OPA171_15 Datasheet, PDF (16/43 Pages) Texas Instruments – Single-Supply, SOT553, General-Purpose Operational Amplifiers

OPA171, OPA2171, OPA4171
SBOS516E – SEPTEMBER 2010 – REVISED JUNE 2015
7 Detailed Description
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7.1 Overview
The OPAx171 family of operational amplifiers provide high overall performance, making them 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
OPA172
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 OPAx171 family of amplifiers is specified for operation from 2.7 to 36 V (±1.35 to ±18 V). Many of the
specifications apply from –40°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 Common-Mode Voltage Range
The input common-mode voltage range of the OPAx171 series extends 100 mV below the negative rail and
within 2 V of the top rail for normal operation.
This device can operate with full rail-to-rail input 100 mV beyond the top rail, but with reduced performance within
2 V of the top rail. The typical performance in this range is summarized in Table 2.
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