am79r251 Advanced Micro Devices, am79r251 Datasheet - Page 19

• Manufacturer Part Number: am79r251
• Description: Intelligent Subscriber Line Interface Circuit Islic
• Manufacturer: Advanced Micro Devices

Am79R251 Transmission Specifications
No.
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
RSN input impedance
VTX output impedance
Max, AC + DC loop current
Input impedance, A or B to GND
2-4 wire gain
2-4 wire gain variation with
frequency
2-4 wire gain tracking
4-2 wire gain
4-2 wire gain variation with
frequency
4-2 wire gain tracking
Total harmonic distortion level
2-wire
4-wire
4-wire overload level at VTX
Idle channel noise
C-message
Weighted
Psophometric
Weighted
Longitudinal balance
(IEEE method)
Normal Polarity
Reverse Polarity
PSRR (VBH, VBL, VBP)
PSRR (VCC)
Longitudinal AC current per wire
Metering distortion
Item
f = 300 to 3400 Hz
Active High Battery or Active
Low Battery
Active mode
–10 dBm, 1 kHz, 0 to 70°C
T
300 to 3400 Hz, relative to 1 kHz
T
+3 dBm to –55 dBm
Reference: –10 dBm
T
–10 dBm, 1 kHz
T
300 to 3400 Hz, relative to 1 kHz
+3 dBm to –55 dBm
Reference: –10 dBm
300 Hz to 3400 Hz
0 dBm
11.2 dBm
–12 dBm
-0.8 dBm
RLOAD = 600
Active modes, R
2-wire
T
4-wire
2-wire
T
4-wire
L - T
T
T
T - L
L - T, IL = 0 50 to 3400 Hz
L - T
T
3.4 to 50 kHz
50 to 3400 Hz
3.4 to 50 kHz
F = 15 to 60 Hz Active mode
Freq = 12 kHz 2.8 Vrms
Freq = 16 kHz
metering load = 200
50 to 3400 Hz
A
A
A
A
A
A
A
A
A
=–40°C to 85°C
= –40°C to 85°C
= –40°C to 0°C/70°C to 85°C
= –40°C to 0°C/70°C to 85°C
= –40°C to 0°C/70°C to 85°C
= –40 to 85°C
= –40 to 85°C
= –40 to 85°C
= –40°C to 85°C
Condition
200 to 1000 Hz
1000 to 3400 Hz
Am79R251
200 to 3400 Hz
200 to 1000 Hz
L
= 600
–14.13
–14.18
–0.15
–0.1
–0.1
–0.1
–0.1
Min
70
58
53
53
48
40
50
48
25
25
20
–13.98
–13.98
TBD
TBD
TBD
TBD
Typ
–83
–97
70
±1
+7
–7
63
58
63
45
40
45
35
30
40
1
3
0
–13.83
–13.78
+0.15
Max
+0.1
+0.1
+0.1
135
–50
–40
–48
–38
+11
–79
+.1
mArms
dBrnC
dBmp
Unit
mA
dB
dB
dB
dB
dB
Vp
dB
dB
2, 3, 5
2, 3, 5
Note
4, 5
4, 5
3
3
6
6
3
3
3
4
3
3
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