TCM320AC46 Datasheet, PDF (12/19 Pages) Texas Instruments – GEBERAL-PURPOSE AUDIO INTERFACE FOR DSP

TCM320AC46
ą
GENERALĆPURPOSE AUDIO INTERFACE FOR DSP
ą
SLWS001 − D4091, JUNE 1993
receive gain and dynamic range, linear mode, µ-law or A-law, V_CC = 5 V, T_A = 25°C (unless otherwise noted)
(see Notes 9 and 10)
PARAMETER
Receive reference-signal level (0 dB) (see Note 11)
Overload-signal level
Absolute gain error
Gain error with output level relative to gain at −10 dBm0
Gain variation
TEST CONDITIONS
Linear mode selected
Companded mode selected, µ-law
Linear mode selected
Companded mode selected, µ-law
0-dB input signal
DIN to EARA and EARB at 3 dBm0 to − 40 dBm0
DIN to EARA and EARB at − 41 dBm0 to − 50 dBm0
DIN to EARA and EARB at − 51 dBm0 to − 55 dBm0
VCC ± 10%,
TA = 0°C to 70°C
MIN MAX
0.751
0.736
3
3
±2
± 0.8
±2
± 2.5
± 0.5
UNIT
Vrms
VPP
dB
dB
dB
receive filter transfer over recommended ranges of supply voltage and operating free-air temperature (see
Note 8)
PARAMETER
Gain relative to input signal gain at 1.02 kHz
TEST CONDITIONS
Input signal = < 200 Hz
Input signal = 200 Hz
Input signal = 300 Hz to 3 kHz
Input signal at DIN is 0 dBm0 Input signal = 3.3 kHz
Input signal = 3.4 kHz
Input signal = 4 kHz
Input signal > 4.6 kHz
MIN MAX
0.35
−0.8 0.35
± 0.35
−0.55 0.2
−2
0
− 11
− 28
UNIT
dB
receive idle channel noise and distortion, companded mode, µ-law, over recommended ranges of supply
voltage and operating free-air temperature (see Note 8)
PARAMETER
Receive noise, C-message weighted
Receive signal-to-distortion ratio with sine-wave input
TEST CONDITIONS
DIN = 11111111
DIN to EARA and EARB at 0 dBm0 to − 30 dBm0
DIN to EARA and EARB at − 31 dBm0 to − 40 dBm0
DIN to EARA and EARB at − 41 dBm0 to − 45 dBm0
MIN MAX UNIT
17 dBrnC0
32
25
dB
18
receive idle channel noise and distortion, linear mode over recommended ranges of supply voltage and
operating free-air temperature (see Note 8)
PARAMETER
TEST CONDITIONS
MIN MAX UNIT
Receive noise
DIN = 00000000(linear)
−60 dB
DIN to EARA and EARB at 0 dBm0 to − 6 dBm0
48
DIN to EARA and EARB at − 6 dBm0 to − 12 dBm0
42
Receive signal-to-distortion ratio with sine-wave input
DIN to EARA and EARB at − 13 dBm0 to − 18 dBm0
38
dB
DIN to EARA and EARB at − 19 dBm0 to − 24 dBm0
30
DIN to EARA and EARB at − 25 dBm0 to − 45 dBm0
14
NOTES: 8. Transmit noise, linear mode: 200 µVrms is equivalent to −74 dB (referenced to device 0-dB level).
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.
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