TCM320AC36 Datasheet, PDF (8/23 Pages) Texas Instruments – VOICE-BAND AUDIO PROCESSORS VBAPE

TCM320AC36, TCM320AC37
VOICE-BAND AUDIO PROCESSORS (VBAP™)
SLWS003C – MAY 1992 – REVISED APRIL – 1998
transmit idle channel noise and distortion, linear mode selected, over recommended ranges of supply
voltage and operating free-air temperature (see Notes 6 and 8)
PARAMETER
TEST CONDITIONS
Transmit noise, C-message weighted
MICIN connected to MICGS through a 10-kΩ resistor
MICIN to DOUT at – 6 dBm0
MICIN to DOUT at – 12 dBm0
MICIN to DOUT at – 18 dBm0
Transmit signal-to-distortion ratio with sine-wave input
MICIN to DOUT at – 24 dBm0
MICIN to DOUT at – 40 dBm0
MICIN to DOUT at – 45 dBm0
NOTES: 6. The input amplifier is set for inverting unity gain.
8. Transmit noise, linear mode: 200 µVrms is equivalent to –74 dB (referenced to device 0-dB level).
MIN MAX UNIT
200 µVrms
50
48
40
dB
35
20
18
receive gain and dynamic range, companded mode (µ-law or A-law) or linear mode selected, V_CC = 5 V,
T_A = 25°C (unless otherwise noted) (see Notes 9 and 10)
PARAMETER
TEST CONDITIONS
MIN MAX UNIT
Companded mode selected, µ-law (’AC36)
0.736
Receive reference-signal level (0 dB) (see Note 11)
Companded mode selected, A-law (’AC37)
0.739 Vrms
Linear mode selected (’AC36 and ’AC37)
0.751
Companded mode selected, µ-law (’AC36)
3
Overload-signal level
Companded mode selected, A-law (’AC37)
3 Vpp
Linear mode selected (’AC36 and ’AC37)
3
Absolute gain error
0-dB input signal
± 1 dB
DIN to EARA and EARB at 3 dBm0 to – 36 dBm0
± 0.5
DIN to EARA and EARB at – 37 dBm0 to – 40 dBm0
Gain error with output level relative to gain at –10 dBm0
DIN to EARA and EARB at – 41 dBm0 to – 50 dBm0
±1
dB
± 1.5
DIN to EARA and EARB at – 51 dBm0 to – 55 dBm0
±2
Gain variation
VCC ±10%,
TA = 0°C to 70°C
± 0.5 dB
NOTES: 9. Receive output is measured differentially in the maximum gain configuration. To set the output amplifier for maximum gain, EARGS
is connected to EARB and the output is taken between EARA and EARB. All output levels are (sin x)/x corrected.
10. Unless otherwise noted, the digital input is a word stream generated by passing a 0-dB sine wave at 1020 Hz through an ideal
encoder, where 0 dB is defined as the zero reference.
11. This reference-signal level is measured at the speaker output of the receive channel with the gain of the output speaker amplifier
set to unity.
receive filter transfer, companded mode (µ-law or A-law) or linear mode selected, over recommended ranges
of supply voltage and operating free-air temperature, FSR = 8 kHz (see Note 9)
PARAMETER
TEST CONDITIONS
MIN MAX UNIT
fDIN = < 200 Hz
0.15
fDIN = 200 Hz
– 0.5 0.15
fDIN = 300 Hz to 3 kHz
± 0.15
Gain relative to gain at 1.02 kHz
DIN = 0 dBm0
fDIN = 3.3 kHz
– 0.35 0.03 dB
fDIN = 3.4 kHz
– 1 – 0.18
fDIN = 4 kHz
– 14
fDIN = > 4.6 kHz
– 30
NOTE 9. Receive output is measured differentially in the maximum gain configuration. To set the output amplifier for maximum gain, EARGS is
connected to EARB and the output is taken between EARA and EARB. All output levels are (sin x)/x corrected.
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