am79d2251 Advanced Micro Devices, am79d2251 Datasheet - Page 17

• Manufacturer Part Number: am79d2251
• Description: Dual Intelligent Subscriber Line Audio-processing Circuit Islac
• Manufacturer: Advanced Micro Devices

Transmission and Signaling Specifications
No.
No.
A-law digital mW or equivalent (0 dBm0)
±5,800 peak linear coded sine wave
10
11
12
28
1
2
3
4
5
6
7
8
9
-law digital mW or equivalent (0 dBm0)
Insertion Loss
A-D
D-A
A-D + D-A
A-D + D-A
Level set error (Error between
setting and actual value)
DR to DX gain in full digital
loopback mode
Idle Channel Noise,
Psophometric Weighted (A-law)
Idle Channel Noise,
C Message weighted (µ-law)
Coder Offset decision value, Xn
GX step size
GR step size
PSRR (VCC)
Image frequency
DISN gain accuracy
End-to-end group delay
Crosstalk
same channel
Capacitance load on XSB1–2, XSC
Table 1. 0 dBm0 Voltage Definitions with Unity Gain in X, R, GX, GR, AX, and AR
Signal at Digital Interface
Item
Item
TX to RX
RX to TX
Input: 1014Hz, –10dBm0
RG = AR = AX = GR = GX = 0 dB,
AISN, R, X, B and Z filters disabled
Temperature = 70 C
Variation over temperature
A-D AX + GX
D-A AR + GR
DR Input: 1014 Hz, –10 dBm0
RG=AR=AX=GR=GX=0 dB,
DISN, R, X, B and Z filters disabled
Off-hook and On-hook
AX = 0dB
AR = 0dB
A-D (PCM output)
D-A (V
Off-hook and On-hook
AX = 0dB
AR = 0dB
A-D (PCM output)
D-A (V
A-D, Input signal = 0V
0
–12
Input: 4.8 to 7.8 kHz, 200 mV p-p
Measure 8000 Hz-Input frequency
A-D
D-A
Gdisn = ±0.9375 Vin = 0 dBm0
Gdisn = –0.9375 to 0.9375
1014 Hz; –10 dBmO
B = Z = 0; X = R = 1
0 dBm0
0 dBm0
GX < 12 dB
GR
OUT
OUT
)
)
Condition
0 dB
Condition
Am79D2251
300 Hz to 3400 Hz
300 Hz to 3400 Hz
Transmit
0.5026
0.4987
0.5026
Min
–0.25
–0.25
–0.15
–0.25
Min
–0.1
–0.1
–0.3
–7
37
37
Typ
0
0
0
0
Typ
Receive
0.4987
0.5025
0.5026
+0.015
Max
+0.25
+0.25
+0.25
–75
–75
+0.1
+0.3
–69
–78
+19
+12
525
0.1
0.1
0.1
+7
Max
400
dBrnC0
dBm0p
dBm0
Unit
Bits
dB
dB
dB
S
Unit
pF
Unit
Vrms
Note
Note
13,
12,
11
11
5
6
5
5
5
5
2
5
17