TCM8000 Datasheet, PDF (9/19 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)
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
f = 3 kHz
6.8 9.8
dB
5.5 10.5
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
Gain, TXTRIM = <1000>
Step size
Positive range
Negative range
MIN
0.4
3
– 4.5
MAX
±1
0.6
4
– 3.5
UNIT
dB
dB
dB
dB
compressor gain characteristics, M1/M2 to TXO, f = 1 kHz, MICTRIM = <1000> (see Figure 2 for external
components)
Gain (reference)
Relative gain
PARAMETER
TEST CONDITIONS
M1/M2 = 100 mVrms
M1/M2 = 100 mV+ 3 dB
M1/M2 = 100 mV – 25 dB
M1/M2 = 100 mV – 50 dB
MIN
11
1
– 13
– 25.5
MAX
13
2
– 12
–24.5
UNIT
dB
dB
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
TXLIM = 500 mV
MIN MAX UNIT
1.25
Peak-to-peak output
TXLIM = 550 mV
TXLIM = 600 mV
TXLIM = 650 mV
TXLIM = 800 mV
1.35
1.45 V/V
1.55
1.85
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
9