ATTL7557AAU データシートの表示（PDF） - Agere -> LSI Corporation
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ATTL7557AAU Datasheet PDF : 28 Pages
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L7556, L7557 Low-Power SLICs
with Battery Switch
Data Sheet
January 2000
Electrical Characteristics (continued)
Table 8. ac Feed Characteristics
Parameter
Min
ac Termination Impedance1:
150
Longitudinal Impedance2 (See Figure 8.)
—
Total Harmonic Distortion—200 Hz to 4 kHz2:
Off-hook
—
On-hook
—
Transmit Gain, f = 1 kHz (PT/PR to VITR)
Transmit Accuracy in dB
–122
–0.18
Receive + Gain, f = 1 kHz (RCVP to PT/PR)
Receive – Gain, f = 1 kHz (RCVN to PT/PR)
Receive Accuracy in dB
7.84
–7.84
–0.18
Gain vs. Frequency (transmit and receive) (600 Ω 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
—
Gain vs. Level (transmit and receive)(reference 0 dBV2):
–50 dB to +3 dB
–0.05
Return Loss3:
200 Hz to 500 Hz
20
500 Hz to 3400 Hz
26
2-wire Idle-channel Noise (600 Ω termination):
Psophometric
—
C-message
—
3 kHz Flat
—
Transmit Idle-channel Noise:
Psophometric
—
C-message
—
3 kHz flat
—
Transhybrid Loss3:
200 Hz to 500 Hz
21
500 Hz to 3400 Hz
26
Typ
—
40
—
—
–125
0
8.00
–8.00
0
0.0
0.0
–0.1
—
0
24
29
–87
2
10
–82
7
15
24
29
Max
1300
46
0.3
1.0
–128
0.18
8.16
–8.16
0.18
0.05
0.05
0.3
2.0
0.05
—
—
–77
12
20
–77
12
20
—
—
Unit
Ω
Ω
%
%
V/A
dB
—
—
dB
dB
dB
dB
dB
dB
dB
dB
dBmp
dBrnC
dBrn
dBmp
dBrnC
dBrn
dB
dB
1. Set by external components. Any complex impedance R1 + R2 || C between 150 Ω and 1300 Ω 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.
10
Lucent Technologies Inc.
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