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| 型号： | LUCL9219GAR-DT |
| 英文描述： | Low-Cost Line Interface with Reverse Battery and Dual Current Limit |
| 中文描述： | 低成本线接口，具有反向电池和双电流限制 |
| 文件页数： | 3/30页 |
| 文件大小： | 397K |
| 代理商： | LUCL9219GAR-DT |
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Agere Systems Inc.
11
Data Sheet
November 2001
with Reverse Battery and Dual Current Limit
L9219A/G Low-Cost Line Interface
Electrical Characteristics (continued)
Table 7. ac Feed Characteristics
1. With a first-generation codec, this parameter is set by external components. Any complex impedance R1 + R2 || C between 150
and
1300
can be synthesized. With a third-generation codec, this parameter is set by a codec or by a combination of a codec and an external
network.
2. This parameter is not tested in production. It is guaranteed by design and device characterization.
3. Use this gain option with a first-generation or third-generation codec.
4. Use this gain option with an Agere third-generation codec.
Parameter
Min
Typ
Max
Unit
ac Termination Impedance1
150
—
1300
Longitudinal Impedance at PT/PR2
—
0
—
Total Harmonic Distortion—200 Hz to 4 kHz2:
Off-hook
On-hook
—
0.3
1.0
%
Transmit Gain, f = 1 kHz (PT/PR to VITR) (current limit)
–391
–403
–415
V/A
L9219A, Open Loop:
Receive + Gain, f = 1 kHz (RCVP to PT/PR)3
Receive – Gain, f = 1 kHz (RCVN to PT/PR)3
L9219G, Open Loop:
Receive + Gain, f = 1 kHz (RCVP to PT/PR)4
Receive – Gain, f = 1 kHz (RCVN to PT/PR)4
7.62
–7.62
1.94
–1.94
7.86
–7.86
2.00
–2.00
8.09
–8.09
2.06
–2.06
—
Gain vs. Frequency (transmit and receive)
(600
termination; reference 1 kHz2):
200 Hz to 300 Hz
300 Hz to 3.4 kHz
3.4 kHz to 16 kHz
16 kHz to 266 kHz
–1.00
–0.3
–3.0
—
0.0
–0.1
—
0.05
0.3
2.5
dB
Gain vs. Level (transmit and receive)(reference 0 dBV2):
–55 dB to +3 dB
–0.05
0
0.05
dB
2-wire Idle-channel Noise (600
termination):
Psophometric2
C-message
3 kHz Flat2
—
–87
2
10
–77
12
20
dBmp
dBrnC
dBrn
Transmit Idle-channel Noise:
Psophometric2
C-message
3 kHz Flat2
—
–82
7
15
–77
12
20
dBmp
dBrnC
dBrn
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