LT1881 Datasheet, PDF (1/12 Pages) Linear Technology – Dual and Quad Rail-to-Rail Output, Picoamp Input Precision Op Amps

Final Electrical Specifications
LT1881/LT1882
Dual and Quad
Rail-to-Rail Output,
Picoamp Input Precision Op Amps
FEATURES
DESCRIPTIO
April 2000
s _{Offset Voltage: 50µV Maximum (LT1881A)}
s _{Input Bias Current: 200pA Maximum (LT1881A)}
s _{Offset Voltage Drift: 0.8µV/°C Maximum}
s _{Rail-to-Rail Output Swing}
s _{Supply Range: 2.7V to 36V}
s _{Operates with Single or Split Supplies}
s _{Open-Loop Voltage Gain: 1 Million Minimum}
s _{1mA Maximum Supply Current Per Amplifier}
s _{Stable at AV = 1, CL = 1000pF}
s _{Standard Pinouts}
U
APPLICATIO S
s _{Thermocouple Amplifiers}
s _{Bridge Transducer Conditioners}
s _{Instrumentation Amplifiers}
s _{Battery-Powered Systems}
s _{Photo Current Amplifiers}
The LT^®1881 and LT1882 op amps bring high accuracy
input performance to amplifiers with rail-to-rail output
swing. Input bias currents and capacitive load driving
capabilities are superior to the similar LT1884 and LT1885
amplifiers, at the cost of a slight loss in speed. Input
offset voltage is trimmed to less than 50µV and the low
drift maintains this accuracy over the operating tempera-
ture range. Input bias currents are an ultralow 200pA
maximum.
The amplifiers work on any total power supply voltage
between 2.7V and 36V (fully specified from 5V to ±15V).
Output voltage swings to within 40mV of the negative
supply and 220mV of the positive supply make these
amplifiers good choices for low voltage single supply
operation.
Capacitive loads up to 1000pF can be driven directly in
unity-gain follower applications.
The dual LT1881 and LT1881A are available with standard
pinouts in S8 and PDIP packages. The quad LT1882 is in
a 14-pin SO package. For a higher speed device with
similar DC specifications, see the LT1884/LT1885.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
16-Bit Voltage Output DAC on ±5V Supply
5V
1.65k
LT1634
4.096V
5V
+
LT1881
–
–5V
R1
R_COM REF
R_OFS
DAC
LTC^®1597
33pF
5V
–
LT1881
+
–5V
V_OUT
– 4.096V
TO 4.096V
TC V_OS Distribution, Industrial Grade
26
24 V_S = ±15V
22
20 ^{40 N8 (1 LOT)}
18 ^{144 S8 (2 LOTS)}
16 ^{184 TOTAL PARTS}
14
12
10
8
6
4
2
0
1 –0.9–0.8–0.7–0.6–0.5–0.4–0.3–0.2–0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
INPUT OFFSET VOLTAGE DRIFT (µV/°C)
1881/2 TA01a
1881/2 TA01
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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