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CXA3179N
IF Amplifier for M-ary FSK Pagers (AFC Supported)
Description The CXA3179N is a low current consumption FM IF amplifier which employs the newest bipolar process. It is suitable for M-ary FSK pagers using AFC. Features * Low current consumption : 1.1 mA (typ. at VCC=1.4 V) * Low voltage operation : VCC=1.1 to 4.0 V * Small package 24-pin SSOP * Second mixer and oscillator * Needless of IF decoupling capacitor * Reference power supply for operational amplifier and comparator * Bit rate filter with variable cut-off * AFC current output circuit * RSSI function * IF input, VCC standard * Maximum input frequency : 30 MHz Applications * M-ary FSK pagers * Double conversion pagers Structure Bipolar silicon monolithic IC Block Diagram and Pin Configuration
REG CONT REG OUT NRZ OUT LVA OUT AFC C. AFC OFF L.C. OUT MIX IN AUDIO RSSI GND
24 pin SSOP (Plastic)
Absolute Maximum Ratings * Supply voltage VCC * Operating temperature Topr * Storage temperature Tstg * Allowable power dissipation PD Operating Condition Supply voltage
7.0 -20 to +75 -65 to +150 417
V C C mW
VCC
1.1 to 4.0
V
24
23
22
21
20
19
18
17
B.S.
16
15
14
13
RSSI GND REG MIX OSC IF_LIM AFC QUAD_DET FILTER LVA LEVEL COMP
1
OSC IN
2
OSC OUT
3
MIX OUT
4
VCC
5
IF IN
6
TH CONT
7
AFC
8
QUAD
9
C1
10
11
12
C2
C3
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
--1--
FIL SW
E96Y06A8Z
CXA3179N
Pin Description Pin No. Symbol Pin voltage Equivalent circuit
VCC 300 15k
Description
1
OSC IN
1.4 V
15k
1
72
2
2
OSC OUT
0.7 V
GND VCC 1.5k
Connects the external parts of crystal oscillator circuit. A capacitor and crystal oscillator are connected to these pins and VCC.
3
3
MIX OUT
1.3 V
Mixer output. Connect a 455 kHz ceramic filter between this pin and IF IN.
GND
4
VCC
1.5k 20k 20k VCC 1.5k
Power supply.
5
IF IN
1.4 V
5
IF limiter amplifier input.
GND VCC
6
TH CONT
--
6
25k GND VCC
Determines the level comparator threshold value. Threshold value can be adjusted by inserting the resistor between Pin 6 and VCC. Normally, short to VCC.
72
7
AFC
--
7
AFC current output.
GND VCC 20k 22k
8
QUAD
1.4 V
8
20p GND
Connects the phase shifter of FM detector circuit.
--2--
CXA3179N
Pin No.
Symbol
Pin voltage
Equivalent circuit
VCC
Description
9 10 11
C1 C2 C3
0.2 V
9
10 11 35k 50k GND
Connects the capacitor that determines the LPF cut-off.
12 72 20k
12
FIL SW
--
140k GND VCC 7k 7k
Switches the LPF cut-off. Cut-off is decreased by setting this pin high. (Applied voltage range : -0.5 V to +7.0 V)
13
RSSI
0.1 V
13 70k GND 14 72 20k
RSSI circuit output.
14
AFC OFF
--
100k GND 15 19 72
Sets off the AFC circuit current. The AFC current is off by setting Pin 18 low and Pin 14 high.
15 19 20
L.C. OUT NRZ OUT LVA OUT
-- -- --
20
Level comparator, NRZ comparator and LVA comparator outputs. They are open collectors. (Applied voltage range : -0.5 V to +7.0 V)
GND VCC
72
16
AUDIO
0.2 V
16 72
Level comparator and NRZ comparator inputs. The filter circuit output is connected.
GND
--3--
CXA3179N
Pin No.
Symbol
Pin voltage
17
Equivalent circuit
Description
72 20k
17
B.S.
