0.5 RO+, 0 to 3400 Hz RO+ to VAG Relative to VSS Within 25mV change Transmit Receive PAI PAI PAI to VAG PAO- no load PAO+ to PAOPAO+, PAOdifferentially PAO+, PAOdifferentially - 24 MIN. ----10 --1.2 --------0.5 1.0 2 --1.0 ----2.429 --40 40 ----10 ----300 --TYP. --0.1 ------60 2150 95 -24 ----------1 --2.5 2.5 80 75 --0.05 --1000 ------MAX. 25 1.0 --10 VDD-1.2 --------VDD-0.5 VDD-1.0 --100 ----25 2.573 12.5 ----20 1.0 ----50 --1000 mV A M kHz mV pF k pF mA mV V dBC UNIT. mV A M pF V dB kHz dB dBrnC V
W681513
PARAMETER PO Output Current PO Output Resistance PO Differential Gain PO Differential Signal to Distortion C-Message weighted SYM. IOUTPO RPO CONDITION 0.5 AO,RO+ VDD-0.5 PAO+ to PAORLD=300, +3dBm0, 1 kHz, PAO+ to PAOZLD=300 ZLD=100nF + 100 ZLD=100nF + 20 PO Power Supply Rejection Ratio (0 to 25 kHz to VDD, Differential out) MIN. 10.0 ---0.2 45 ----40 --TYP. --1 0 60 40 40 55 40 MAX. ----+0.2 ----------dB UNIT. mA dB dBC
GPO DPO
PSRRP
O
0 to 4 kHz 4 to 25 kHz
- 25 -
Publication Release Date: October, 2005 Revision A11
W681513
10.5. DIGITAL I/O 10.5.1. -Law Encode Decode Characteristics
Normalized Encode Decision Levels Digital Code D7 Sign 8159 7903
:
Normalized D6 Chord 0 D5 Chord 0 D4 Chord 0 D3 Step 0 D2 Step 0 D1 Step 0 D0 Step 0 8031 : 1 0 0 0 1 1 1 1 4191 : 1 0 0 1 1 1 1 1 2079 : 1 0 1 0 1 1 1 1 1023 : 1 0 1 1 1 1 1 1 495 : 1 1 0 0 1 1 1 1 231 : 1 1 0 1 1 1 1 1 99 : 1 1 1 0 1 1 1 1 33 : 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 2 0 Decode Levels
1
4319 4063
:
2143 2015
:
1055 991
:
511 479
:
239 223
:
103 95
:
35 31
:
3 1 0
Notes: Sign bit = 0 for negative values, sign bit = 1 for positive values
- 26 -
W681513
10.5.2. A-Law Encode Decode Characteristics
Normalized Encode Decision Levels 4096 3968
:
Digital Code D7 Sign D6 Chord D5 Chord D4 Chord D3 Step D2 Step D1 Step D0 Step
Normalized Decode Levels
1
0
1
0
1
0
1
0
4032 :
2048 2048
:
1
0
1
0
0
1
0
1
2112 :
1088 1024
:
1
0
1
1
0
1
0
1
1056 :
544 512
:
1
0
0
0
0
1
0
1
528 :
272 256
:
1
0
0
1
0
1
0
1
264 :
136 128
:
1
1
1
0
0
1
0
1
132 :
68 64
:
1
1
1
0
0
1
0
1
66 :
2 0
1
1
0
1
0
1
0
1
1
Notes: 1. Sign bit = 0 for negative values, sign bit = 1 for positive values 2. Digital code includes inversion of all even number bits
- 27 -
Publication Release Date: October, 2005 Revision A11
W681513
10.5.3. PCM Codes for Zero and Full Scale
-Law Level + Full Scale + Zero - Zero - Full Scale Sign bit (D7) 1 1 0 0 Chord bits (D6,D5,D4) 000 111 111 000 Step bits (D3,D2,D1,D0) 0000 1111 1111 0000 Sign bit (D7) 1 1 0 0 A-Law Chord bits (D6,D5,D4) 010 101 101 010 Step bits (D3,D2,D1,D0) 1010 0101 0101 1010
10.5.4. PCM Codes for 0dBm0 Output
-Law Sample 1 2 3 4 5 6 7 8 Sign bit (D7) 0 0 0 0 1 1 1 1 Chord bits (D6,D5,D4) 001 000 000 001 001 000 000 001 Step bits (D3,D2,D1,D0) 1110 1011 1011 1110 1110 1011 1011 1110 Sign bit (D7) 0 0 0 0 1 1 1 1 A-Law Chord bits (D6,D5,D4) 011 010 010 011 011 010 010 011 Step bits (D3,D2,D1,D0) 0100 0001 0001 0100 0100 0001 0001 0100
- 28 -
W681513
11. TYPICAL APPLICATION CIRCUITS
VCC 1K 1.5K 22uF 0.1uF 1.0uF U1 17 18 19 3.9K 1.5K 1.0uF 62K 330pF 20K 3K 20 1 2 3 4 5 SPEAKER 0.01uF AO AIAI+ VAG RO+ RO+ PAI PAOPAO+ W681513 VSS u/A PUI 16 10 PCM MODE CONTROL POWER CONTROL 6 VDD 3.9K 62K select MICROPHONE 330pF
FST BCLKT PCMT MCLK PCMR BCLKR FSR
14 12 13 11 8 9 7
8KHz SY NC INPUT PCM OUTPUT 2.000 MHz CLOCK IN PCM INPUT
Figure 11.1 A USB VoIP Phone application
15
- 29 -
Publication Release Date: October, 2005 Revision A11
W681513
1K 1.5K 22uF R3 3.9K 1.0uF AIAI+ R6 62K VAG R5 62K AO C6 330pF VCC
MICROPHONE
1.5K
1.0uF R4 3.9K C7 330pF 0.01uF
R8 3K
R9 select
PAOPAI SPEAKER PAO+
R7 20K
RO+
Figure 11.2 Equivalent Circuit of Figure 11.1
SUGGESTED COMPONENT VALUES BY APPLICATION SCHEMATIC COMPONENT # R3,4 R5,6 C6,7 R9 R7 R8 TELEPHONE HANDSET 1K 27K 1200 pF SELECT 20K 3K VoIP PHONE SET 1K 91K 330 pF SELECT 20K 3K
