LT1495/LT1496
1.5µA Max, Dual and Quad
Precision Rail-to-Rail
Input and Output Op Amps
FEATURES
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DESCRIPTION
The LT
®
1495/LT1496 are the lowest power (I
S
≤
1.5µA) op
amps with precision specifications. The extremely low
supply current is combined with excellent amplifier speci-
fications: input offset voltage is 375µV maximum with a
typical drift of only 0.4µV/°C, input offset current is 100pA
maximum. A minimum open-loop gain (A
VOL
) of 100V/mV
ensures that gain errors are small. The device character-
istics change little over the supply range of 2.2V to
±15V.
Supply rejection is 90dB and the common mode rejection
ratio is 90dB. Operation is specified for 3V, 5V and
±15V
supplies. Reverse battery protection (–18V min) and
inputs that operate above the positive supply make the
LT1495/LT1496 easy to use in harsh environments.
The low bias currents and offset current of the amplifier
permit the use of megohm level source resistors without
introducing significant errors. Voltage noise at 4µV
P-P
is
remarkably low considering the low supply current.
The LT1495 is available in plastic 8-pin PDIP and SO-8
packages with the standard dual op amp pinout. The
LT1496 is available in 14-pin SO and PDIP packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Low Supply Current: 1.5
µ
A Max
Rail-to-Rail Input and Output
Low Offset Voltage: 375
µ
V Max
Wide Supply Range: 2.2V to 36V
Single Supply Input Range: – 0.3V to 36V
Low Input Bias Current: 250pA
Low Input Offset Current: 20pA
High A
VOL
: 100V/mV Minimum Driving 100kΩ Load
Output Sources and Sinks 500µA Load Current
Reverse Battery Protected to 18V
APPLICATIONS
s
s
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Battery- or Solar-Powered Systems
Portable Instrumentation
Remote Sensor Amplifier
Micropower Filter
TYPICAL APPLICATION
Micropower Integrating Current Sense
RESET
0.1µF
V
CC
R
I
1M
R
S
0.1Ω 1M
I
L
LOAD
10M
V
CC
200k
10M
1495 TA01
30
25
20
UNITS
100 AMPLIFIERS
V
S
=
±2.5V
–40°C TO 85°C
–
1/2 LT1495
–
1/2 LT1495
V
O
15
10
5
0
– 2.0 –1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 2.0
TC V
OS
(µV/°C)
1495 TA02
+
+
R
I
C = (4.9A)(SEC) FOR V
CC
= 5V
R
S
I
S
= 3µA DURING INTEGRATION; I
S
= 5µA END OF INTEGRATION
OUTPUT SWITCHES
WHEN I
L
dt = 0.98 V
CC
( )
U
U
U
TC V
OS
Distribution
1
LINER [ LINEAR TECHNOLOGY ]
