TCM8000 Datasheet, PDF (11/19 Pages) Texas Instruments – CELLULAR TELEPHONE AUDIO PROCESSOR

TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
receive path specifications, V_CC = 5 V, f_xtal = 3.58 MHz
RXIN to RXO, RXTRIM, RXIN = 100 mVrms at 1 kHz (see Table 1)
PARAMETER
Gain, RXTRIM = <1000>
Step size
Positive range
Negative range
MIN
–7
0.4
3
– 4.5
MAX
–5
0.6
4
– 3.5
UNIT
dB
dB
dB
dB
RXIN to HFO/HSO frequency response, RXIN = 60 mVrms, RXTRIM = <1000>, VC = <1000>, expander
bypassed (see Figures 9 and 10 and Table 1)
Gain
Relative gain
PARAMETER
TEST CONDITIONS
f = 1 kHz
f = 100 Hz
f = 240 Hz
f = 300 Hz
f = 500 Hz
f = 2 kHz
f = 3 kHz
f = 3.4 kHz
f = 4 kHz
f = 10 kHz
MIN MAX UNIT
– 7 – 5 dB
– 30
13.4
7.9 11.5
5
7
– 7 – 5 dB
– 12 – 8.5
– 17 – 9.6
– 40
– 40
CTI to HFO/HSO, volume control, CTI = 100 mVrms at 1 kHz (see Table 1)
PARAMETER
Gain, VC = <1000>
Step size
Positive range
Negative range
MIN
0
1.8
13.5
– 16.5
MAX
2
2.2
14.5
– 15.5
UNIT
dB
dB
dB
dB
ST/TDI to HFO/HSO gain, ST/TDI = 100 mVrms at 1 kHz, VC = <1000> (see Table 1)
PARAMETER
Gain ST to HSO
Gain to TDI to HSO/HFO
MIN MAX UNIT
– 7 – 5 dB
± 1 dB
expander gain characteristics, RXIN to HSO/HFO, f = 1 kHz, RXTRIM = <1000>, VC = <1000> (see Figure 2)
Gain (reference)
PARAMETER
TEST CONDITIONS
RXIN = 200 mVrms
RXIN = 200 mV + 3 dB
MIN MAX UNIT
± 1 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
Peak-to-peak output
PARAMETER
TEST CONDITIONS
RXLIM = 750 mV
RXLIM = 850 mV
RXLIM = 950 mV
MIN MAX UNIT
1.6
1.8 VPP
2
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