Data Sheet
March 1997
L7554 Low-Power SLIC
Electrical Characteristics
(continued)
Table 6. Analog Pin Characteristics
Parameter
Differential PT/PR Current Sense (DCOUT)
Gain (PT/PR to DCOUT)
Offset Voltage @ I
LOOP
= 0, V
BAT
= –48 V
Loop Closure Detector Threshold
1
Programming Accuracy
Ring Ground Detector Threshold
2
R
ICM
= 83 kΩ
Programming Accuracy
Ring Trip Comparator
Input Offset Voltage
RCVN, RCVP
Input Bias Current
Min
–119
–200
—
3
—
—
—
Typ
–125
—
—
6
—
—
–0.2
Max
–127
200
±20
10
±25
±10
–1
Unit
V/A
mV
%
kΩ
%
mV
µA
1. Loop closure threshold is programmed by resistor R
LCTH
from pin LCTH to pin DCOUT.
2. Ring ground threshold is programmed by resistor R
ICM2
from pin I
CM
to V
CC
.
Table 7. Uncommitted Op Amp Characteristics
Parameter
Input Offset Voltage
Input Offset Current
Input Bias Current
Differential Input Resistance
Output Voltage Swing (R
L
= 10 kΩ)
Output Resistance (A
VCL
= 1)
Small Signal GBW
Min
—
—
—
—
—
—
—
Typ
±5
±10
200
1.5
±3.5
2.0
700
Max
—
—
—
—
—
—
—
Unit
mV
nA
nA
MΩ
Vpk
Ω
kHz
Lucent Technologies Inc.
9
AGERE [ AGERE SYSTEMS ]