--
140k GND
Controls the battery saving. Setting this pin low suspends the operation of IC. (Applied voltage range : -0.5 V to +7.0 V)
20k 18
18
AFC C.
--
100k
GND VCC
Controls the time constant of the AFC circuit. Set this pin high to make the short time constant. (Applied voltage range : -0.5 V to +7.0 V)
21
REG CONT
72
--
21
Output for internal constant-voltage source amplifier. Connect the base of PNP transistor. (Current capacity : 100 A)
GND VCC
22
REG OUT
1.0 V
78k 22 1k 22k GND
Constant-voltage source output. Controlled to maintain 1.0 V.
23
GND
--
VCC 2k 4.16k 4.16k
Ground
24
MIX IN
1.4 V
24
Mixer input.
GND
--4--
CXA3179N
Electrical Characteristics (VCC=1.4 V, Ta=25 C, FS=21.7 MHz, FMOD=1.6 kHz, FDEV=4.8 kHz, AMMOD=30 %) Item Current consumption Current consumption AM rejection ratio NRZ output saturation voltage NRZ output leak current NRZ hysteresis width VB output current VB output saturation voltage REG OUT voltage LVA operating voltage LVA output leak current LVA output saturation voltage Detector output voltage Logic input voltage high level Logic input voltage low level Limiting sensitivity Detector output level ratio deviation to level comparator window width Level comparator output saturation voltage Level comparator output leak current RSSI output offset Mixer input resistance Mixer output resistance IF limiter input resistance Symbol ICC ICCS AMRR VSATNRZ ILNRZ VTWNRZ IOUT VSATVB VREG VLVA ILLVA VSATLVA VODET VTHBSV VTLBSV VIN (LIM) Conditions Measurement circuit 1, Measurement circuit 1, Measurement circuit 2, Measurement circuit 4, Measurement circuit 3, Measurement circuit 3, Vin=0.1 to 0.3 V Measurement circuit 5 Measurement circuit 5 Output current 0 A Measurement circuit 6, V1=1.4 to 1.0 V Measurement circuit 6, Measurement circuit 7 Measurement circuit 2 -- -- Measurement circuit 2, Data filter fc=2.4 kHz V2=1.0 V V2=0 V 30 k LPF Vin=0.3 V Vin=0.1 V Min. 0.7 -- 25 -- -- 0 100 -- 0.95 1.00 V1=1.0 V -- -- 50 0.9 -- -- Typ. 1.1 6 -- -- -- 10 -- -- 1.00 1.05 -- -- 63 -- -- -108 Max. 1.35 10 -- 0.4 5.0 20 -- 0.4 1.05 1.10 2.0 0.4 80 -- 0.35 -- Unit mA A dB V A mV A V V V A V
mVrms
V V dBm
VLCWR
When Pin 6 is shorted to VCC
-15
0
+15
%
VSATLC ILLC VORSSI RINLIM ROUTMIX RINLIM
Measurement circuit 9 Measurement circuit 8 Measurement circuit 10 -- -- --
-- -- -- 1.6 1.2 1.2
-- -- 150 2.0 1.5 1.5
0.4 2.0 300 2.4 1.8 1.8
V A mV k k k
--5--
CXA3179N
Electrical Characteristics Measurement Circuit
Vin 10p to 120p 15 14 13 1000p 24 23 22 21 20 19 18 17 16 15 14 13
V2 24 23 22 21 20 19 18 17 16
1.8
V2 1V
V
1
2
3
VCC
4
5
6
7
8
9
10
11
12
1 A
V1 1.4V
2
22p
3
4
5
6
7
8
9
10
11
12
15p VCC
1 V1 1.4V
8.2k
1200p 1200p
15
1200p
Measurement circuit 1
Measurement circuit 2
A
100k 24 23 22 21 20 19
V
V2 1V
50A
V
15 14 13
V2 1V
18
17
16
24
23
22
21
20
19
18
17
16
14
13
1
2
3
4
5
6
7
8
9
10
11
12 Vin
1
2
3
4
5
6
7
8
9
10
11
12
VCC
V1 1.4V
