Datasheet

LT1490A/LT1491A
4
14901afd
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)
SYMBOL PARAMETER CONDITIONS
LT1490AC/LT1491AC
LT1490AI/LT1491AI
UNITSMIN TYP MAX
V
OS
Input Offset Voltage (Note 5) LT1490A N, S Packages
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
l
l
110 500
700
800
µV
µV
µV
LT1490A MS8 Package, LT1491A N, S Packages
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
l
l
220 1000
1200
1400
µV
µV
µV
LT1490A DD, LT1491A DHC
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
l
l
250 1200
1400
1600
µV
µV
µV
Input Offset Voltage Drift (Note 9) –40°C ≤ T
A
≤ 85°C
LT1490A DD, LT1491A DHC, –40°C ≤ T
A
≤ 85°C
l
l
2
2
4
6
µV/°C
µV/°C
I
OS
Input Offset Current
V
CM
= 44V (Note 6)
l
l
0.2 0.8
0.8
nA
µA
I
B
Input Bias Current
V
CM
= 44V (Note 6)
V
S
= 0V
l
l
1
3
0.3
8
10
nA
µA
nA
Input Bias Current Drift –40°C ≤ T
A
≤ 85°C
l
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
Common Mode, V
CM
= 0V to 44V
6
4
17
11
MΩ
MΩ
C
IN
Input Capacitance 4.6 pF
Input Voltage Range
l
044V
CMRR Common Mode Rejection Ratio
(Note 6)
V
CM
= 0V to V
CC
– 1V
V
CM
= 0V to 44V
l
l
84
80
98
98
dB
dB
A
VOL
Large-Signal Voltage Gain V
S
= 3V, V
O
= 500mV to 2.5V, R
L
= 10k
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
l
l
200
133
100
1500 V/mV
V/mV
V/mV
V
S
= 5V, V
O
= 500mV to 4.5V, R
L
= 10k
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
l
l
400
250
200
1500 V/mV
V/mV
V/mV
V
OL
Output Voltage Swing Low V
S
= 3V, No Load
V
S
= 3V, I
SINK
= 5mA
l
l
3
250
10
450
mV
mV
V
S
= 5V, No Load
V
S
= 5V, I
SINK
= 5mA
V
S
= 5V, I
SINK
= 10mA
l
l
3
250
330
10
500
500
mV
mV
mV
V
OH
Output Voltage Swing High V
S
= 3V, No Load
V
S
= 3V, I
SOURCE
= 5mA
l
l
2.95
2.55
2.978
2.6
V
V
V
S
= 5V, No Load
V
S
= 5V, I
SOURCE
= 10mA
l
l
4.95
4.30
4.978
4.6
V
V
I
SC
Short-Circuit Current (Note 2) V
S
= 3V, Short to GND
V
S
= 3V, Short to V
CC
10
10
15
30
mA
mA
V
S
= 5V, Short to GND
V
S
= 5V, Short to V
CC
15
15
25
30
mA
mA