OPA734, OPA2734
OPA735, OPA2735
SBOS282B − DECEMBER 2003 − REVISED FEBRUARY 2005
0.05µV/°C max, SINGLE-SUPPLY CMOS
OPERATIONAL AMPLIFIERS
Zer∅-Drift Series
FD EATURES
DESCRIPTION
The OPA734 and OPA735 series of CMOS operational
amplifiers use auto-zeroing techniques to simultaneously
provide low offset voltage (5µV max) and near-zero drift
over time and temperature. These miniature, high-preci-
sion, low quiescent current amplifiers offer high input
impedance and rail-to-rail output swing within 50mV of the
rails. Either single or bipolar supplies can be used in the
range of +2.7V to +12V ( 1.35V to 6V). They are
optimized for low-voltage, single-supply operation.
LOW OFFSET VOLTAGE: 5µV (max)
ZERO DRIFT: 0.05µV/°C max
QUIESCENT CURRENT: 750µA (max)
SINGLE-SUPPLY OPERATION
LOW BIAS CURRENT: 200pA (max)
SHUTDOWN
D
D
D
D
D
D
D
MicroSIZE PACKAGES
WIDE SUPPLY RANGE: 2.7V to 12V
The OPA734 family includes a shutdown mode. Under
logic control, the amplifiers can be switched from normal
operation to a standby current that is 9µA (max) and the
output placed in a high-impedance state.
AD PPLICATIONS
TRANSDUCER APPLICATIONS
D
D
D
D
D
TEMPERATURE MEASUREMENTS
ELECTRONIC SCALES
MEDICAL INSTRUMENTATION
BATTERY-POWERED INSTRUMENTS
HANDHELD TEST EQUIPMENT
The single version is available in the MicroSIZE SOT23-5
(SOT23-6 for shutdown version) and the SO-8 packages.
The dual version is available in the MSOP-8 and SO-8
packages (MSOP-10 only for the shutdown version). All
versions are specified for operation from −40°C to +85°C.
VREF = 15V
R3
G = 1 + 2
RG
REF102
10V
R1
1kΩ
C1
1nF
1/2
OPA2735
R3
10kΩ
C4
1nF
C2
10nF
C4
1nF
RG
R3
10kΩ
R2
1k
1/2
Ω
OPA2735
C3
1nF
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