VCC
V1 1.4V
Vin
Measurement circuit 3
Measurement circuit 4
100A V3 0.5V
GND V2 1V 24 23 22
A
100k 15 14 13 21 20
V
V
V2 1V
24
23
22
21
20
19
18
17
16
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
VCC GND
V1 1.4V
VCC
V1 1.4 to 1.0V
Measurement circuit 5
Measurement circuit 6
--6--
CXA3179N
50A
V
V2 1V
V2 1V
A
100k 17 16 15
V
24
23
22
21
20
19
18
17
16
15
14
13
24
23
22
21
20
19
18
14
13
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12 Vin 0.2V
VCC
V1 1.4V
VCC
V1 1.4V
Measurement circuit 7
Measurement circuit 8
V2 1V
50A
V
24 23 22 21 20 19 18 17
V2 1V
100P
V
13
24
23
22
21
20
19
18
17
16
15
14
13
16
15
14
1
2
3
4
5
6
7
8
9
10
11
12 Vin 0.1V
1
2
3
4
5
6
7
8
9
10
11
12
VCC
V1 1.4V
VCC
V1 1.4V
Measurement circuit 9
Measurement circuit 10
--7--
Application Circuit
REG LVA NRZ LEVEL RSSI AUDIO P2
GND
P8
GND 220
P7
0.01
C1 GND GND GND GND
10
L1
R5
100k
100k
1.8H C3
1000P
GND 24 VB_REG NRZ COMP AFC C. BS LEVEL COMP AFC QUAD_DET OSC IF_LIM FILTER 23 22 21 20 19 18 17 16 15
GND 14 AFC OFF RSSI 13
S4
S3
AUDIO COMP OUT
1
C10
15P
C5
XTAL
CERAFIL
DISK
VCC
P1
GND
6.8K
1100P (100P+1000P)
GND
1420P (1200P+220P)
C4
R7
C11 680P
C12
GND
C13
GND
C7
10 C8
0.01
CXA3179N
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
AFC
GND
P9
S1
--8--
GND REG MIX LVA
S2
1000P
FIL SW
1
22P
2
3
4
5
6
7
8
9
10
11
12
C14
GND
100k
GND
R6
R8
RF SMA
C6
10P to 120P
C6
PNP R4
P6
P5
P4
P3
CXA3179N
Application Notes 1) Power Supply The CXA3179N, with built-in regulator, is designed to permit stable operation at a wide range of supply voltage from 1.1 to 4.0 V. Decouple the wiring to VCC (Pin 4) as close to the pin as possible. 2) Oscillator Input Oscillator input method a) Using Pins 1 and 2, input a self-excited oscillation signal through the composition of a Colpitts type crystal oscillator circuit. b) Directly input a local oscillation signal to Pin 1.
1
VCC
2
3
Ceramic filter
1
2
3
Ceramic filter
From local signal
Fig. 1 3) Mixer The mixer is of double-balance type. Pin 24 is the input pin. Input though a suitable matching circuit. The input impedance is 2.0 k. Pin 3 serves as the output pin for the mixer, and a load resistance of 1.5 k is incorporated. 4) IF Filter The filter to be connected between this mixer output and the IF limiter amplifier input should have the following specifications. I/O impedance : 1.5 k 10 % Band width : Changes according to applications. 5) IF Limiter Amplifier The gain of this IF limiter amplifier is approximately 100 dB. Take notice of the following points in making connection to the IF limiter amplifier input pin (Pin 5). a) Wiring to the IF limiter amplifier input (Pin 5) should be as short as possible. b) As the IF limiter amplifier output appears at QUAD (Pin 8), wiring to the ceramic discriminator connected to QUAD should be as short as possible to reduce the interference with the mixer output and IF limiter amplifier input.