In the handset application the gain from the handset microphone is set to 27 for the input amplifier. This is because the acoustical chamber in the telephone type handset lets the electret microphone provide an output of ~28 mVRMS. The chamber typically has a gain of 3 over a bare microphone (or one placed with only a small opening to the outside world.) Because of the high sensitivity of the earphone (150 impedance) in a typical handset, the output gain from the Power Amp is set to ~0.16 for a satisfactory listening level. In the VoIP telephone, or small wireless phones, the plastic case is typically too small to provide a reasonable acoustic chamber. Thus the output from the microphone is less than in the previous example. This results in having to set the input gain of the CODEC to ~75 to 90 and in a comparable
- 30 -
W681513
signal level to the receive telephone handset but, because of the increased gain, the Signal-to-Noise Ratio (SNR) has decreased and the signal sounds noisier. On the receive side, the gain is set as in the previous example. When the Power Amp gain is as low as 0.16 a 32 ohm load speaker can be driven. Resistor R9 sets the sidetone level (the signal fed back to the earpiece from the microphone so the telephone sounds "live") to the level desired by the designer. Capacitors C6 and C7 are introduced for external compensation to keep the input amplifier stable at such high gain figures and prevent oscillation. These capacitors are not needed when the gain is close to unity or less than unity.
- 31 -
Publication Release Date: October, 2005 Revision A11
W681513
12. PACKAGE SPECIFICATION
12.2. 20L SOP (SOG)-300MIL
SMALL OUTLINE PACKAGE (SAME AS SOG & SOIC) DIMENSIONS
2
1
c
E
HE
L
1
D
1
0.2 O
A Y SEATING PLANE b e A GAUGE
SYMBOL A A1 b c E D e HE Y L 0
DIMENSION (MM) MIN. 2.35 0.10 0.33 0.23 7.40 12.60 10.00 0.40 0 MAX. 2.65 0.30 0.51 0.32 7.60 13.00 10.65 0.10 1.27 8
DIMENSION (INCH) MIN. 0.093 0.004 0.013 0.009 0.291 0.496 0.394 0.016 0 MAX. 0.104 0.012 0.020 0.013 0.299 0.512 0.419 0.004 0.050 8
1.27 BSC
0.050 BSC
- 32 -
W681513
13. ORDERING INFORMATION
Winbond Part Number Description
W681513_ _
Package Material: Blank G = = Standard Package Pb-free Package
Product Family
W681513 Product
Package Type: S = 20-Lead Plastic Small Outline Package (SOG/SOP)
When ordering W681513 series devices, please refer to the following part numbers.
Part Number
W681513S W681513SG
- 33 -
Publication Release Date: October, 2005 Revision A11
W681513
14. VERSION HISTORY
VERSION A3 A10 A11 DATE October 1, 2003 April 2005 October, 2005 33 2 Various 22 22, 23 23 29-31 33 PAGE First published version Add Important Notice Added reference to Pb-free RoHS packaging and to VRMS Capitalized logic HIGH/LOW Added Reference to VRMS Extended Test conditions Corrected Idle Channel Noise min/max and units. Improved Application Diagrams Added G package ordering code DESCRIPTION
- 34 -
W681513
Important Notice
Winbond products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for surgical implantation, atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or sustain life. Further more, Winbond products are not intended for applications wherein failure of Winbond products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. Winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales. The information contained in this datasheet may be subject to change without notice. It is the responsibility of the customer to check the Winbond USA website (www.winbond-usa.com) periodically for the latest version of this document, and any Errata Sheets that may be generated between datasheet revisions.
- 35 -
Publication Release Date: October, 2005 Revision A11

▲Up To Search▲

Price & Availability of W681513SG

	To Download W681513SG Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .