Datasheet

LT1990
4
1990fb
3V/5V ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the temperature range of 0 ° C ≤ T
A
≤ 70 ° C. V
S
= 3V, 0V; V
S
= 5V, 0V; R
L
= 10k,
V
CM
= V
REF
= half supply, G = 1, 10, unless otherwise noted. (Notes 4, 6)
The ● denotes the specifications which apply over the temperature range of –40°C ≤ T
A
≤ 85°C. V
S
= 3V, 0V; V
S
= 5V, 0V; R
L
= 10k,
V
CM
= V
REF
= half supply, G = 1, 10, unless otherwise noted. (Notes 4, 6)
LT1990C/LT1990I
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
Input Offset Voltage, RTI V
S
= 3V, 0V
G = 1, 10
● 4.1 mV
V
S
= 5V, 0V
G = 1, 10
● 4.1 mV
V
OS
/T Input Offset Voltage Drift, RTI (Note 10) ● 522µV/°C
V
OSH
Input Offset Voltage Hysteresis, RTI (Note 11) ● 230 µV
PSRR Power Supply Rejection Ratio, RTI V
S
= 2.7V to 12.7V
V
CM
= V
REF
= 1.25V
G = 1, 10
● 78 dB
Minimum Supply Voltage Guaranteed by PSRR ● 2.7 V
I
S
Supply Current (Note 8) ● 150 µA
V
OL
Output Voltage Swing LOW –IN = V
+
, +IN = Half Supply (Note 8) ● 60 mV
V
OH
Output Voltage Swing HIGH –IN = 0V, +IN = Half Supply
V
S
= 3V, 0V, Below V
+
● 180 mV
V
S
= 5V, 0V, Below V
+
● 205 mV
I
SC
Output Short-Circuit Current Short to GND (Note 9) ● 3mA
Short to V
+
(Note 9) ● 11 mA
LT1990C/LT1990I
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
∆G Gain Error V
OUT
= 0.5V to (+V
S
) – 0.75V
LT1990, G = 1
● 0.67 %
LT1990A, G = 1
● 0.35 %
G = 10
● 0.95 %
G/T Gain vs Temperature G = 1 (Note 10) ● 2 10 ppm/°C
G = 10 (Note 10)
● 7 20 ppm/°C
V
CM
Input Voltage Range Guaranteed by CMRR
V
S
= 3V, 0V, V
REF
= 1.25V ● –5 25 V
V
S
= 5V, 0V, V
REF
= 1.25V ● –5 80 V
V
S
= 5V, 0V, V
REF
= 2.5V ● –37 48 V
CMRR Common Mode Rejection Ratio, RTI V
S
= 3V, 0V (Note 7)
V
CM
= –5V to 25V, V
REF
= 1.25V
LT1990
● 57 dB
LT1990A
● 67 dB
V
S
= 5V, 0V
V
CM
= –5V to 80V, V
REF
= 1.25V
LT1990
● 57 dB
LT1990A
● 67 dB
V
S
= 5V, 0V (Note 7)
V
CM
= –38V to 47V, V
REF
= 2.5V
LT1990
● 57 dB
LT1990A
● 67 dB