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參數(shù)資料
| 型號： | AM79C30AVC |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | Digital Subscriber Controller⑩ (DSC⑩) Circuit |
| 中文描述： | DATACOM, DIGITAL SLIC, PQFP44 |
| 封裝： | PLASTIC, TQFP-44 |
| 文件頁數(shù)： | 71/101頁 |
| 文件大?。?/td> | 1607K |
| 代理商： | AM79C30AVC |
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Am79C30A/32A Data Sheet
71
Transmitter 0-dB Reference Point:
Nominal input voltage at AINA or AINB will produce a 0-dBm, 1-kHz digital code at the transmit output with all transmit gains at
0 dB.
A law = 625 mV rms
μ law = 620 mV rms
Receiver 0-dB Reference Point:
Nominal input voltage between EAR1/EAR2 or LS1/LS2 resulting from a 0-dBm, 1-kHz digital code at the receive input with all
receive gains at 0 dB.
A law = 1.25 mV rms
μ law = 1.2 mV rms
Table 54.
Codec Performance Specifications (Am79C30A only)
Parameter
Symbol
TXG
Parameter Descriptions
Test Conditions
Preliminary
Min
–0.50
Unit
Max
+0.50
Transmit absolute gain
0 dBm0; 1020 Hz; V
CC
= 5 V ±5%, TA
= 0°C–70°C; over all GA
0 dBm0; 1020 Hz; V
CC
= 5 V ±5%; TA
= 0°C–70°C; Rload = 540 ohms
0 dBm0; 1020 Hz; V
CC
= 5 V ±5%; TA =
0°C–70°C; Rload = 40 ohms
–10 dBm0
–45 dBm0
–10 dBm0
–45 dBm0
–45
dB
RXGE
Receive absolute gain at EAR1/EAR2
(nominal)
Receive absolute gain
–0.50
+0.50
dB
RXGL
–0.80
+0.80
dB
TXSTD
Transmit signal/total distortion; CCITT method
2, 1020 Hz (Tx gain = 0)
Receive signal/total distortion; CITT method 2,
1020 Hz (Rx gain = 0)
Transmit gain tracking; CCITT method 2, 1020
Hz (Tx gain = 0)
Receive gain tracking; CCITT method 2, 1020
Hz (Rx gain = 0)
Transmit Idle channel Noise AINA connected to
AREF
Receive Idle channel Noise
35
24
35
24
dB
RXSTD
dB
TXGT
–0.60
+0.60
dB
RXGT
–45
–0.60
+0.60
dB
TXICN
GX = 6 dB, GA = 18 dB
–66
dB
RXICN
Notes:
The following test conditions apply to all MAP tests:
GR = –12 dB, GER = 0 dB
–75
dB
1. An external 1-Kohm ± 5% resistor and 2200-pF ±10% capacitor are connected in series between the CAP1 and CAP2 pins
for all transmit tests.
2. All tests are half-channel with the sidetone path enabled but programmed for infinite attentuation (STG = 9008 hex).
3. Transmit specs are guaranteed for both AINA and AINB inputs with the auto-zero and high-pass filters enabled in MMR2.
4. Transmit specs are tested and guaranteed with the input signal source referenced to AREF; see test circuit below.
5. Receive specs are guaranteed for both EAR1/EAR2 and LS1/LS2 outputs measured differentially. Some degradation in
performance may occur if used single ended rather than differential.
0.1 μF
AINA or AINB
100K
AREF
~
Transmit Test Circuit with Input Source Referenced to AREF
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