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參數資料
| 型號： | L9219A |
| 英文描述： | CAP CER 390PF 3.15KVDC R3 RAD |
| 中文描述： | 低成本線接口，具有反向電池和雙電流限制 |
| 文件頁數： | 11/30頁 |
| 文件大小： | 397K |
| 代理商： | L9219A |
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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 R
1
+ 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
150
—
Typ
—
0
Max
1300
—
Unit
ac Termination Impedance
1
Longitudinal Impedance at PT/PR
2
Total Harmonic Distortion—200 Hz to 4 kHz
2
:
Off-hook
On-hook
Transmit Gain, f = 1 kHz (PT/PR to VITR) (current limit)
—
—
—
—
0.3
1.0
–415
%
%
V/A
–391
–403
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 kHz
2
):
200 Hz to 300 Hz
300 Hz to 3.4 kHz
3.4 kHz to 16 kHz
16 kHz to 266 kHz
Gain vs. Level (transmit and receive)(reference 0 dBV
2
):
–55 dB to +3 dB
2-wire Idle-channel Noise (600
termination):
Psophometric
2
C-message
3 kHz Flat
2
Transmit Idle-channel Noise:
Psophometric
2
C-message
3 kHz Flat
2
–1.00
–0.3
–3.0
—
0.0
0.0
–0.1
—
0.05
0.05
0.3
2.5
dB
dB
dB
dB
–0.05
0
0.05
dB
—
—
—
–87
2
10
–77
12
20
dBmp
dBrnC
dBrn
—
—
—
–82
7
15
–77
12
20
dBmp
dBrnC
dBrn
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