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| DATA BULLETIN MX029 Features Dual Digitally Controlled Amplifier PRELIMINARY INFORMATION Applications Cellular and LMR Radios PABX's, Electronic Mail, TAM's Automatic Test Equipment Remote Gain Adjustments Digitally Set Audio Control Levels 2 Digitally Controlled Amplifiers 48dB Gain/Attenuation in 2dB Steps + Mute Individual Control with a 14-Bit Serial Word Separate Fixed Gain Buffer Amplifier SERIAL CLOCK DATA INPUT LOAD/LATCH SERIAL INTERFACE VDD STAGE 1 CONTROL REGISTER VSS BIAS VSS BIAS CH1, INPUT 1 CH1, INPUT 2 CH1, INPUT 3 TO STAGE 1 CONTROL REGISTER CH1, OUTPUT 1 G CH1, OUTPUT 2 VSS BIAS STAGE 1 CONTROL REGISTER VSS CH2, INPUT 1 BIAS G CH2, INPUT 2 CH2, OUTPUT 1 UNIVERSAL AMP IN UNIVERSAL AMP OUT BIAS The MX029 Digitally Controlled Amplifier Array replaces audio level controls in radio and wireline communications applications. It is a single-chip LSI circuit comprised of two discrete, digitally controlled gain sections. Each section has 48 distinct gain steps (+/-48dB of range in 2dB steps) plus MUTE. As shown in Figure 1, both gain stages have switchable inputs. This switching allows for selection of three different input signals on one channel and two on the other channel. One of the channels also has output switching. In addition to two digitally controlled gain stages, there is a general purpose inverting amplifier. The gain of this amplifier is controlled externally via negative feedback. Control of each gain control section is accomplished through the serial interface. All switching is accomplished using controlled rise and fall times, thereby assuring no transients (clicks or pops). The MX029 requires a single 5-volt supply and is available in the following packages: 16-pin SOIC (MX029DW), 16-pin CDIP (MX029J), and 24-pin TSSOP (MX029TN). 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 2 MX029 CONTENTS Section Page 1. Block Diagram ................................................................................................................. 3 2. Signal List ........................................................................................................................ 4 3. External Components ..................................................................................................... 5 4. Application....................................................................................................................... 5 4.1 Recommendations ................................................................................................................. 5 5. Control Data and Timing................................................................................................. 6 6. Performance Specification ............................................................................................. 8 6.1 Electrical Performance ........................................................................................................... 8 6.1.1 Absolute Maximum Ratings .......................................................................................................... 8 6.1.2 Operating Limits............................................................................................................................ 8 6.1.3 Operating Characteristics ............................................................................................................. 9 6.2 Serial Interface Timing ......................................................................................................... 10 6.3 Packaging............................................................................................................................. 11 MX-COM, Inc. reserves the right to change specifications at any time and without notice. 