
TCM320AC46
GENERALPURPOSE AUDIO INTERFACE FOR DSP
SLWS001 D4091, JUNE 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
HOUSTON, TEXAS 77001
11
transmit gain and dynamic range, companded or linear mode,
-law or A-law, VCC = 5 V, TA = 25°C (unless
otherwise noted) (see Notes 5 and 6)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
Transmit reference-signal level (0 dB) (see Note 7)
Linear mode selected
1.001
Vrms
Transmit reference-signal level (0 dB) (see Note 7)
Companded mode selected,
-law
0.982
Vrms
Overload-signal level
Linear mode selected
4
VPP
Overload-signal level
Companded mode selected,
-law
4
VPP
Absolute gain error
0-dB input signal
±2
dB
MICIN to DOUT at 3 dBm0 to 40 dBm0
±0.8
Gain error with input level relative to gain at 10 dB
MICIN to DOUT at 41 dBm0 to 50 dBm0
±2
dB
Gain error with input level relative to gain at 10 dB
MICIN to DOUT at 51 dBm0 to 55 dBm0
±2.5
dB
Gain variation
VCC ± 10%,
TA = 0°C to 70°C
±0.5
dB
transmit filter transfer, linear mode or
-law 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
Input signal = 50 Hz
10
0
Input signal = 200 Hz
1.8
0
Gain relative to input signal gain at
Input amplifier set for unity gain,
Input signal = 300 Hz to 3 kHz
±0.35
Gain relative to input signal gain at
1.02 kHz
Input amplifier set for unity gain,
noninverting maximum gain output signal
Input signal = 3.3 kHz
0.55
0.2
dB
1.02 kHz
noninverting maximum gain output signal
at MICIN is 0 dB
Input signal = 3.4 kHz
2.8
0
dB
Input signal = 4 kHz
11
Input signal
≥4.6 kHz
30
transmit idle channel noise and distortion, companded mode,
-law, over recommended ranges of supply
voltage and operating free-air temperature (see Note 8)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
Transmit noise, C-message weighted
MICIN connected to MICGS through a 10-k
resistor
27
dBrnC0
MICIN to DOUT at 0 dBm0 to 30 dBm0
32
Transmit signal-to-distortion ratio with sine-wave input
MICIN to DOUT at 31 dBm0 to 40 dBm0
25
dB
Transmit signal-to-distortion ratio with sine-wave input
MICIN to DOUT at 41 dBm0 to 45 dBm0
18
dB
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-k
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
Transmit signal-to-distortion ratio with sine-wave input
MICIN to DOUT at 19 dBm0 to 24 dBm0
30
dB
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
Vrms is equivalent to 74 dB (referenced to device 0-dB level).