Datasheet

3
LT1490A/LT1491A
sn1490, 14901afbs
LT1490AC/LT1491AC
LT1490AI/LT1491AI
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Note 5) LT1490A N, S Packages 110 500 µV
0°C ≤ T
A
≤ 70°C ● 700 µV
–40°C ≤ T
A
≤ 85°C ● 800 µV
LT1490A MS8 Package, LT1491A N, S Packages 220 1000 µV
0°C ≤ T
A
≤ 70°C ● 1200 µV
–40°C ≤ T
A
≤ 85°C ● 1400 µV
LT1490A DD, LT1491A DHC 250 1200 µV
0°C ≤ T
A
≤ 70°C ● 1400 µV
–40°C ≤ T
A
≤ 85°C ● 1600 µV
Input Offset Voltage Drift (Note 9) –40°C ≤ T
A
≤ 85°C ● 24 µV/°C
LT1490A DD, LT1491A DHC, – 40°C ≤ T
A
≤ 85°C ● 26 µV/°C
I
OS
Input Offset Current ● 0.2 0.8 nA
V
CM
= 44V (Note 6) ● 0.8 µA
I
B
Input Bias Current ● 18 nA
V
CM
= 44V (Note 6) ● 310 µA
V
S
= 0V 0.3 nA
Input Bias Current Drift – 40°C ≤ T
A
≤ 85°C ● 2 pA/°C
Input Noise Voltage 0.1Hz to 10Hz 1 µV
P-P
e
n
Input Noise Voltage Density f = 1kHz 50 nV/√Hz
i
n
Input Noise Current Density f = 1kHz 0.015 pA/√Hz
R
IN
Input Resistance Differential 6 17 MΩ
Common Mode, V
CM
= 0V to 44V 4 11 MΩ
C
IN
Input Capacitance 4.6 pF
Input Voltage Range ● 044V
CMRR Common Mode Rejection Ratio V
CM
= 0V to V
CC
– 1V ● 84 98 dB
(Note 6) V
CM
= 0V to 44V ● 80 98 dB
A
VOL
Large-Signal Voltage Gain V
S
= 3V, V
O
= 500mV to 2.5V, R
L
= 10k 200 1500 V/mV
0°C ≤ T
A
≤ 70°C ● 133 V/mV
–40°C ≤ T
A
≤ 85°C ● 100 V/mV
V
S
= 5V, V
O
= 500mV to 4.5V, R
L
= 10k 400 1500 V/mV
0°C ≤ T
A
≤ 70°C ● 250 V/mV
–40°C ≤ T
A
≤ 85°C ● 200 V/mV
V
OL
Output Voltage Swing Low V
S
= 3V, No Load ● 310 mV
V
S
= 3V, I
SINK
= 5mA ● 250 450 mV
V
S
= 5V, No Load ● 310 mV
V
S
= 5V, I
SINK
= 5mA ● 250 500 mV
V
S
= 5V, I
SINK
= 10mA 330 500 mV
V
OH
Output Voltage Swing High V
S
= 3V, No Load ● 2.95 2.978 V
V
S
= 3V, I
SOURCE
= 5mA ● 2.55 2.6 V
V
S
= 5V, No Load ● 4.95 4.978 V
V
S
= 5V, I
SOURCE
= 10mA ● 4.30 4.6 V
I
SC
Short-Circuit Current (Note 2) V
S
= 3V, Short to GND 10 15 mA
V
S
= 3V, Short to V
CC
10 30 mA
V
S
= 5V, Short to GND 15 25 mA
V
S
= 5V, Short to V
CC
15 30 mA
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature
range of – 40°C ≤ T
A
≤ 85°C, otherwise specifications are at T
A
= 25°C. V
S
= 3V, 0V; V
S
= 5V, 0V; V
CM
= V
OUT
= half supply unless
otherwise noted. (Note 4)