LT1494/LT1495/LT1496
1.5µA Max, Single, Dual
and Quad Over-The-Top Precision
Rail-to-Rail Input and Output Op Amps
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FEATURES
DESCRIPTIO
The LT®1494/LT1495/LT1496 are the lowest power
(IS ≤ 1.5µA) op amps with precision specifications. The
extremely low supply current is combined with excellent
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Low Supply Current: 1.5µA Max
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Rail-to-Rail Input and Output
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Low Offset Voltage: 375µV Max
amplifier specifications: 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
(AVOL) of 100V/mV ensures that gain errors are small. The
device characteristics change little over the supply range
of2.2Vto±15V. Supplyrejectionis90dBandthecommon
moderejectionratiois90dB. Operationisspecifiedfor3V,
5V and ±15V supplies. Reverse battery protection
(–18V min) and inputs that operate above the positive
supply make the LT1494/LT1495/LT1496 easy to use in
harsh environments.
Operating Temperature Range: –40°C to 125°C
Over-The-TopTM Inputs Operate Above V+
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 AVOL: 100V/mV Minimum Driving 100kΩ Load
Output Sources and Sinks 500µA Load Current
Reverse Battery Protected to 18V
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APPLICATIO S
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 4µVP-P is
remarkably low considering the low supply current.
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Battery- or Solar-Powered Systems
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Portable Instrumentation
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Remote Sensor Amplifier
Micropower Filter
The LT1494 is available in the 8-Pin MSOP, PDIP and SO
packages.The LT1495 is available in plastic 8-Pin PDIP
and SO packages with the standard dual op amp pinout.
The LT1496 is available in 14-Pin SO and PDIP packages.
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, LTC and LT are registered trademarks of Linear Technology Corporation.
Over-The-Top is a trademark of Linear Technology Corporation.
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TYPICAL APPLICATION
Micropower Integrating Current Sense
TC VOS Distribution
RESET
30
100 AMPLIFIERS
V
= ±2.5V
S
0.1µF
25
20
15
10
5
–40°C TO 85°C
V
CC
R
I
1M
–
R
S
–
1/2 LT1495
0.1Ω
1M
1/2 LT1495
V
O
+
I
L
+
10M
10M
LOAD
1495 TA01
V
CC
0
200k
–2.0 –1.6 –1.2 –0.8 –0.4
0
0.4 0.8 1.2 1.6 2.0
TC V (µV/°C)
OS
OUTPUT SWITCHES
WHEN I dt = 0.98 V
L
1495 TA02
R
R
I
C = (4.9A)(SEC) FOR V = 5V
CC
CC
(
)
S
I
= 3µA DURING INTEGRATION; I = 5µA END OF INTEGRATION
S
S
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