LT1881/LT1882
Dual and Quad
Rail-to-Rail Output, Picoamp
Input Precision Op Amps
DESCRIPTION
FEATURES
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Offset Voltage: 50μV Maximum (LT1881A)
Input Bias Current: 200pA Maximum (LT1881A)
Offset Voltage Drift: 0.8μV/°C Maximum
Rail-to-Rail Output Swing
Supply Range: 2.7V to 36V
Operates with Single or Split Supplies
Open-Loop Voltage Gain: 1 Million Minimum
1mA Maximum Supply Current Per Amplifier
Stable at AV = 1, CL = 1000pF
Standard Pinouts
Wide Operating Temperature Range:
–55°C to 125°C (LT1882)
APPLICATIONS
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Thermocouple Amplifiers
Bridge Transducer Conditioners
Instrumentation Amplifiers
Battery-Powered Systems
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
temperature 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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
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.
TYPICAL APPLICATION
16-Bit Voltage Output DAC on ± 5V Supply
TC VOS Distribution, Industrial Grade
5V
5V
PERCENT OF UNITS (%)
1.65k
+
LT1881
–
LT1634
4.096V
–5V
R1
RCOM
REF
ROFS
33pF
5V
DAC
–
LT1881
LTC®1597
+
26
24
22
20
18
16
14
12
10
8
6
4
2
0
VOUT
–4.096V
TO 4.096V
VS = ±15V
40 N8 (1 LOT)
144 S8 (2 LOTS)
184 TOTAL PARTS
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)
18812 TA01b
–5V
18812 TA01a
18812fb
1