OPA2171-EP_16 Datasheet, PDF (14/28 Pages) Texas Instruments – 36-V, Single-Supply, SOT553, General-Purpose Operational Amplifiers

OPA2171-EP
SBOS735 – SEPTEMBER 2015
7 Detailed Description
www.ti.com
7.1 Overview
The OPA2171-EP operational amplifier provides high overall performance, making it ideal for many general-
purpose applications. The excellent offset drift of only 2 µV/°C provides excellent stability over the entire
temperature range. In addition, the device offers very good 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.
7.2 Functional Block Diagram
+
PCH
FF Stage
±
Ca
Cb
+IN
+
+
+
PCH
Input Stage
2^nd Stage
Output
Stage
OUT
±IN
±
±
±
+
NCH
Input Stage
±
7.3 Feature Description
7.3.1 Operating Characteristics
The OPA2171-EP amplifier is specified for operation from 2.7 to 36 V (±1.35 to ±18 V). Many of the
specifications apply from –55°C to 125°C. Parameters that can exhibit significant variance with regard to
operating voltage or temperature are presented in Typical Characteristics.
7.3.2 Phase-Reversal Protection
The OPA2171-EP has an internal phase-reversal protection. Many operational amplifiers exhibit a phase reversal
when the input is driven beyond its linear common-mode range. This condition is most often encountered in
noninverting circuits when the input is driven beyond the specified common-mode voltage range, causing the
output to reverse into the opposite rail. The input of the OPA2171-EP prevents phase reversal with excessive
common-mode voltage. Instead, the output limits into the appropriate rail. Figure 37 shows this performance.
14
Submit Documentation Feedback
Product Folder Links: OPA2171-EP
Copyright © 2015, Texas Instruments Incorporated