3 4 5 6 7 8 9
VCC
Wire as short and apart as possible
As short as possible
Fig. 2 --9--
CXA3179N
6) Quick Charge In order to hasten the Pin 7 rising time from when power is turned on, the CXA3179N features a quick charge circuit. The capacitance value connected to Pin 7 should be chosen such that the voltage does not vary much due to discharge during battery saving. Connect a signal for controlling the quick charge circuit to Pin 18. Setting this pin high enables the quick charge mode, and setting this pin low enables the steady-state reception mode. Quick charge is used when the power supply is turned on. The battery saving must be set high at the time. Connect Pin 18 to GND when quick charge is not being used.
Power supply to the IC (Pin 4)
Quick charge (Pin 18)
5ms
1ms
1ms
Battery saving control (Pin 17)
A
T2 T1 T3 T4
Fig. 3
Example when the Pin 7 REF capacitance value is 1 F T1 in Fig. 3 : 2-level data setting time after quick charge 0 ms T2 in Fig. 3 : 4-level data setting time after quick charge 2 ms or less T3 in Fig. 3 : 4-level data can be obtained T4 in Fig. 3 : 2-level data can be obtained
--10--
CXA3179N
7) Detector The detector is of quadrature type. To perform phase shift, connect a ceramic discriminator to Pin 8. The phase shifting capacitor for the quadrature detector is incorporated. The FM (FSK) signal demodulated with the detector will be output to AUDIO (Pin 16) through the internal LPF. The AUDIO output is the anti-phase output to the NRZ OUT. The CDBM455C50 (MURATA MFG. CO., LTD.) ceramic discriminator is recommended for the CXA3179N. For the 2-level system, the CDBM455C28 can also be used.
7 8 9
6.5k Ceramic discriminator CDBM455C50 VCC
Fig. 4 The detector output level is changed according to the resistance value connected to Pin 8.
8) Filter Buffer, Level Comparator and NRZ Comparator The LPF circuit is built in this IC. The LPF output is connected internally to the NRZ comparator, level comparator and quick charge circuit.
19
16
15 L.C. LPF 0.2V DET
7
Fig. 5 Using the LPF, remove the noise from the demodulated signal and input the signal to the above three circuits.
--11--
CXA3179N
8) -1. LPF Constant The composition of the data filter is ternary. The first-stage cut-off fC1 is fC1 = 1 2C11R
The second-stage cut-off fC2 is fC2 = 1 2RC12 C13 , Q= C12 C13
C11, C12, C13 : R:
External capacitance shown in the Application Circuit IC internal resistance
The Butterworse characteristic is for C12=C13=C14.
R is approximately 55 k 20 % when Pin 12 is low. The table below shows the example of constants to data rate. Capacitance (pF) H L H L H L H L 6800 1500 PIN9 1100 P PIN10 680 P PIN11 1420 P PIN9 1100 P PIN10 680 P PIN11 1420 fc (Hz) -- 430 950 1900 1000 2000 1000 2000 Data rate -- 512 bps (2 levels) 1200 bps (2 levels) 2400 bps (2 levels) 1600 bps (2 levels) 3200 bps (2 levels) 3200 bps (4 levels) 6400 bps (4 levels)
8) -2. Comparator Output The level comparator and the NRZ comparator shape the waveform of this input signal and output it as a square wave. The comparator output stage is for open collector. Thus, if the CPU is of CMOS type and the supply voltage is different, a direct interface as illustrated in the figure below can be implemented.
VCC 1.4V VCC
Pin 12 filter switch
4
CMOS power supply
(15) 19 Comparator output CMOS IC
Fig. 6 --12--
CXA3179N
8) -3. Level Comparator Output The level comparator characteristics are as shown in the figure below. Therefore, a high signal is output at the bit border even if the input signal is a 4.8 kHz signal. This high output interval varies according to the frequency response of the bit rate filter, and widens as the cut-off frequency becomes lower. The decoder avoids this high interval when processing data.
