TCM8000 TI | Alldatasheet

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CELLULAR TELEPHONE AUDIO PROCESSOR SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Copyright  1993, Texas Instruments Incorporated

  • Switchable AMPS/TACS and NMT Operation
  • Integrated RX and TX Voice Filters
  • Integrated RX and TX Data Filters
  • Narrow-Band RX SAT Filter
  • Pre-Emphasis and De-Emphasis Filtering
  • CCITT-Compatible Compandor
  • Adjustable TX and RX Limiters
  • Loudspeaker Driver
  • Microphone Preamplifiers
  • Digitally Controlled Gains and Signal Muting
  • Low Power
  • Standby Mode
  • Simple 3-Wire Digital Interface
  • Low External Component Count
  • Single 5-V Supply
  • 44-Pin PLCC Package and Thin Quad Flat Pack

description

Implemented in advanced LinBiCMOS  technology, the TCM8000 audio processor provides a highly integrated solution for voice- band signal processing in FM cellular mobile and hand-portable telephones. The device incorporates the necessary voice and data filters as well as ancillary functions, such as microphone preamplifiers, a loudspeaker driver, and a CCITT- compatible compandor circuit. A simple 3-wire serial interface provides digital control over signal path switching, muting, and gain adjustment. The filter responses can be switched to suit Advanced Mobile Phone System/Total Access Communication System (AMPS/TACS) and Nordic Mobile Telephone (NMT) system requirements. Switched-capacitor techniques are used to implement the filtering functions, and appropriate antialiasing and smoothing filters are incorporated in the device. In the active mode, the TCM8000 uses less than 14 mA of supply current and can be set into a standby configuration, which reduces the supply current to less than 4 mA. The TCM8000 is characterized for operation from –25°C to 80°C. Caution. These devices have limited built-in protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. LIMIN POUT TXLIM TXVI CMPR CO CVE CTC CIN TXVO TDI 18 19 DAC RXLIM RXDO HSO HFO ST CTI RXVI EXO EXIN ETC 20 21 22 23 FN PACKAGE (TOP VIEW) LOAD PSO TXSUM TXO 54 3 2164 4 DCLK DATA RXO REF V V V M1N M2P M2N M2O RXIN GND XT1 XT0 TXDA M1O M1P 42 41 4043 24 25 26 27 28 CC BTX BRX M20 M2N M2P M1N M1P M1O TXDA XT0 XT1 GND RXIN 12 13 TXO TXSUM PSO LOAD VBTX VCC VBRX REF RXO DATA DCLK 14 15 16 17 FR PACKAGE (TOP VIEW) CTC CIN TXVO TDI 43 42 41 40 3944 38 LIMIN POUT TXLIM TXVI RXVI EXO EXIN ETC DAC RXDO HSO HFO ST CTI 36 35 3437 18 19 20 21 22 CMPR CO CVE RXLIM PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. LinBiCMOS is a trademark of Texas Instruments Incorporated.

CELLULAR TELEPHONE AUDIO PROCESSOR SCT041A – D4086, AUGUST 1992 – REVISED APRIL 1993

2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265•

±4 dB RXBP Filter –6 dB Expander EBP RXSW Volume Control ±15 dB LSSW Receive Data Filter SAT Filter SATTRIM –0 dB/7dB DAC Transmit Data Filter MICSW MICTRIM ± 4 dB TDSW CBP TXLP1 Filter 6 dB Limiter TXSW TXTRIM ± 4 dBDATA LOAD Compressor OSC TXLP2 Filter 6 dB RXO EXIN ETC EXO RXVI CTI RXLIM ST 41 131 RXIN VCC REF GND VBRX VBTX TXDA M1O M1P M1N M2P M2N M2O CIN CVE CTC CMPR TXVI TXLIM POUT LIMIN TXSUM HSO HFO RXDO DAC PSO XT0 XT1 TXO CO TDI TXVO 36Digital Control 31 33 32 35 34 37 41 41 6 1 7 1 51 4 1 3 8 1 2 Σ Σ Pin numbers shown are for the FN package.

