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AM79D2251VC Datasheet(PDF) 17 Page - Advanced Micro Devices

Part # AM79D2251VC
Description  Dual Intelligent Subscriber Line Audio-Processing Circuit (ISLAC)
PDF  35 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79D2251VC Datasheet(HTML) 17 Page - Advanced Micro Devices

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Am79D2251
17
Transmission and Signaling Specifications
Table 1. 0 dBm0 Voltage Definitions with Unity Gain in X, R, GX, GR, AX, and AR
28
Capacitance load on XSB1–2, XSC
400
pF
5
Signal at Digital Interface
Transmit
Receive
Unit
A-law digital mW or equivalent (0 dBm0)
0.5026
0.5026
Vrms
µ-law digital mW or equivalent (0 dBm0)
0.4987
0.4987
±5,800 peak linear coded sine wave
0.5026
0.5025
No.
Item
Condition
Min
Typ
Max
Unit
Note
1
Insertion Loss
A-D
D-A
A-D + D-A
A-D + D-A
Input: 1014Hz, –10dBm0
RG = AR = AX = GR = GX = 0 dB,
AISN, R, X, B and Z filters disabled
Temperature = 70
°C
Variation over temperature
–0.25
–0.25
–0.15
–0.1
0
0
0
0
+0.25
+0.25
+0.015
+0.1
dB
6
2
Level set error (Error between
setting and actual value)
A-D AX + GX
D-A AR + GR
–0.1
0.1
3
DR to DX gain in full digital
loopback mode
DR Input: 1014 Hz, –10 dBm0
RG=AR=AX=GR=GX=0 dB,
DISN, R, X, B and Z filters disabled
–0.3
+0.3
4
Idle Channel Noise,
Psophometric Weighted (A-law)
Off-hook and On-hook
AX = 0dB
AR = 0dB
A-D (PCM output)
D-A (VOUT)
–69
–78
dBm0p
11
5
Idle Channel Noise,
C Message weighted (µ-law)
Off-hook and On-hook
AX = 0dB
AR = 0dB
A-D (PCM output)
D-A (VOUT)
+19
+12
dBrnC0
11
6
Coder Offset decision value, Xn
A-D, Input signal = 0V
–7+7
Bits
5
7
GX step size
0
≤ GX < 12 dB
0.1
dB
5
8
GR step size
–12
≤ GR ≤ 0 dB
0.1
5
9
PSRR (VCC)
Image frequency
Input: 4.8 to 7.8 kHz, 200 mV p-p
Measure 8000 Hz-Input frequency
A-D
D-A
37
37
5
10
DISN gain accuracy
Gdisn = ±0.9375 Vin = 0 dBm0
Gdisn = –0.9375 to 0.9375
–0.25
+0.25
dB
2
11
End-to-end group delay
1014 Hz; –10 dBmO
B = Z = 0; X = R = 1
525
µS13,
12,
5
12
Crosstalk
TX to RX
same channel
RX to TX
0 dBm0
300 Hz to 3400 Hz
0 dBm0
300 Hz to 3400 Hz
–75
–75
dBm0
No.
Item
Condition
Min
Typ
Max
Unit
Note



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