OPA1688_15 Datasheet, PDF (18/40 Pages) Texas Instruments – SoundPlus 36-V, Single-Supply, 10-MHz, Rail-to-Rail Output Operational Amplifiers

OPA1688, OPA1689
SBOS724 – SEPTEMBER 2015
9 Detailed Description
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9.1 Overview
The OPA168x family of operational amplifiers provide high overall performance, making them ideal for many
general-purpose applications. The excellent offset drift of only 1.5 µV/°C (max) provides excellent stability over
the entire temperature range. In addition, the device offers very good overall performance with high CMRR,
PSRR, A_OL, and superior THD.
The Functional Block Diagram section shows the simplified diagram of the OPA168x design. The design
topology is a highly-optimized, three-stage amplifier with an active-feedforward gain stage.
9.2 Functional Block Diagram
PCH
FF Stage
Ca
Cb
+IN
PCH
Input Stage
2^nd Stage
Output
Stage
OUT
-IN
NCH
Input Stage
18
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