CELLULAR TELEPHONE AUDIO PROCESSOR SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 Terminal Functions PIN NAME NO. I/O DESCRIPTION NAME FN FR CIN 31 36 I Compressor analog input CMPR 35 40 I Compressor rectifier analog input CO 34 39 O Compressor analog output. CO should be ac coupled to TXVI and to CMPR. CTC 32 27 O Compressor time constant control, analog output. A 220-nF capacitor should be connected between CTC and GND. CTI 13 18 I Call tone analog input. Signals on CTI are summed into the receive voice path prior to the volume control circuit. CTI can be muted under control of the serial interface. CVE 33 38 I Compressor virtual earth, analog input DAC 7 12 O Digital-to-analog converter output, programmable between GND and VCC /2 in sixteen steps DATA 5 10 I Serial interface digital data input DCLK 6 11 I Serial interface digital clock input ETC 17 22 O Expander time constant control, analog output. A 220-nF capacitor should be connected between ETC and GND. EXIN 16 21 I Expander analog input EXO 15 20 O Expander analog output. EXO should be ac coupled to RXVI. GND 19 24 Ground HFO 11 16 O Normal drive receiver voice analog output HSO 10 15 O High drive receiver voice analog output LIMIN 39 44 I Transmit limiter analog input LOAD 43 4 I Serial interface load, digital input. Data shifted into DATA under control of DCLK is transferred to internal registers when LOAD goes high. M1N 25 30 I Preamplifier 1 negative analog input M1O 23 28 O Preamplifier 1 analog output M1P 24 29 I Preamplifier 1 positive analog input M2N 27 32 I Preamplifier 2 negative analog input M2O 28 33 O Preamplifier 2 analog output M2P 26 31 I Preamplifier 2 positive analog input POUT 38 43 O Preemphasis filter analog output. POUT should be ac coupled to LIMIN. PSO 42 3 O Analog output of SAT filter REF 3 8 Unbuffered midsupply voltage, nominal output VCC /2 RXDO 9 14 O Receive data filter analog output RXIN 18 23 I Receive analog input RXLIM 8 13 I/O Receive limiter adjust voltage, controls maximum signal output on HSO. The dc input is between GND and VCC /2. RXO 4 9 O Receive voice filter analog output RXVI 14 19 I Receive voice analog input to volume control circuit. RXVI can be muted under control of the serial interface. ST 12 17 I Side tone analog input. Signals on this terminal are summed into the HSO output signal. TDI 29 34 I Tone of DTMF analog input. Signals on this terminal can be used in place of the main voice signal in the TX path and summed into the RX voice path, under control of the serial interface. TXDA 22 27 I Transmit data analog input TXLIM 37 42 I Transmit-limiter level adjust, controls maximum signal level at TXO. The dc input is between GND and VCC /2. TXO 40 1 O Transmit section analog output TXSUM 41 2 I Transmit summing analog input. The signal on TXSUM is summed into the main TX output after all filter stages. TXSUM can be muted under control of the serial interface. TXVI 36 41 I Transmit voice analog input TXVO 30 35 O Transmit voice analog output. TXVO is the output from the preamplifier and microphone gain adjust sections. It should be ac coupled into the compressor input CIN. VBRX 2 7 Buffered midsupply voltage to receive sections, nominal output VCC /2