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 3 MX029 1. Block Diagram SERIAL CLOCK DATA INPUT LOAD/LATCH SERIAL INTERFACE VDD STAGE 1 CONTROL REGISTER VSS BIAS VSS BIAS CH1, INPUT 1 CH1, INPUT 2 CH1, INPUT 3 TO STAGE 1 CONTROL REGISTER CH1, OUTPUT 1 G CH1, OUTPUT 2 VSS BIAS STAGE 1 CONTROL REGISTER VSS CH2, INPUT 1 BIAS G CH2, INPUT 2 CH2, OUTPUT 1 UNIVERSAL AMP IN UNIVERSAL AMP OUT BIAS Figure 1: Device Block Diagram 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 4 MX029 2. Signal List Pin No. J, DW 1 TN 1 Serial Clock This external clock input is used to "clock in" the Control Data. See Figure 4 for timing information. This input has an internal 1M pullup resistor. Input: Operation of the two amplifier channels (Ch1 - Ch2) is controlled by the data entered serially at this pin. The data is entered (bit 13 to bit 0) on the rising edge of the external Serial Clock. The data format is described in Tables 1-5 and Figure 3. This input has an internal 1M pullup resistor. This function governs the loading and execution of the control data. During serial data loading this input should be kept at a logical "1" to ensure that data rippling past the latches has no effect. When all 14 bits have been loaded this input should be strobed "1 - 0 -1" to latch the new data in. Data is executed on the rising edge of the strobe. Analog Input. Analog Input. Analog Input. Analog Input. Negative supply (GND). The output of the on-chip bias circuitry, held at VDD/2. Analog Input. Normally used for FSK data. Analog Output. Analog Output. Analog Output. Output from general purpose amplifier. Inverting input to general purpose amplifier. Positive supply rail. A single +5-volt power supply is required. No internal connection Type Description 2 4 Control (Data) 3 5 Load/ Latch 4 5 6 7 8 9 10 11 12 13 14 15 16 6 7 8 9 12 13 16 17 18 20 21 23 24 2, 3, 10, 11,14, 15, 19, 22 Ch 1 Input 1 Ch 1 Input 2 Ch 2 Input 1 Ch 2 Input 2 VSS VBIAS Ch 1 Input 3 Ch 2 Output Ch 1 Output Ch 1 Output Universal Amp Out Universal Amp In VDD N/C 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 5 MX029 3. External Components VDD Serial Clock Input Serial Control Data Input Load/Latch Ch 1 Input 1 Ch 1 Input 2 Ch 2 Input 1 Ch 2 Input 2 C1 C2 C3 C4 VSS 1 2 3 4 5 6 7 8 16 15 14 13 VDD Universal Amp In Universal Amp Out Ch 1 Output 1 Ch 1 Output 2 Ch 2 Output Ch 1 Input 3 VBIAS C5 C6 MX029 12 11 10 9 C1 to C5 C6 Notes: Note 1 0.1F 1.0F 20% 20% 1. Analog input capacitors C1 to C5 are only required for a.c. input signals; d.c. input signals do not require these components. Figure 2: Recommended External Components 4. Application 4.1 Recommendations To avoid noise and instability the following practices are recommended: 1. Use a clean, well-regulated power supply. 2. Keep leads short. 3. Inputs and outputs should be shielded wherever possible. 4. Analog tracks should not run parallel to digital tracks. 5. A "Ground Plane" connected to Vss will assist in eliminating external pick-up on the channel input and output pins. 6. Avoid running High Level Outputs adjacent to Low Level Inputs. 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 6 MX029 5. Control Data and Timing The gain and I/O signal path for each section (Channels 1 and 2) is set individually by a 14-bit data word (D0 to D13). Data is loaded on the rising edge of the Serial Clock. Loaded data is executed on the rising edge of the Load/Latch pulse. The 14-bit word consists of 1 channel address bit (D7) for selection of the channel to be programmed, 6 bits for setting the gain/attenuation level (D8-D13), 3 bits for input selection (D4 and D6), and 4 bits for output settings (D0-D3). This format is illustrated in Figure 3. D13 G SET D12 G SET D11 G SET D10 G SET D9 G SET D8 G SET D7 CHAN ADDR