Input signal
H Output
L -4.8 -1.6 f0 +1.6 +4.8 Level comparator output
Input frequency deviation [kHz]
9) REG CONT Controls the base bias of the external transistors. 10) LVA OUT This pin goes high (open) when the supply voltage becomes lower. Since the output is an open collector, it can be used to directly drive the CMOS device. The setting voltage of the LVA is 1.05 V (typ.), and it possesses a hysteresis with respect to the supply voltage. The hysteresis width is 50 mV (typ.). 11) B.S. Operation of the CXA3179N can be halted by setting this pin low. This pin can be connected directly to the CMOS device. The current consumption for battery saving is 10 A or less (at 1.4 V).
B.S. 17
Fig. 7
--13--
CXA3179N
12) M-ary (M=2- or 4-level) FSK Demodulation System 12)-1. Output Waveform Polarity discrimination output and level comparator output are used to demodulate the 4-level waveform shown below. [4-level FSK demodulating waveform]
+4.8kHz
+1.6kHz 01 00 10 11 01 10 00
-1.6kHz
-4.8kHz
[NRZ OUT] Polarity discrimination output
(When the input frequency is higher than the local frequency)
POS
0
0
1
1
0
1
0
The polarity can be inverted by setting the local frequency higher than the input frequency.
NEG
[L.C. OUT] Level comparator output
1.6kHz
1 4.8kHz
0
0
1
1
0
0
The 4-level FSK demodulating data is divided into an NRZ OUT and L.C. OUT shown above. Here, the NRZ OUT corresponds to a conventional NRZ comparator output. The L.C. OUT is made comparing the demodulated waveform amplitude to the IC internal reference voltage levels. When the threshold value of L.C. OUT is not appropriate to the detector output, the resistance value on Pin 8 should be varied for the detector output level adjustment or the resistor should be inserted between Pin 6 and VCC for the level comparator threshold value adjustment. For the 2-level FSK demodulation, it corresponds to a conventional NRZ comparator output.
6
R VCC
--14--
CXA3179N
12)-2. 4-level Signal and Threshold Value The demodulated signal is optimally matched to the NRZ comparator threshold value by applying AFC (see 13) AFC). (operation point correction using a feedback loop filter) The comparator threshold value is fixed. The level comparator threshold value can be adjusted by varying the detector output level by changing the damping resistance of the discriminator. (AC gain adjustment)
Level comparator threshold value 1 NRZ threshold value=Demodulated signal average voltage Level comparator threshold value 2
AC gain adjustment 12)-3. Offset Amount and Threshold Value Immediately after power-on when the REF capacitor is not charged with the correction voltage, if the input frequency has an offset, some time is required to correct this offset. In addition, the times required to obtain 2-level and 4-level data differ according to the offset amount. a) 2-level signals In the case of 2-level signals, correct data is obtained when the offset amount is smaller than the detector output amplitude. This is 75 mV or less when the detector output level is 150 mVp-p which corresponds to within 4.8 kHz when converted to a frequency by the S curve. Thus, 2-level data is obtained without an operation point correction time lag when the frequency offset is within 4.8 kHz.
NRZ threshold value offset
b) 4-level signals In the case of 4-level signals, correct data is obtained when the offset amount is less than 1/3 of the detector output amplitude (during 4.8 kHz DEV). This is 25 mV or less when the detector output level is 150 mVp-p which corresponds to 1.6 kHz or less when converted to a frequency by the S curve. Thus, 4level data is obtained without an operation point correction time lag when the frequency offset is within 1.6 kHz
Level comparator threshold value 1 NRZ threshold value offset Level comparator threshold value 2
As shown above, 4-level signals have an allowable offset range 1/3 that of 2-level signals. When the offset exceeds this allowable range, time is required to determine the operation point and obtain correct data through feedback. Also, even if the offset is within the allowable range, the output pulse duty changes until the offset is 0. --15--
CXA3179N
13) AFC The AFC is of the current output type which outputs the frequency deviation in the form of the current and converts it to the voltage. The output current range is approximately 0.4 A for the slow mode and 70 A for the fast mode. The circuit to be connected with this pin should have the higher impedance. The operating range of the AFC pin is between approximately 0.1 V to (VCC -0.2) V. Use the buffer amplifier to expand the operating range.