CELLULAR TELEPHONE AUDIO PROCESSOR SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 752654 Terminal Functions (continued) PIN NAME NO. I/O DESCRIPTION NAME FN FR VBTX 44 5 Buffered midsupply for all transmit sections, nominal output VCC /2 VCC 1 6 Most positive supply voltage, 5 V± 5% XT0,XT1 21,20 26,25 Crystal oscillator terminals for connection to 3.58-MHz crystal resonator detailed description – transmit path input conditioning A pair of uncommitted operational amplifiers is provided at the main audio signal input. These components can be configured using external resistors to adjust the gain as required to suit particular microphones and external preamplifiers. The TCM8000 has been designed to provide 100 mVrms at the outputs of the preamplifier at pins M1O and M2O. The switch MICSW allows the selection of either amplifier input for hands-free or handset microphones. A digitally controlled gain/attenuation block, MICTRIM, allows adjustment of the signal level into the compressor in sixteen 0.5-dB steps. A digitally controlled switch, TDSW, allows alternative signals from other sources such as audio or DTMF tones to be injected into the transmit signal path from TDI. The output of TDSW is ac coupled at TXVO through an external capacitor into the compressor. compressor The compressor provides a 2:1 dynamic range compression of its input signal, converting an input range of 60 dB to 30 dB at its output. The test circuit diagram (Figure 2) shows the external components required to set time constants and to limit gain under idle channel conditions. The envelope time constant is determined by the value of a capacitor attached to CTC with 220 nF providing attack time of 3 ms approximately and decay times of approximately 13 ms. The compressor can be bypassed under control of the serial interface. The output from this stage, CO, is externally ac coupled into the transmit filter at TXVI and into the compressor rectifier input at CMPR. TX filtering and limiter The transmit band limiter is located between a pair of band-pass filters. Filter TXF1 is located before the limiter and provides 6 dB per octave preemphasis; filter TXF2, located after the limiter, features a phase-equalized response to control overshoot. The frequency responses of TXF1 and TXF2 are switchable between 3 kHz and 3.4 kHz cut off to meet the requirements of AMPS/TACS and NMT systems, respectively. Frequency response templates and typical responses are shown in Figures 3 through 6. The limiter is provided to meet maximum deviation specifications, and the limit level is controlled by the dc voltage applied to TXLIM. The output signal from POUT is ac coupled into the limiter input to eliminate asymmetrical limiting that could arise as a result of dc offsets. output conditioning The voice output signal from TXLP2 is passed to a three-input summing circuit, whose other inputs come from the TX data path and from TXSUM. Each input to the summing circuit can be enabled or muted under control of the serial bus. The overall deviation level is controlled by a digitally controlled gain/attenuation block that provides sixteen 0.5-dB steps of output level adjustment. The transmit supervisory audio tone (SAT) is applied to TXSUM. TXSUM can also be used as an input for transmit data, allowing implementation of alternative data filtering and conditioning to that implemented on the TCM8000. transmit data Transmit data, which is voice-band FSK coded for NMT and wide-band Manchester coded for AMPS and TACS (8K-baud TACS, 10K-baud AMPS), is applied to TXDA. The signal is filtered by the TX DATA filter, whose response can be switched from a band-pass to a low-pass configuration to meet the requirements of NMT and AMPS/TACS, respectively. Frequency templates and typical responses are shown in Figures 7 and 8.

