TCM8000 Datasheet, PDF (10/19 Pages) Texas Instruments – CELLULAR TELEPHONE AUDIO PROCESSOR

TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
transmit path specifications, V_CC = 5 V, f_xtal = 3.58 MHz (continued)
total harmonic distortion at TXO vs TXLIM, M1/M2 = 100 mVrms at 1 kHz, MICTRIM = <1000>,
TXTRIM = <1000>, compressor enabled
Total harmonic distortion
PARAMETER
TEST CONDITIONS
TXLIM = 500 mV
TXLIM = 550 mV
TXLIM = 600 mV
TXLIM = 800 mV
MIN MAX
10%
4%
1%
1%
UNIT
noise at TXO, M1/M2 = V_BTX, 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
Attenuation
TEST CONDITIONS
MICSW, HSS = 0/1
TDSW, TTS = 0/1
TXVOICE, TVM = 1
TXSUM, TSM = 1
TXDATA, TDM = 1
MIN MAX UNIT
50
50
50
dB
50
50
TDI to TXO gain, TDI = 100 mVrms at 1 kHz, TXTRIM = <1000> (see Table 1)
PARAMETER
Gain
MIN MAX UNIT
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
f = 2.3 kHz
1.9 2.9
dB
4.7
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)
Gain
Relative gain
PARAMETER
TEST CONDITIONS
f = 1 kHz
f = 8 kHz
f = 16 kHz
f = 30 kHz
f = 100 kHz
MIN MAX UNIT
± 1 dB
±1
–6
1
dB
– 18
– 18
digital-to-analog converter, measured at DAC (see Table 1 for codes)
PARAMETER
Output code <0000>
Output code <1111>, relative VBRX
DNL, typical step size = 160 mV
MIN
– 100
MAX
50
0
0.5
UNIT
mV
mV
LSB
10
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