AUDIO 16 BUF COMP LPF 19 Vref V=it/C 1st MIX To CXA3179N 1st OSC VCO C RF Vin (S curve voltage)
7
Vref
External parts
The Pin 7 voltage V continues to change till the Vin value reaches the Vref value. When these values are equal, the Pin 7 output current becomes "0" and the voltage is determined by the charge and time. Therefore, the Pin 7 voltage is undefined. The AFC voltage varies, for example, as shown below by the VCO characteristics. The AFC voltage follows the VCO characteristics because this voltage is independent of the slope of the S curve. In other words, the CXA3179N operates according to the VCO characteristics when the VCO characteristics have the linearity with respect to the voltage and the VCO characteristics can be controlled within the range shown in the graph below.
(VCC-0.2)V
Pin 7 voltage
A B
C 0.1V f0 Input frequency
--16--
CXA3179N
14) Sensitivity Adjustment Method The constants shown in the Application Circuit are for the standard external parts. However, adjustment may be necessary depending on the conditions of use, characteristics of external parts, and the RF system circuit and decoder connected to the IF IC, etc. Adjust the sensitivity according to the following procedures. a) MIX IN matching When using a matching circuit between the RF system circuit and MIX IN of the CXA3179N, adjust the trimmer to obtain the optimal sensitivity while monitoring the AUDIO output. b) Local input level The mixer circuit gain is dependent on the local signal input level to OSC IN. The input level to OSC IN should be set as high as possible within the range of -6 to +2 dBm as shown in the graph of "Local input level vs. Mixer gain characteristics". However, care should be taken as raising the input level above +2 dBm will cause the sensitivity to drop. When creating the local signal using the internal oscillator circuit, the oscillation level varies according to the external capacitances attached to Pins 1 and 2 and the characteristics of the used crystal. Therefore, be sure to adjust the external capacitance values attached to Pins 1 and 2 according to the crystal characteristics.
OSC
1
C1 VCC
2
C2
C1 and C2 have the following range in the figure above. C1 C2 C1 = C2 to C1 =5C2 As for the ratio of C1 to C2, the oscillation stabilizes as C1 approaches equality with C2. The oscillation level decreases as the C1 and C2 values become larger, and increases as the C1 and C2 values become smaller. Use a FET probe to confirm the local input level. c) LPF constant The data filter cut-off may need to be changed depending on the characteristics of the connected decoder. Adjust the capacitance values of Pins 9 to 12 while checking the incoming sensitivity including the decoder. If the capacitance values are too large, the detector output waveform will deviate at high data rates, causing the sensitivity to drop. Conversely, if the capacitance values are too small, the LPF will be easily affected by noise, causing the sensitivity to drop. Adjust capacitance values of Pins 9 to 12 so that the capacitance value described in "8)-1. LPF Constant" becomes smaller.