CELLULAR TELEPHONE AUDIO PROCESSOR SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 detailed description – receive path input conditioning The received demodulated signal is applied to RXIN and passes to a gain-adjust block that provides ± 4 dB of adjustment in sixteen 0.5-dB steps. At this point, the receive signal path is split into the voice path, the data path, and the supervisory audio-tone (SAT) path. receive voice filter The received voice signal is processed in the band-pass RXBP filter, whose response has been designed to meet the requirements of AMPS/TACS and NMT systems. The response incorporates the required 6-dB/octave de-emphasis. Frequency response templates and a typical response are shown in Figures 9 and 10. expander The expander implements a 2:1 dynamic range expansion of the signal at its input, EXIN. It is designed to produce 0-dB gain at 100 mVrms. Envelope attack and decay times are determined by a capacitor attached to ETC, with a value of 220 nF producing attack time of 3 ms and decay times of approximately 13 ms. The expander can be bypassed under control of the serial interface. receive summing circuit and volume control A 3-input summing circuit is provided, which takes as input the voice signal from the expander, audio tones from the TDI input, and a call-tone input applied to CTI. Each input can be enabled or muted under control of the serial interface. The output from this block is passed to the volume control, which provides ± 15 dB of output level control in sixteen 2-dB steps. output buffers Two output buffer circuits are provided. The buffer that drives HFO is capable of driving loads down to 10-kΩ impedance and is intended for use with an external speaker driver. The HSO buffer features a high-drive bipolar output stage that allows impedances of 500 Ω to be driven directly with low distortion. The HSO output path also incorporates a summing circuit to facilitate side-tone injection from the ST input and a limiter circuit, which allows maximum sound pressure levels to be determined. The limit level is controlled by the voltage applied to RXLIM. Selection between the HFO and HSO outputs is achieved via the serial interface. receive data path A switchable response filter is provided to condition receive data before it is output on RXDO. Frequency response templates and typical responses are shown in Figures 11 and 12 for AMPS/TACS and NMT, respectively. receive SAT path Received supervisory audio tones (SAT) are separated from the voice signal in a switchable response narrow-band filter. This filter has a center frequency of 6 kHz in the AMPS/TACS mode and 4 kHz in the NMT mode. The filter output is passed to a level-adjust circuit, which provides eight 1-dB steps of adjustment. The processed SAT signal is output on PSO. miscellaneous midsupply The analog midsupply, effectively signal ground, is derived from a resistive divider connected between VCC and GND to produce VCC /2 at REF. This voltage is buffered by a pair of low output impedance amplifiers to produce midrail supplies for the receive and transmit sections at BBRX and VBTX , respectively, with separate midrails used to minimize coupling between the receive and transmit circuits. REF, VBTX , and VBRX should be decoupled to ground with capacitors physically mounted as close to the device as possible. VBTX and VBRX directly control the 0-dB point of the compressor and expander, respectively, so it is important that a stable and well-regulated supply is provided to VCC .

A low-power crystal oscillator is provided to generate the master clock signal for the switched-capacitor filters. used. No external components except the crystal are required. to drive high-impedance loads. current consumption is reduced to less than 4 mA. Figure 1. Serial Interface Timing Diagram

Table 1. Register Definitions

1 X X X DA 3 DA 2 DA 1 DA 0 DAC control

CELLULAR TELEPHONE AUDIO PROCESSOR SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 752658 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: Voltage value is with respect to GND. recommended operating conditions MIN TYP MAX UNIT VCC Supply voltage 4.75 5 5.25 V VIH High-level input voltage 3.5 V VIL Low-level input voltage 0.8 V TA Operating free-air temperature –2 5 80 °C electrical characteristics over recommended operating temperature range, VCC = 5 V, fxtal = 3.58 MHz PARAMETER TEST CONDITIONS MIN MAX UNIT ICC Supply current Standby 4 mAICC Supply current Operating 14 mA IIH High-level input current VI = 5 V 10 µA IIL Low-level input current VI = 0 V 10 µA fclock Serial clock frequency, DCLK 200 kHz Zi Input impedance, RXIN, RXVI, CTI, ST, TXVI, LIMIN, TXSUM, CIN, TXDA,f = 1 kHz 70 kΩZi EXIN, CMPR, TDI f = 1 kHz 20 kΩ Midsupply reference voltage, REF 2.4 2.6 V Buffered midsupply reference voltage, VBTX , VBRX 2.4 2.6 V Input current at M1P, M1N, M2P, M2N, RXLIM, TXLIM 1 µA transmit path specifications, VCC = 5 V, fxtal = 3.58 MHz M1/M2 to TXVO, MICTRIM, A1 and A2 configured as unity gain inverting amplifiers, input = 100 mVrms at 1 kHz at M1 or M2 (see Table 1) PARAMETER MIN MAX UNIT Gain, MICTRIM = <1000> ± 1 dB Step size 0.4 0.6 dB Positive range 3 4 dB Negative range –4.5 –3.5 dB

