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參數(shù)資料
| 型號： | AM79Q062JC |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 編解碼器 |
| 英文描述： | A/MU-LAW, PCM CODEC, PQCC32 |
| 封裝： | PLASTIC, LCC-32 |
| 文件頁數(shù)： | 8/95頁 |
| 文件大?。?/td> | 1399K |
| 代理商： | AM79Q062JC |
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16
Am79Q06/061/062/063 Data Sheet
Transmission Characteristics
Table 1. dBm0 Voltage Definitions with Unity Gain in X, R, GX, GR, AX, and AR
When relative levels (dBm0) are used in the following transmission specifications, the specification holds for any setting of the AX
+ GX gain from 0–12 dB and the AR + GR loss from 0–12 dB.
Notes:
2. 0 dBm0 input signal, 300 Hz to 3400 Hz; measurement at any other frequency, 300 Hz to 3400 Hz.
3. No single frequency component in the range above 3800 Hz may exceed a level of –55 dBm0.
4. The weighted average of the crosstalk is defined by the following equation, where C(f) is the crosstalk in dB as a function of
frequency, fN = 3300 Hz, f1 = 300 Hz, and the frequency points (fj, j = 2..N) are closely spaced:
5. The End-to-End Group Delay is the sum of the transmit and receive group delays (measured using same time and clock slot).
6. Typical values not tested in production.
Signal at Digital Interface
Transmit
Receive
Unit
A-law digital mW or equivalent (0 dBm0)
0.7804
Vrms
-law digital mW or equivalent (0 dBm0)
0.7746
±22,827 peak linear coded sine wave
0.7804
Description
Test Conditions
Min
Typ
Max
Unit
Note
Gain accuracy D/A or A/D
0 dBm0, 1014 Hz
AX = AR = 0 dB
0 to 85°C
–40°C
AX = +6.02 dB and /or
AR = –6.02 dB
0 to 85°C
–40°C
–0.25
–0.30
–0.40
+0.25
+0.30
+0.40
dB
Gain accuracy digital-to-digital
–0.25
+0.25
Gain accuracy analog-to-analog
–0.25
+0.25
Attenuation distortion
300 Hz to 3 kHz
–0.125
+0.125
1
Single frequency distortion
–46
2
Idle channel noise
Analog out
Digital out
Digital looped back
weighted
unweighted
Digital input = 0
A-law
Digital input = 0
-law
Analog VIN = 0 VAC
A-law
Analog VIN = 0 VAC
-law
0
–68
–55
–78
12
–68
16
dBm0p
dBm0
dBm0p
dBrnc0
dBm0p
dBrnc0
3
3, 6
3
3, 6
Crosstalk same channel
TX to RX
RX to TX
0 dBm0300 Hz to 3400 Hz
–75
dBm0
Crosstalk between channels
TX or RX to TX
TX or RX to RX
0 dBm0
1014 Hz, Average
–76
–78
4
End-to-end group delay
B = Z = 0; X = R = 1
678
s
5
Average
20
10
1
20
------
Cf
j
()
10
1
20
------
Cf
j1
–
()
+
2
------------------------------------------------------------------------------
f
j
f
j1
–
------------
log
j
∑
f
N
f
1
------
log
---------------------------------------------------------------------------------------------------------------------------
log
=
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