--17--
CXA3179N
d) Detector output level The NRZ comparator and level comparator threshold values are fixed for the CXA3179N. In the case of 4level signals, the relationship between the level comparator threshold value and the detector output level affects the sensitivity. The detector output level can be adjusted by the resistance attached to Pin 8. Increasing the resistance value also increases the output level, and vice versa. The Pin 8 resistance value differs according to the ceramic discriminator attached to Pin 8. When the discriminator is changed to a different type, the resistance value must be adjusted. Adjust the resistance value while monitoring the level comparator output waveform or the sensitivity including the decoder. e) AFC The CXA3179N uses AFC to correct the IF frequency deviation. When the IF frequency deviation amount is large, correction takes time and may lower the sensitivity. Adjust the oscillator frequency of the local oscillator so that the center frequency of the signal input to Pin 5 (IF IN) is as close to 455 kHz as possible. 15) CXA3179N Standard Board Description * Outline This board contains the external parts shown in the Application Circuit in order to evaluate the CXA3179N operation * Features The following CXA3179N basic operations can be checked. 1) Varying the data filter cut-off 2) Battery saving and other mode switching 3) NRZ output and level comparator output pins 4) AFC pin -- Pin 7 serves as the output pin for the AFC. * Method of use 1) Input the CXA3179N supply voltage VCC=1.4. This IC operates with a single power supply. 2) The CXA3179N uses a 21.245 MHz crystal. Input the RF signal from the RF pin and use this IC in the condition where IF=455 kHz. 3) The AFC pin voltage is undefined with the IC itself because the current output circuit is employed for the AFC. For the evaluation, be sure to apply the bias to the AFC pin externally or to make the AFC loop. 4) Set the mode switches. * Mode switch setting Mode switches S1, S2, S3 and S4 are provided in four locations in the board. Each basic operation can be confirmed by switching these mode switches while referring to the board layout. See the table in "15) Control Pins" for the mode switching. * Device specification See these specifications for the IC specifications. The ICs for this evaluation board are ES specification. * Circuit diagram The circuit diagram is the same as the Application Circuit in these Specifications. --18--
CXA3179N
15) -1. Standard Board Layout
VCC
GND
S4
PNP
RF
24 XTAL
13
DISK 1 12
CERAFIL
3179 EVALUATION BOARD
15) -2. Mode Switch Pattern
Low
Slow charge
L
Sleep
S1
S3
S2
L
AFC operation
S4
S3
High AFC C.
Quick charge
H B.S.
IC operation
H AFC-OFF
AFC off
L
fc : High
S1
H FIL SW
fc : Low
--19--
S2
CXA3179N
15) -3. List of Standard Board Parts Value Part # Remarks (Manufacture) Note
Resistor 220 8.7 k 100 k R4 R7 R5 R6 R8
(RIVER)
E12 series 1/8W
Capacitor 6.8 P to 45 P 15 P 22 P 100 P 1000 P 1100 P 680 P 1420 P 0.01 1 10 C2 C5 C4 C14 C3 C11 C12 C13 C8 C9 C10 C6 C7 TZ03P450FR169 (MURATA PRODUCTS) TRIMMER CAPACITOR
DD100 series temperature characteristics type B (MURATA PRODUCTS)
CERAMIC CAPACITOR E12 series (high dielectric constant type)
25 V 1 (SHIN-EI TUSHIN KOGYO CO., LTD.) 25 V 10 (SHIN-EI TUSHIN KOGYO CO., LTD.)
ELECTROLYTIC CAPACITOR E6 series
Inductor 1.8 H L1 EL0405 (TDK Products) E12 series 2.5 mm pitch (Lead Pitch)
Active Component PNP 2SA1015 (TOSHIBA CORPORATION)
Crystal 21.245 MHz XTAL NR-18BN (NIHON DEMPA KOGYO CO., LTD.)
--20--
CXA3179N
Ceramic Filter CERAFIL CFWS455D (MURATA PRODUCTS) 455 kHz 1.5 k
Ceramic Discriminator DISC CDBM455C50 (MURATA PRODUCTS) 455 kHz
Switch S1, S2 S3, S4 Connector RF HRM300-25 (HIROSE ELECTRIC CO., LTD.) SMA CONNECTOR ATE1D-2M3-10 (FUJISOKU CORPORATION) ON-ON (1 poles)