CELLULAR TELEPHONE AUDIO PROCESSOR SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 transmit path specifications, VCC = 5 V, fxtal = 3.58 MHz (continued) M1/M2 to TXO frequency response, NMT mode, TXLIM = 2.5 V, input = 20 mVrms, TXTRIM = <1000>, MICTRIM = <1000>, compressor bypassed (see Figures 3 and 4 and Table 1) PARAMETER TEST CONDITIONS MIN MAX UNIT Gain f = 1 kHz 11.5 13.5 dB f = 100 Hz –19 f = 300 Hz –13.1 –9.5 f = 500 Hz –7 –5 f = 2 kHz 5 7 Relative gain f = 3 kHz 7.7 10.5 dB f = 3.4 kHz 6.6 11.6 f = 3.94 kHz –40 f = 4.06 kHz –40 f = 10 kHz –16.5 M1/M2 to TXO frequency response, AMPS/TACS mode, TXLIM = 2.5 V, input = 20 mVrms, TXTRIM = <1000>, MICTRIM = <1000>, compressor bypassed (see Figures 5 and 6 and Table 1) PARAMETER TEST CONDITIONS MIN MAX UNIT Gain f = 1 kHz 11.5 13.5 dB f = 100 Hz –19 f = 300 Hz –13.1 –9.5 f = 500 Hz –7 –5 f = 2 kHz 5 7 Relative gain f = 2.75 kHz 6.8 9.8 dBRelative gain f = 3 kHz 5.5 10.5 dB f = 3.1 kHz 10.8 f = 5.9 kHz –25 f = 6.1 kHz –25 f = 10 kHz –19 TXSUM to TXO gain adjust, input = 100 mVrms at 1 kHz (see Table 1) PARAMETER MIN MAX UNIT Gain, TXTRIM = <1000> ± 1 dB Step size 0.4 0.6 dB Positive range 3 4 dB Negative range –4.5 –3.5 dB compressor gain characteristics, M1/M2 to TXO, f = 1 kHz, MICTRIM = <1000> (see Figure 2 for external components) PARAMETER TEST CONDITIONS MIN MAX UNIT Gain (reference) M1/M2 = 100 mVrms 11 13 dB M1/M2 = 100 mV+ 3 dB 1 2 Relative gain M1/M2 = 100 mV – 25 dB –13 –12 dB M1/M2 = 100 mV – 50 dB –25.5 –24.5 TX limiter, peak-to-peak output at TXO relative to nominal output, M1/M2 = 1 Vrms at 1 kHz, MICTRIM = <1000>, compressor enabled, nominal output measured at TXO for 100 mVrms input at M1/M2 PARAMETER TEST CONDITIONS MIN MAX UNIT TXLIM = 500 mV 1.25 TXLIM = 550 mV 1.35 Peak-to-peak output TXLIM = 600 mV 1.45 V/V TXLIM = 650 mV 1.55 TXLIM = 800 mV 1.85

CELLULAR TELEPHONE AUDIO PROCESSOR SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 7526510 transmit path specifications, VCC = 5 V, fxtal = 3.58 MHz (continued) total harmonic distortion at TXO vs TXLIM, M1/M2 = 100 mVrms at 1 kHz, MICTRIM = <1000>, TXTRIM = <1000>, compressor enabled PARAMETER TEST CONDITIONS MIN MAX UNIT TXLIM = 500 mV 10% Total harmonic distortion TXLIM = 550 mV 4%Total harmonic distortion TXLIM = 600 mV 1% TXLIM = 800 mV 1% noise at TXO, M1/M2 = VBTX , MICTRIM = <1000>, TXTRIM = <1000>, compressor enabled (see Table 1) PARAMETER MIN MAX UNIT Psophometrically-weighted rms noise 4 mV transmit path switch attenuation (see Table 1) PARAMETER TEST CONDITIONS MIN MAX UNIT MICSW, HSS = 0/1 50 TDSW, TTS = 0/1 50 Attenuation TXVOICE, TVM = 1 50 dBAttenuation TXSUM, TSM = 1 50 TXDATA, TDM = 1 50 TDI to TXO gain, TDI = 100 mVrms at 1 kHz, TXTRIM = <1000> (see Table 1) PARAMETER MIN MAX UNIT Gain 11 13 dB transmit data frequency response, NMT mode, TXDA = 275 mVrms, TXTRIM = <1000>(see Figure 7 and Table 1) PARAMETER TEST CONDITIONS MIN MAX UNIT Gain f = 1.5 kHz 2 4 dB f = 100 Hz –22 f = 700 Hz –7.6 –5.6 Relative gain f = 2.1 kHz 1.9 2.9 dBRelative gain f = 2.3 kHz 4.7 dB f = 3.5 kHz 4.7 f = 100 kHz –25 transmit data frequency response, AMPS/TACS mode, TXDA = 400 mVrms, TXTRIM = <1000>(see Figure 8 and Table 1) PARAMETER TEST CONDITIONS MIN MAX UNIT Gain f = 1 kHz ± 1 dB f = 8 kHz ± 1 Relative gain f = 16 kHz –6 1 dBRelative gain f = 30 kHz –18 dB f = 100 kHz –18 digital-to-analog converter, measured at DAC (see Table 1 for codes) PARAMETER MIN MAX UNIT Output code <0000> 50 mV Output code <1111>, relative VBRX –100 0 mV DNL, typical step size = 160 mV 0.5 LSB