CHANNEL ADDRESS D6 IN SEL D5 IN SEL D4 IN SEL D3 OUT SET D2 OUT SET D1 OUT SET D0 OUT SET GAIN/ATTN LEVEL INPUT SELECT OUTPUT SETTINGS Figure 3: Data Word Format Tables 1-5 show how the data word is used to control channel selection, gain/attenuation, input selection and output settings, respectively. To calculate the data word used to control channel gain/attenuation use the following formula: gain dB 25 + = The decimal equivalent of binary Data Word 2 For example: using a gain of +34dB, D13 - D8 +34dB 25 + = 42 = $2A = 2 101010 D13 0 0 0 0 D12 0 0 0 0 D11 0 0 0 0 D10 0 0 0 0 D9 0 0 1 1 D8 0 1 0 1 GAIN SET (dB) MUTE -48 -46 -44 0 1 1 0 0 1 0 1 1 1 1 1 1 0 0 1 1 1 1 1 1 0 0 0 0 1 1 0 0 0 0 1 1 0 0 1 1 0 1 0 1 0 1 +42 +44 +46 +48 +48 +48 Table 1: Gain/Attenuation Level 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 7 MX029 D7 0 1 Channel Selected 1 2 Table 2: Channel Selection D6 0 0 0 0 1 1 1 1 D5 0 0 1 1 0 0 1 1 D4 0 1 0 1 0 1 0 1 INPUTS SELECTED NONE 1 2 1&2 3 1&3 2&3 1, 2, & 3 Table 3: Input Select D3 0 0 1 1 D2 0 1 0 1 OUTPUT 2 SETTINGS high impedance amplifier output VSS VBIAS Table 4: Settings for Output 2 (Ch 1 only) D1 0 0 1 1 D0 0 1 0 1 OUTPUT 1 SETTINGS high impedance amplifier output VSS VBIAS Table 5: Settings for Output 1 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 8 MX029 6. Performance Specification 6.1 Electrical Performance 6.1.1 Absolute Maximum Ratings Exceeding these maximum ratings can result in damage to the device. General Supply (VDD-VSS) Voltage on any pin to VSS Current VDD VSS Any other pin Total Allowable Power Dissipation at TAMB 25C Derating above TAMB 25C Operating temperature Storage temperature -40 -55 Min. -0.3 -0.3 -30 -30 -20 Max. 7.0 (VDD + 0.3) 30 30 20 800 10 85 125 mA mW Max. mW/C above TAMB 25C C C Units V V mA 6.1.2 Operating Limits Correct operation of the device outside these limits is not implied. Min. VDD Operating temperature 4.5 -40 Typ. 5.0 Max. 5.5 85 Units V C 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 9 MX029 6.1.3 Operating Characteristics For the following conditions unless otherwise specified: VDD = 5.0V, TAMB = 25C Audio level 0dB ref. = 775mVRMS Notes Current: All Stages Operating Digital Inputs Input Logic "1" Input Logic "0" Digital Input Impedance Gain Control Amplifier Stages Bandwidth (-3dB) Output Impedance Total Harmonic Distortion Interstage Isolation Gain/Attenuation Gain/Attenuation Steps (48 total) Step Error Input Impedance Input Referred Offset Voltage (VIOS) Universal Amplifier Bandwidth (-3dB) Output Impedance Total Harmonic Distortion Open Loop DC Gain Notes: 1. Gain set to maximum (+48 dB) 2. Gain Set 0dB. Input Level 1kHz -3.0dB (549mVrms) 3. Gain externally set to 10 dB. 4. With a 100k load on the output. 3 3 10 1.0 0.35 60 2.0 0.5 kHz k % dB 50.0 10 46 2, 4 1 3.3 1.0 0.35 60.0 48 2.0 0.4 2.0 0.5 kHz k % dB dB dB dB k mV 0.5 1.0 3.5 1.5 V V M 3.0 mA Min. Typ. Max Units 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 10 MX029 6.2 Serial Interface Timing Parameter tPWH tPWL tDS tDH tLLO tLLD tLLW Serial Clock "High" Pulse Width Serial Clock "Low" Pulse Width Data Set-up Time Data Hold Time Load/Latch Over Time Load/Latch Delay Load/Latch Pulse Width Serial Data Clock Frequency 200 150 2.0 Min. 250 250 150 50 0 Typ. Max. Units ns ns ns ns ns ns ns MHz Serial Clock t PWH t PWL 1ST CLOCK PULSE 14TH CLOCK PULSE t DS t DH Serial Data D13 D12 D1 D0 Load/Latch t LLD t LLW t LLO Figure 4: Serial Timing Diagram 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 11 MX029 6.3 Packaging A A B C E H J L P T Y Package Tolerances DIM. MIN. TYP. MAX. ALTERNATIVE PIN LOCATION MARKING B E L PIN 1 Y C H J P T 0.311 (7.90) 0.303 (7.70) 0.169 (4.30) 0.177 (4.50) ---------0.047 (1.20) 0.248 (6.30) 0.256 (6.50) 0.002 (0.05) 