Pin x2 x6 Mac 8 test pin ST-1-3 (Mac eight) Mac 8 test pin LC-2-G (Mac eight) L=10 mm 0.8
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CXA3179N
Example of Representative Characteristics
Mixer input audio response and RSSI characteristics S+N+D
0
1000
RSSI -10 RF 21.7MHz LOCAL 21.245MHz -6dBm Audio 1.6kHz CW Dev. 4.8kHz 0dB = 63.1mVrms VCC = 1.4V T = 25C 800
Audio response [dB]
-20
600
-30
400
-40
200
-50 S/N -60 -120 -110 -100 -90 -80 -70 -60 Mixer input level [dBm] -50 -40 -30 -20
0
Current consumption characteristics 1.4
Mixer I/O characteristics and 3rd intercept point
Current consumption [mA]
-20 1.3 -30
Output level [dBm]
1.2 1.1 1.0 0.9
fO -40 -50 -60 -70 fO=21.7MHz fLO=21.245MHz -6dBm f1=21.725MHz f2=21.750MHz The I/O level is for the values read at I/O pin with the spectrum analyzer -40 -30 -20 -10 Mixer input level [dBm] 0
f1 + f2
1.0
2.0 3.0 Supply voltage [V]
4.0
-80 -60 -50
--22--
RSSI [mV]
CXA3179N
Local input level vs. Mixer gain characteristics
10
Mixer gain [dB]
5
0
fRF 21.7MHz -60dBm fLO 21.245MHz 0.01
1
-5 50
-20
-15
-10 -5 Local input level [dBm]
0
5
Variable cut-off characteristics of audio filter 0 Pin 12 voltage L H
-10
Response [dB]
-20
-30
-40
-50
-60 100 200 500 1k 2k 5k Input frequency [Hz] Level comparator characteristics 2.0 1.8 10k
Comparator output voltage [mV]
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 150 200 250 Comparator input voltage [mV] 300
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CXA3179N
Level comparator threshold value control characteristics (Output low high switching level) Representative example using typical sample
Level comparator threshold value [mV]
300
250
210 200
150 Typical value when Pin 6 is shorted to VCC 100 0 0.5 1.0 1.5 2.0 Pin 6 current [A] 2.5 3.0
NRZ comparator characteristics
1.6
Comparator output voltage [V]
1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 160 180 200 220 240 Comparator input voltage [mV] 260
LVA characteristics
1.2
LVA comparator output voltage [V]
1.0 0.8 0.6 0.4 0.2 0 1.00 1.05 Supply voltage [V] 1.10 1.15
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CXA3179N
RSSI output voltage temperature characteristics
800
RSSI output voltage characteristics [mV]
700
600
500
400
300 : -20C : 0C : 25C : 50C : 75C -110 -100 -90 -80 -70 -60 RF input level [dBm] -50 -40 -30 -20
200
100 -120
Detector output level and level comparator threshold value temperature characteristics 4.8kHz Dev. detector output level 100
Detector output level and level comparator threshold value [mV]
Level comparator threshold value for positive side
50 1.6kHz Dev. detector output level
0
Level comparator threshold value for negative side
-50
:H :L -100 -20 0 25 50 Temperature [C] 75
L H
--25--
CXA3179N
AFC output current characteristics
80 0.7 60 FAST SLOW 20 0 AFC OFF -20 0.3 -40 -60 -80 447 450 455 IF input frequency [kHz] S curve characteristics 460 463 0.5 0.7 0 0.5 0.3 40
Fast current [A]
340 320 300
Audio output DC voltage [mV]
280 260 240 220 200 180 160 140 120 100 447 450 455 IF input frequency [kHz] 460 463
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Slow current [A]
CXA3179N
Package Outline
Unit : mm
24PIN SSOP(PLASTIC)
+ 0.2 1.25 - 0.1 7.8 0.1 0.1 13
24
A
1 b
12
0.13 M B 0.65
5.6 0.1
+ 0.05 0.15 - 0.02
0.5 0.2
DETAIL B : SOLDER 0 to 10
(0.15)
0.1 0.1
(0.22)
b=0.22 0.03
DETAIL B : PALLADIUM
NOTE: Dimension "" does not include mold protrusion. DETAIL A
PACKAGE STRUCTURE
PACKAGE MATERIAL EPOXY RESIN SOLDER/PALLADIUM PLATING 42/COPPER ALLOY 0.1g LEAD TREATMENT LEAD MATERIAL PACKAGE MASS
SONY CODE EIAJ CODE JEDEC CODE
SSOP-24P-L01 SSOP024-P-0056
NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).
--27--
+ 0.03 0.15 - 0.01
+ 0.1 b=0.22 - 0.05
7.6 0.2

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