CELLULAR TELEPHONE AUDIO PROCESSOR SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11 receive path specifications, VCC = 5 V, fxtal = 3.58 MHz RXIN to RXO, RXTRIM, RXIN = 100 mVrms at 1 kHz (see Table 1) PARAMETER MIN MAX UNIT Gain, RXTRIM = <1000> –7 –5 dB Step size 0.4 0.6 dB Positive range 3 4 dB Negative range –4.5 –3.5 dB RXIN to HFO/HSO frequency response, RXIN = 60 mVrms, RXTRIM = <1000>, VC = <1000>, expander bypassed (see Figures 9 and 10 and Table 1) PARAMETER TEST CONDITIONS MIN MAX UNIT Gain f = 1 kHz –7 –5 dB f = 100 Hz –30 f = 240 Hz 13.4 f = 300 Hz 7.9 11.5 f = 500 Hz 5 7 Relative gain f = 2 kHz –7 –5 dB f = 3 kHz –12 –8.5 f = 3.4 kHz –17 –9.6 f = 4 kHz –40 f = 10 kHz –40 CTI to HFO/HSO, volume control, CTI = 100 mVrms at 1 kHz (see Table 1) PARAMETER MIN MAX UNIT Gain, VC = <1000> 0 2 dB Step size 1.8 2.2 dB Positive range 13.5 14.5 dB Negative range –16.5 –15.5 dB ST/TDI to HFO/HSO gain, ST/TDI = 100 mVrms at 1 kHz, VC = <1000> (see Table 1) PARAMETER MIN MAX UNIT Gain ST to HSO –7 –5 dB Gain to TDI to HSO/HFO ± 1 dB expander gain characteristics, RXIN to HSO/HFO, f = 1 kHz, RXTRIM = <1000>, VC = <1000> (see Figure 2) PARAMETER TEST CONDITIONS MIN MAX UNIT Gain (reference) RXIN = 200 mVrms ± 1 dB RXIN = 200 mV + 3 dB 2 4 Expanded relative gain RXIN = 200 mV – 12.5 dB –13.5 –11.5 dB RXIN = 200 mV – 25 dB –23 –21 RX limiter, peak-to-peak output at HSO vs RXLIM, RXIN = 500 mVrms at 1 kHz, RXTRIM = <1000>, VC = <1000>, expander enabled PARAMETER TEST CONDITIONS MIN MAX UNIT RXLIM = 750 mV 1.6 Peak-to-peak output RXLIM = 850 mV 1.8 VPP RXLIM = 950 mV 2

