L7554 Low-Power SLIC
Data Sheet
March 1997
Electrical Characteristics
(continued)
Table 8. ac Feed Characteristics
Parameter
ac Termination Impedance
1
Longitudinal Impedance
2
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, 25
°C
Transmit Accuracy in dB, Full Temperature Range
Receive + Gain, f = 1 kHz (RCVP to PT/PR)
Receive – Gain, f = 1 kHz (RCVN to PT/PR)
Receive Accuracy in dB, 25
°C
Receive Accuracy in dB, Full Temperature Range
Gain vs. Frequency (transmit and receive)
(600
Ω
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
Ω
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
Min
150
—
—
—
—
–0.15
–0.22
—
—
–0.18
–0.25
Typ
—
40
—
—
–400
0
0
8.00
–8.00
0
0
Max
1300
46
0.3
1.0
—
0.15
0.22
—
—
0.18
0.25
Unit
Ω
Ω
%
%
V/A
dB
dB
–
–
dB
dB
–1.00
–0.3
–0.5
—
–0.05
20
26
—
—
—
—
—
—
21
26
0.0
0.0
–0.1
—
0
24
29
–87
2
10
–82
7
15
24
29
0.05
0.05
0.3
2.0
0.05
—
—
–77
12
20
–77
12
20
—
—
dB
dB
dB
dB
dB
dB
dB
dBmp
dBrnC
dBrn
dBmp
dBrnC
dBrn
dB
dB
1. Set by external components. Any complex impedance R
1
+ 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 of external components.
10
Lucent Technologies Inc.
AGERE [ AGERE SYSTEMS ]
