LT1495 Datasheet, PDF (1/12 Pages) Linear Technology – 1.5uA Max, Dual and Quad Precision Rail-to-Rail Input and Output Op Amps

FEATURES
s _{Low Supply Current: 1.5µA Max}
s _{Rail-to-Rail Input and Output}
s _{Low Offset Voltage: 375µV Max}
s _{Wide Supply Range: 2.2V to 36V}
s _{Single Supply Input Range: – 0.3V to 36V}
s _{Low Input Bias Current: 250pA}
s _{Low Input Offset Current: 20pA}
s _{High AVOL: 100V/mV Minimum Driving 100kΩ Load}
s _{Output Sources and Sinks 500µA Load Current}
s _{Reverse Battery Protected to 18V}
U
APPLICATIONS
s _{Battery- or Solar-Powered Systems}
s _{Portable Instrumentation}
s _{Remote Sensor Amplifier}
s _{Micropower Filter}
LT1495/LT1496
1.5µA Max, Dual and Quad
Precision Rail-to-Rail
Input and Output Op Amps
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.
TYPICAL APPLICATION
Micropower Integrating Current Sense
RESET
V_CC
R_I
1M
R_S
0.1Ω _1M
I_L
0.1µF
–
1/2 LT1495
+
LOAD
10M
V_CC
200k
–
1/2 LT1495
+
10M
V_O
1495 TA01
( ) ^{OUTPUT SWITCHES}
WHEN I_Ldt = 0.98 V_CC
R_I
R_S
C = (4.9A)(SEC) FOR V_CC = 5V
I_S = 3µA DURING INTEGRATION; I_S = 5µA END OF INTEGRATION
TC V_OS Distribution
30
100 AMPLIFIERS
25
V_S = ±2.5V
–40°C TO 85°C
20
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
1