0.006 (0.15) 0.007 (0.17) 0.012 (0.30) 0.030 (0.75) 0.020 (0.50) 0.0256 (0.65) 0.003 (0.08) 0.008 (0.20) 0 8 NOTE : All dimensions in inches (mm.) Angles are in degrees Figure 5: 24-pin TSSOP Mechanical Outline: Order as part no. MX029TN Package Tolerances A Z B E W L PIN 1 X Y C H J P K T DIM. A B C E H J K L P T W X Y Z MIN. TYP. MAX. 0.413 (10.49) 0.395 (10.03) 0.299 (7.59) 0.286 (7.26) 0.093 (2.36) 0.105 (2.67) 0.419 (10.64) 0.390 (9.90) 0.003 (0.08) 0.020 (0.51) 0.013 (0.33) 0.020 (0.51) 0.041 (1.04) 0.016 (0.41) 0.050 (1.27) 0.050 (1.27) 0.009 (0.23) 0.0125 (0.32) 45 0 10 7 5 5 ALTERNATIVE PIN LOCATION MARKING NOTE : All dimensions in inches (mm.) Angles are in degrees Figure 6: 16-pin SOIC Mechanical Outline: Order as part no. MX029DW 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. Dual Digitally Controlled Amplifier 12 MX029 Package Tolerances A DIM. MIN. 0.753 (19.13) 0.285 (7.24) 0.165 (4.19) 0.370 (9.40) TYP. MAX. 0.767 (19.48) 0.291 (7.39) 0.230 (5.84) 0.415 (10.53) B E1 E T PIN 1 K H L J J1 F P K1 C A B C E E1 F H J J1 K K1 L P T 0.300 (7.61) 0.317 (8.04) 0.70 (17.78) 0.020 (0.51) 0.018 (0.46) 0.055 (1.39) 0.053 (1.33) 0.080 (2.03) 0.075 (1.91) 0.080 (2.03) 0.115 (2.92) 0.200 (5.08) 0.100 (2.54) 0.0098 (0.249) 0.0102 (0.259) NOTE : All dimensions in inches (mm.) Angles are in degrees Figure 7: 16-pin CDIP Mechanical Outline: Order as part no. MX029J 1998 MX-COM, INC. www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054 Doc. # 20480096.008 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA. All trademarks and service marks are held by their respective companies. CML Microcircuits COMMUNICATION SEMICONDUCTORS CML Product Data In the process of creating a more global image, the three standard product semiconductor companies of CML Microsystems Plc (Consumer Microcircuits Limited (UK), MX-COM, Inc (USA) and CML Microcircuits (Singapore) Pte Ltd) have undergone name changes and, whilst maintaining their separate new names (CML Microcircuits (UK) Ltd, CML Microcircuits (USA) Inc and CML Microcircuits (Singapore) Pte Ltd), now operate under the single title CML Microcircuits. These companies are all 100% owned operating companies of the CML Microsystems Plc Group and these changes are purely changes of name and do not change any underlying legal entities and hence will have no effect on any agreements or contacts currently in force. CML Microcircuits Product Prefix Codes Until the latter part of 1996, the differentiator between products manufactured and sold from MXCOM, Inc. and Consumer Microcircuits Limited were denoted by the prefixes MX and FX respectively. These products use the same silicon etc. and today still carry the same prefixes. In the latter part of 1996, both companies adopted the common prefix: CMX. This notification is relevant product information to which it is attached. CML Microcircuits (USA) [formerly MX-COM, Inc.] Product Textual Marking On CML Microcircuits (USA) products, the `MX-COM' textual logo is being replaced by a `CML' textual logo. Company contact information is as below: CML Microcircuits (UK)Ltd COMMUNICATION SEMICONDUCTORS CML Microcircuits (USA) Inc. COMMUNICATION SEMICONDUCTORS CML Microcircuits (Singapore)PteLtd COMMUNICATION SEMICONDUCTORS Oval Park, Langford, Maldon, Essex, CM9 6WG, England Tel: +44 (0)1621 875500 Fax: +44 (0)1621 875600 uk.sales@cmlmicro.com www.cmlmicro.com 4800 Bethania Station Road, Winston-Salem, NC 27105, USA Tel: +1 336 744 5050, 0800 638 5577 Fax: +1 336 744 5054 us.sales@cmlmicro.com www.cmlmicro.com No 2 Kallang Pudding Road, 09-05/ 06 Mactech Industrial Building, Singapore 349307 Tel: +65 7450426 Fax: +65 7452917 sg.sales@cmlmicro.com www.cmlmicro.com D/CML (D)/2 May 2002 |
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