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參數(shù)資料
| 型號(hào)： | L7556 |
| 英文描述： | Low-Power SLICs with Battery Switch |
| 中文描述： | 低功耗SLIC組件的電池開(kāi)關(guān) |
| 文件頁(yè)數(shù)： | 10/28頁(yè) |
| 文件大?。?/td> | 700K |
| 代理商： | L7556 |
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10
Lucent Technologies Inc.
Data Sheet
January 2000
with Battery Switch
L7556, L7557 Low-Power SLICs
Electrical Characteristics
(continued)
Table 8. ac Feed Characteristics
1. Set by external components. Any complex impedance R1 + R2 || C between 150
and 1300
can be synthesized.
2. This parameter is not tested in production. It is guaranteed by design and device characterization.
3. Return loss and transhybrid loss are functions of device gain accuracies and the external hybrid circuit. Guaranteed performance assumes
1% tolerance external components.
Parameter
Min
150
—
Typ
—
40
Max
1300
46
Unit
ac Termination Impedance
1
:
Longitudinal Impedance
2
(See Figure 8.)
Total Harmonic Distortion—200 Hz to 4 kHz
2
:
Off-hook
On-hook
Transmit Gain, f = 1 kHz (PT/PR to VITR)
Transmit Accuracy in dB
Receive + Gain, f = 1 kHz (RCVP to PT/PR)
Receive – Gain, f = 1 kHz (RCVN to PT/PR)
Receive Accuracy in dB
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
):
–50 dB to +3 dB
Return Loss
3
:
200 Hz to 500 Hz
500 Hz to 3400 Hz
2-wire Idle-channel Noise (600
termination):
Psophometric
C-message
3 kHz Flat
Transmit Idle-channel Noise:
Psophometric
C-message
3 kHz flat
Transhybrid Loss
3
:
200 Hz to 500 Hz
500 Hz to 3400 Hz
—
—
—
—
0.3
1.0
–128
0.18
8.16
–8.16
0.18
%
%
V/A
dB
—
—
dB
–122
–0.18
7.84
–7.84
–0.18
–125
0
8.00
–8.00
0
–1.00
–0.3
–3.0
—
0.0
0.0
–0.1
—
0.05
0.05
0.3
2.0
dB
dB
dB
dB
–0.05
0
0.05
dB
20
26
24
29
—
—
dB
dB
—
—
—
–87
2
10
–77
12
20
dBmp
dBrnC
dBrn
—
—
—
–82
7
15
–77
12
20
dBmp
dBrnC
dBrn
21
26
24
29
—
—
dB
dB
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