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參數(shù)資料
| 型號(hào)： | TCM320AC37PT |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | VOICE-BAND AUDIO PROCESSORS VBAPE |
| 中文描述： | 語音頻帶音頻處理器VBAPE |
| 文件頁數(shù)： | 7/23頁 |
| 文件大?。?/td> | 317K |
| 代理商： | TCM320AC37PT |
TCM320AC36, TCM320AC37
VOICE-BAND AUDIO PROCESSORS (VBAP
)
SLWS003C – MAY 1992 – REVISED APRIL – 1998
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
transmit 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 5 and 6)
PARAMETER
Companded mode selected,
μ
-law (’AC36)
Transmit reference-signal level (0 dB) (see Note 7)
Companded mode selected, A-law (’AC37)
TEST CONDITIONS
MIN
MAX
0.982
UNIT
0.985
Vrms
Linear mode selected (’AC36 and ’AC37)
Companded mode selected,
μ
-law (’AC36)
Companded mode selected, A-law (’AC37)
1.001
4
Overload-signal level (MICIN at unity gain)
4
Vpp
Linear mode selected (’AC36 and ’AC37)
4
Absolute gain error
0-dB input signal
±
1
dB
MICIN to DOUT at 3 dBm0 to –36 dBm0
±
0.5
±
1
±
1.5
±
2
±
0.5
dB
Gain error with input level relative to gain at –10 dBm0
MICIN to DOUT at –37 dBm0 to –40 dBm0
MICIN to DOUT at –41 dBm0 to –50 dBm0
dB
MICIN to DOUT at –51 dBm0 to –55 dBm0
VCC
±
10%,
TA = 0
°
C to 70
°
C
dB
Gain variation
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
–10
MAX
UNIT
fMICIN = 50 Hz
fMICIN = 200 Hz
fMICIN = 300 Hz to 3 kHz
fMICIN = 3.3 kHz
fMICIN = 3.4 kHz
fMICIN = 4 kHz
fMICIN
≥
4.6 kHz
0
–1.8
0
Gain relative to input signal gain at
1.02 kHz
Input amplifier set for unity gain,
In ut am lifier set for unity gain,
noninverting maximum gain output signal
at MICIN is 0 dB
±
0.15
0.04
–0.35
dB
–1
–0.1
–14
–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
resistor
MICIN connected to MICGS through a 10-k
resistor
MICIN to DOUT at 0 dBm0 to –17 dBm0
–71
dB0p
Transmit noise, C-message weighted
10
dBrnC0
36
MICIN to DOUT at –18 dBm0 to –23 dBm0
34
Transmit signal-to-distortion ratio with sine-wave input
MICIN to DOUT at –24 dBm0 to –29 dBm0
30
dB
MICIN to DOUT at –30 dBm0 to –35 dBm0
24
MICIN to DOUT at –36 dBm0 to –45 dBm0
16
Intermodulation distortion, 2-tone CCITT method,
composite power level –13 dBm0
CCITT G.712 (7.1), R2
CCITT G.712 (7.2), R3
49
51
dB
NOTE 8: Transmit noise, linear mode: 200
μ
Vrms is equivalent to –74 dB (referenced to device 0-dB level).
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