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TLV320AC56DW Datasheet(PDF) 7 Page - Texas Instruments

Part # TLV320AC56DW
Description  3-V VOICE-BAND AUDIO PROCESSORS VBAPE
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TLV320AC56DW Datasheet(HTML) 7 Page - Texas Instruments

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TLV320AC56, TLV320AC57
3-V VOICE-BAND AUDIO PROCESSORS (VBAP
™)
SLWS044B – JUNE 1996 – REVISED OCTOBER 1997
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
transmit gain and dynamic range, companded mode (
µ-law or A-law) or linear mode selected, VCC = 3 V,
TA = 25°C (unless otherwise noted) (see Notes 5 and 6)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
Companded mode selected,
µ-law (’AC56)
0.614
Transmit reference-signal level (0 dB) (see Note 7)
Companded mode selected, A-law (’AC57)
0.616
Vrms
Linear mode selected (’AC56 and ’AC57)
0.626
Companded mode selected,
µ-law (’AC56)
2.5
Overload-signal level (MICIN at unity gain)
Companded mode selected, A-law (’AC57)
2.5
Vpp
Linear mode selected (’AC56 and ’AC57)
2.5
Absolute gain error
0-dB input signal
±1
dB
MICIN to DOUT at 0 dBm0 to – 40 dBm0
±0.5
Gain error with input level relative to gain at –10 dBm0
MICIN to DOUT at – 41 dBm0 to – 50 dBm0
±1.5
dB
MICIN to DOUT at – 51 dBm0 to – 55 dBm0
±2
Gain variation
VCC ± 10%, TA = 0°C to 70°C
±0.5
dB
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. The reference-signal level, which is input to the transmit channel, is defined as a value 3 dB below the full-scale value of 2 V.
transmit filter transfer, companded mode (
µ-law or A-law) or linear mode selected, over recommended
ranges of supply voltage and free-air temperature, CLK = 2.048 MHz, FSX = 8 kHz (see Note 6)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
fMICIN = 50 Hz
–10
0
fMICIN = 200 Hz
–2.8
0
Input amplifier set for unity gain,
fMICIN = 300 Hz to 3 kHz
±0.25
Gain relative to input signal gain at 1.02 kHz
In ut am lifier set for unity gain,
noninverting maximum gain output
i
l
MICIN i
dB
fMICIN = 3.3 kHz
– 0.55
0.2
dB
signal at MICIN is 0 dB
fMICIN = 3.4 kHz
–1
– 0.1
fMICIN = 4 kHz
–14
fMICIN ≥ 4.6 kHz
–32
NOTE 6. The input amplifier is set for inverting unity gain.
transmit idle channel noise and distortion, companded mode with
µ-law or A-law selected, over
recommended ranges of supply voltage and operating free-air temperature (see Note 8)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
Transmit noise, psophometrically weighted
MICIN connected to MICGS through a 10-k
Ω resistor
–72
dBm0p
Transmit noise, C-message weighted
MICIN connected to MICGS through a 10-k
Ω resistor
10
dBrnC0
MICIN to DOUT at 0 dBm0 to – 24 dBm0
36
MICIN to DOUT at –25 dBm0 to – 30 dBm0
34
Transmit signal-to-distortion ratio with sine-wave input
MICIN to DOUT at – 31 dBm0 to – 38 dBm0
30
dB
MICIN to DOUT at – 39 dBm0 to – 40 dBm0
24
MICIN to DOUT at – 41 dBm0 to – 45 dBm0
20
Intermodulation distortion, 2-tone CCITT method,
CCITT G.712 (7.1), R2
49
dB
composite power level –13 dBm0
CCITT G.712 (7.2), R3
51
dB
NOTE 8: Transmit noise, linear mode: 200
µVrms is equivalent to –74 dB (referenced to device 0-dB level).


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