OPA180_15 Datasheet, PDF (13/38 Pages) Texas Instruments – Drift, Low-Noise, Rail-to-Rail Output, 36-V, Zero-Drift Operational Amplifiers

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8 Detailed Description
OPA180, OPA2180, OPA4180
SBOS584D – NOVEMBER 2011 – REVISED MAY 2014
8.1 Overview
The OPAx180 family of operational amplifiers combine precision offset and drift with excellent overall
performance, making them ideal for many precision applications. The precision offset drift of only 0.1 µV/°C
provides stability over the entire temperature range. In addition, the devices offer excellent overall performance
with high CMRR, PSRR, and A_OL. As with all amplifiers, applications with noisy or high-impedance power
supplies require decoupling capacitors close to the device pins. In most cases, 0.1-µF capacitors are adequate.
8.2 Functional Block Diagram
V+
C2
Notch
CHOP1
GM1
CHOP2
Filter
GM2
GM3

+IN

-IN




OUT
C1


GM_FF
V-
8.3 Feature Description
8.3.1 Operating Characteristics
The OPAx180 family of amplifiers is specified for operation from 4 V to 36 V (±2 V to ±18 V). Many of the
specifications apply from –40°C to 105°C. Parameters that can exhibit significant variance with regard to
operating voltage or temperature are presented in the Typical Characteristics.
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Product Folder Links: OPA180 OPA2180 OPA4180