Datasheet

LT1990
3
1990fb
3V/5V ELECTRICAL CHARACTERISTICS
V
S
= 3V, 0V; V
S
= 5V, 0V; R
L
= 10k, V
CM
= V
REF
= half supply, G = 1, 10, T
A
= 25°C, unless otherwise noted. (Note 6)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
Offset Voltage, RTI G = 1, 10 0.8 3 mV
e
n
Input Noise Voltage, RTI f
O
= 0.1Hz to 10Hz 22 µV
P-P
Noise Voltage Density, RTI f
O
= 1kHz 1 µV/√Hz
R
IN
Input Resistance Differential 2 MΩ
Common Mode 0.5 MΩ
PSRR Power Supply Rejection Ratio, RTI V
S
= 2.7V to 12.7V, V
CM
= V
REF
= 1.25V 80 92 dB
Minimum Supply Voltage Guaranteed by PSRR 2.4 2.7 V
I
S
Supply Current (Note 8) 105 120 µA
V
OL
Output Voltage Swing LOW –IN = V
+
, +IN = Half Supply (Note 8) 30 50 mV
V
OH
Output Voltage Swing HIGH –IN = 0V, +IN = Half Supply
V
S
= 3V, 0V, Below V
+
100 150 mV
V
S
= 5V, 0V, Below V
+
120 175 mV
I
SC
Output Short-Circuit Current Short to GND (Note 9) 4 8 mA
Short to V
+
(Note 9) 13 20 mA
BW Bandwidth (–3dB) G = 1 100 kHz
G = 10 6.5 kHz
SR Slew Rate G = 1, V
S
= 5V, 0V, V
OUT
= 0.5V to 4.5V 0.5 V/µs
Settling Time to 0.01% 4V Step, G = 1, V
S
= 5V, 0V 45 µs
AV
REF
Reference Gain to Output G = 1 1 ± 0.0007
G = 10 1 ± 0.007
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)
LT1990C/LT1990I
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
∆G Gain Error V
OUT
= 0.5V to (+V
S
) – 0.75V
LT1990, G = 1
● 0.65 %
LT1990A, G = 1
● 0.33 %
G = 10
● 0.90 %
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
● 58 dB
LT1990A
● 68 dB
V
S
= 5V, 0V
V
CM
= –5V to 80V, V
REF
= 1.25V
LT1990
● 58 dB
LT1990A
● 68 dB
V
S
= 5V, 0V (Note 7)
V
CM
= –38V to 47V, V
REF
= 2.5V
LT1990
● 58 dB
LT1990A
● 68 dB