TCM320AC46 Datasheet, PDF (11/19 Pages) Texas Instruments – GEBERAL-PURPOSE AUDIO INTERFACE FOR DSP

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TCM320AC46
GENERALĆPURPOSE AUDIO INTERFACE FOR DSP
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SLWS001 − D4091, JUNE 1993
transmit gain and dynamic range, companded or linear mode, µ-law or A-law, V_CC = 5 V, T_A = 25°C (unless
otherwise noted) (see Notes 5 and 6)
PARAMETER
Transmit reference-signal level (0 dB) (see Note 7)
Overload-signal level
Absolute gain error
Gain error with input level relative to gain at −10 dB
Gain variation
TEST CONDITIONS
Linear mode selected
Companded mode selected, µ-law
Linear mode selected
Companded mode selected, µ-law
0-dB input signal
MICIN to DOUT at 3 dBm0 to − 40 dBm0
MICIN to DOUT at − 41 dBm0 to − 50 dBm0
MICIN to DOUT at − 51 dBm0 to − 55 dBm0
VCC ± 10%,
TA = 0°C to 70°C
MIN MAX UNIT
1.001
Vrms
0.982
4
4 ^VPP
± 2 dB
± 0.8
± 2 dB
± 2.5
± 0.5 dB
transmit filter transfer, linear mode or µ-law selected, over recommended ranges of supply voltage and
free-air temperature, CLK = 2.048 MHz, FSX = 8 kHz (see Note 6)
PARAMETER
Gain relative to input signal gain at
1.02 kHz
TEST CONDITIONS
Input signal = 50 Hz
Input signal = 200 Hz
Input amplifier set for unity gain,
noninverting maximum gain output signal
at MICIN is 0 dB
Input signal = 300 Hz to 3 kHz
Input signal = 3.3 kHz
Input signal = 3.4 kHz
Input signal = 4 kHz
Input signal ≥ 4.6 kHz
MIN MAX
−10
0
−1.8
0
± 0.35
−0.55 0.2
− 2.8
0
−11
− 30
UNIT
dB
transmit idle channel noise and distortion, companded mode, µ-law, over recommended ranges of supply
voltage and operating free-air temperature (see Note 8)
PARAMETER
Transmit noise, C-message weighted
Transmit signal-to-distortion ratio with sine-wave input
TEST CONDITIONS
MICIN connected to MICGS through a 10-kΩ resistor
MICIN to DOUT at 0 dBm0 to − 30 dBm0
MICIN to DOUT at − 31 dBm0 to − 40 dBm0
MICIN to DOUT at− 41 dBm0 to − 45 dBm0
MIN MAX UNIT
27 dBrnC0
32
25
dB
18
transmit idle channel noise and distortion, linear mode, over recommended ranges of supply voltage and
operating free-air temperature (see Notes 6 and 8)
PARAMETER
TEST CONDITIONS
MIN MAX UNIT
Transmit noise
MICIN connected to MICGS through a 10-kΩ resistor
−60 dB
MICIN to DOUT at 0 dBm0 to − 6 dBm0
47
MICIN to DOUT at − 7 dBm0 to − 12 dBm0
42
Transmit signal-to-distortion ratio with sine-wave input MICIN to DOUT at − 13 dBm0 to − 18 dBm0
38
dB
MICIN to DOUT at − 19 dBm0 to − 24 dBm0
30
MICIN to DOUT at − 25 dBm0 to − 45 dBm0
15
NOTES: 5. Unless otherwise noted, the analog input is 0 dB, 1020-Hz sine wave, where 0 dB is defined as the zero-reference point of the channel
under test.
6. The input amplifier is set for inverting unity gain.
7. This reference-level signal, which is input to the transmit channel, is defined as a value 3 dB below the full-scale value of 2 V.
8. Transmit noise, linear mode: 200 µVrms is equivalent to −74 dB (referenced to device 0-dB level).
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