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AM7945JC 数据表(PDF) 6 Page - Advanced Micro Devices

部件名 AM7945JC
功能描述  Subscriber Line Interface Circuit
PDF  18 Pages
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制造商  AMD [Advanced Micro Devices]
网页  http://www.amd.com
标志 AMD - Advanced Micro Devices

AM7945JC 数据表(HTML) 6 Page - Advanced Micro Devices

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6
Am7945 Data Sheet
ELECTRICAL CHARACTERISTICS
The Am7945 device is tested under the following conditions unless otherwise noted: BAT = –48 V, VCC = +5 V,
VEE = –5 V, RL = 900 Ω. The device is not tested in Polarity Reversal state.
Description
Test Conditions (See Note 1)
Min
Typ
Max
Unit
Note
Analog output (VTX) impedance
3
Ω
Analog output (VTX) offset
0°C to +70°C
–40°C to +85°C
–37
–40
+37
+40
mV
4
Analog (RSN) input impedance
300 Hz to 3.4 kHz
1
20
Ω
4
Longitudinal impedance at A or B
35
Ω
Overload level
4-wire and 2-wire, Active state
–2.5
+2.5
Vpk
2a
On hook, RLAC = 900 Ω,
Active or OHT state
0.95
Vrms
2b
Transmission Performance
2-wire return loss
(See Test Circuit D)
200 to 3.4 kHz
26
dB
4, 8
Longitudinal Balance (2-Wire and 4-Wire, See Test Circuit C); RL = 740 Ω at BAT = 48 V
Longitudinal to metallic L-T, L-4
normal polarity
200 Hz to 1 kHz
0°C to +70°C
–40°C to +85°C
52
50
dB
4
1 kHz to 3.4 kHz
0°C to +70°C
–40°C to +85°C
52
50
4
Longitudinal signal generation 4-L
300 Hz to 800 Hz, normal polarity
40
Longitudinal current per pin
Active state and OHT state
20
27
mArms
Insertion Loss (2- to 4-Wire and 4- to 2-Wire, See Test Circuits A and B) BAT = –48 V, RL = 900 Ω
Gain accuracy
0 dBm, 1 kHz
0°C to +70°C
–40°C to +85°C
–0.15
–0.20
+0.15
+0.20
dB
4
Gain accuracy, OHT state
–10 dBm, On hook, RLAC = 900 Ω
–1.0
+1.0
4
Variation with frequency
300 to 3.4 kHz, relative to 1 kHz
0°C to +70°C
–40°C to +85°C
–0.10
–0.15
+0.10
+0.15
4
Gain tracking
+7 dBm to –55 dBm, reference 0 dBm
0°C to +70°C
–40°C to +85°C
–0.10
–0.15
+0.10
+0.15
4
4
Balance Return Signal (4- to 4-Wire, See Test Circuit B) BAT = –48 V, RL = 900 Ω
Gain accuracy
0 dBm, 1 kHz
0°C to +70°C
–40°C to +85°C
–0.15
–0.20
+0.15
+0.20
dB
3
4
Variation with frequency
300 to 3.4 kHz, relative to 1 kHz
0°C to +70°C
–40°C to +85°C
–0.10
–0.15
+0.10
+0.15
3
4
Gain tracking
+3 dBm to –55 dBm, reference 0 dBm
0°C to +70°C
–40°C to +85°C
–0.10
–0.15
+0.10
+0.15
3, 4
4
Group delay
f = 1 kHz
4
µs
4, 8
Total Harmonic Distortion (2- to 4-Wire or 4- to 2-Wire, See Test Circuits A and B) BAT = –48 V, RL = 900 Ω
Harmonic distortion
300 Hz to 3.4 kHz
2-wire level = 0 dBm
2-wire level = +7 dBm
–64
–55
–50
–40
dB



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