CELLULAR TELEPHONE AUDIO PROCESSOR SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 7526512 receive path specifications, VCC = 5 V, fxtal = 3.58 MHz (continued) noise and distortion at HFO/HSO, RXTRIM = <1000>, VC = <1000>, expander enabled (see Table 1) PARAMETER MIN MAX UNIT Psophometrically-weighted rms noise, RXIN = VBRX 1 mV Total harmonic distortion, RXIN = 200 mV rms at 1 kHz 1% receive path switch attenuation (see Table 1) PARAMETER TEST CONDITIONS MIN MAX UNIT CTI, CTM = 1 50 Attenuation TDI, RTM = 1 50 dB Attenuation RXVOICE, RVM = 1 50 dB LSSW, HSS = 0/1 50 receive data frequency response, NMT mode, RXIN = 100 mVrms, RXTRIM = <1000> (see Figure 11 and Table 1) PARAMETER TEST CONDITIONS MIN MAX UNIT Gain f = 1.5 kHz 8 10 dB f = 100 Hz –10 f = 600 Hz 5.4 Relative gain f = 800 Hz 3.4 5.4 dBRelative gain f = 900 Hz 3.4 5.4 dB f = 10 kHz –15.5 receive data frequency response, AMPS/TACS mode, RXIN = 100 mVrms, RXTRIM = <1000> (see Figure 12 and Table 1) PARAMETER TEST CONDITIONS MIN MAX UNIT Gain f = 1 kHz 5 7 dB f = 8 kHz ± 1 Relative gain f = 16 kHz –6 1 dBRelative gain f = 40 kHz –18 dB f = 100 kHz –18 receive SAT path frequency response, NMT mode, RXIN = 100 mVrms, RXTRIM = <1000>, SATTRIM = <100> (see Figure 13 and Table 1) PARAMETER TEST CONDITIONS MIN MAX UNIT Gain f = 4 kHz 3 5 dB f = 100 Hz –35 f = 2 kHz –35 f = 3.2 kHz –25 f = 3.4 kHz –20 f = 3.8 kHz –5 0.5 Relative gain f = 3.94 kHz ± 0.5 dB f = 4.06 kHz ± 0.5 f = 4.2 kHz –5 0.5 f = 5 kHz –20 f = 6 kHz –35 f = 10 kHz –35

CELLULAR TELEPHONE AUDIO PROCESSOR SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 13 receive path specifications, VCC = 5 V, fxtal = 3.58 MHz (continued) receive SAT path frequency response, AMPS/TACS mode, RXIN = 100 mVrms, RXTRIM = <1000>, SATTRIM = <100> (see Figure 15 and Table 1) PARAMETER TEST CONDITIONS MIN MAX UNIT Gain f = 6 kHz 3 5 dB f = 100 Hz –35 f = 3 kHz –35 f = 4.8 kHz –25 f = 5.1 kHz –20 f = 5.8 kHz –5 0.5 Relative gain f = 5.94 kHz ± 0.5 dB f = 6.06 kHz ± 0.5 f = 6.2 kHz –5 0.5 f = 7.5 kHz –20 f = 9 kHz –35 f = 10 kHz –35 receive SAT path trim, SATTRIM, RXIN = 100 mVrms, f at 4 kHz NMT, f at 6 kHz AMPS/TACS, RXTRIM = <1000> (see Table 1) PARAMETER MIN MAX UNIT Gain, SATTRIM = <100> 3 5 dB Step size 0.8 1.2 dB Positive range 2.5 3.5 dB Negative range –4.5 –3.5 dB

14 POST OFFICE BOX 655303 DALLAS, TEXAS 75265•

3 Places

Pin numbers shown are for the FN package only. Figure 2. Test Circuit

CELLULAR TELEPHONE AUDIO PROCESSOR SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 7526518 TYPICAL CHARACTERISTICS † – 30 – 40 – 50 – 60 0 2000 4000 6000 – 20 – 10 8000 10000 – 4 – 5 – 7 – 8 – 9 – 6 5500 5700 5900 6100 – 2 – 3 6300 6500 RX SAT FREQUENCY RESPONSE – AMPS/TACS f – Frequency – Hz Relative Gain – dB Relative Gain – dB RX PASS-BAND DETAIL – AMPS/TACS f – Frequency – Hz Figure 15 Figure 16 † The boundaries of the shaded areas represent the frequency response limits met by the TCM8000. The curves in the unshaded areas represent the filter response of the device.

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