Datasheet

UC2902
UC3902
SLUS232E − DECEMBER 19, 2002 − REVISED JULY 2011
4
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ELECTRICAL CHARACTERISTICS (continued)
T
J
= –40°C to 105°C, (unless otherwise noted)
PARAMETER UNITMAXTYPMINTEST CONDITIONS
SHARE SENSE AMPLIFIER
R
Input impedance
V
(SHARE+)
= 1 V, V
(SHARE−)
= GND
V
(SENSE)
= 10 mV
8 15
kΩ
R
IN
Input impedance
R
(SHARE+)
= 200 Ω (SHARE+ to GND)
V
(SHARE−)
= 1 V, V
(SENSE)
= 10 mV
8 15
kΩ
V
(SHARE)
Threshold voltage V
(SENSE)
= 0 V 41 70 100 mV
CMRR Common mode rejection ratio 0 V ≤ V
(SHARE−)
≤ 1 V, V
(SENSE)
= −2.5 mV 50 60
AVOL
DESCRIPTION from SHARE+ to
V
(SENSE)
= −2.5 mV,
5 nF capacitor from COMP to GND,
1 kΩ resistor from ADJR to GND
50 68
dB
AVOL
DESCRIPTION from SHARE+ to
ADJR
V
(SENSE)
= −2.5 mV,
5 nF capacitor from COMP to GND,
150 Ω resistor from ADJR to GND
50 66
dB
Slew rate
V
(SHARE+)
= 0 mV to 10 V step through a 200-Ω
resistor, R
(COMP)
= 500 Ω,
V
(SENSE)
= 10 mV, V
CC
= 10 V
0.2 0.5 0.8 V/μs
ERROR AMPLIFIER
g
M
Transconductance, SHARE+ to
COMP
200-Ω resistor SHARE+ to GND 3.0 4.5 6.0 mS
I
OH
High-level output current
V
(COMP)
= 1.5 V, SHARE+ ≥ 300 mV
V
(SENSE)
= −10 mV
−450 −325 −200
A
I
OL
Low-level output current
200-Ω resistor SHARE+ to GND,
V
(COMP)
= 1.5 V, V
(SENSE)
= 10 mV
80 150 250
μA
V
IO
Input offset voltage 15 35 65 mV
ΔV
IO
/
ΔV
(SENSE)
1-kΩ resistor ADJR to GND
−2.5 mV ≤ V
(SENSE)
≤ −25 mV
−6 0 6 mV/V
ADJ AMPLIFIER
ADJR low voltage
200-Ω resistor SHARE+ to GND,
V
(SENSE)
= 10 mV
−1 0 1 mV
ADJR high voltage V
(SENSE)
= 10 mV, V
(SHARE+)
= 1 V 1.4 1.8 2.1 V
I
(ADJR)
= −0.5 mA, V
(ADJ)
= 2.5 V,
V
(SENSE)
= 10 mV, V
(SHARE+)
= 1 V
0.96 0.99 1.02
Current gain ADJR to ADJ
I
(ADJR)
= −0.5 mA, V
(ADJ)
= 20 V,
V
(SENSE)
= 10 mV, V
(SHARE+)
= 1 V
0.96 0.99 1.02
A/A
Current gain ADJR to ADJ
I
(ADJR)
= −10 mA, V
(ADJ)
= 2.5 V,
V
(SENSE)
= 10 mV, V
(SHARE+)
= 1 V
0.96 0.99 1.02
A/A
I
(ADJR)
= −10 mA, V
(ADJ)
= 20 V,
V
(SENSE)
= 10 mV, V
(SHARE+)
= 1 V
0.96 0.99 1.02