le7920 Zarlink Semiconductor, le7920 Datasheet - Page 8

• Manufacturer Part Number: le7920
• Description: Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

ELECTRICAL CHARACTERISTICS
Note:
* Performance Grade
Transmission Performance
2-wire return loss
Analog output (VTX) impedance
Analog (VTX) output offset voltage
Overload level, 2-wire and 4-wire
Overload level
THD, Total Harmonic Distortion
THD, On hook
Longitudinal Capability (See Test Circuit D)
Longitudinal to
metallic L-T, L-4
balance
Longitudinal signal generation 4-L
Longitudinal current per pin (A or B)
Longitudinal impedance at A or B
Idle Channel Noise
C-message weighted noise
Psophometric weighted noise
Insertion Loss and Balance Return Signal (See Test Circuits A and B)
Gain accuracy
4- to 2-wire
Gain accuracy
2- to 4-wire, 4- to 4-wire
Gain accuracy, 4- to 2-wire
Gain accuracy, 2- to 4-wire, 4- to 4-wire On hook
Gain accuracy over frequency
Gain tracking
Gain tracking
On hook
Group delay
Description
200 Hz to 3.4 kHz
Active state
On hook, R
0 dBm
+7 dBm
0 dBm, R
200 Hz to 1 kHz
1 kHz to 3.4 kHz
200 Hz to 3.4 kHz
Active state
0 to 100 Hz
R
R
R
R
0 dBm, 1 kHz
0 dBm, 1 kHz
On hook
300 to 3.4 kHz
relative to 1 kHz
+3 dBm to –55 dBm
relative to 0 dBm
0 dBm to –37 dBm
+3 dBm to 0 dBm
0 dBm, 1 kHz
L
L
L
L
0°C to +70°C
0°C to +70°C
–40°C to +85°C
–40°C to +85°C
0°C to +70°C
0°C to +70°C
–40°C to +85°C
–40°C to +85°C
Test Conditions (See Note 1)
= 600 Ω
= 600 Ω
= 600 Ω
= 600 Ω
LAC
Zarlink Semiconductor Inc.
LAC
= 600 Ω
= 600 Ω
–40°C to +85°C
–40°C to +85°C
0°C to +70°C
0°C to +70°C
8
–1*
–2
–1
–2
–1*
–2
–1
–2
–0.20
–6.22
–0.35
–6.37
–0.15
–0.15
–0.15
–0.35
Min
0.77
–50
2.5
26
52
63
50
58
52
58
50
53
40
20
–6.02
–6.02
Typ
–64
–55
–83
27
25
3
7
0
4
+0.20
–5.82
+0.35
–5.67
+0.15
+0.15
+0.15
+0.35
Max
+50
–50
–40
–36
+10
+12
–80
–78
20
35
mArms
dBrnc
dBmp
Unit
Vrms
Ω/pin
Vpk
mV
dB
dB
dB
dB
µs
Ω
Note
1, 4
4, 7
2a
2b
4
5
4
4
4
4
8
4
4