OPA837IDBVR2 datasheet(22/64 Pages) TI2

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V IN

OPA837

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OPA837

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OPA837, OPA2837

SBOS673D – SEPTEMBER 2017 – REVISED DECEMBER 2018

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7 Detailed Description

7.1 Overview

The OPA837 and OPA2837 are single- and dual-channel, power efficient, unity-gain stable, voltage-feedback

amplifiers (VFAs). Combining a negative rail input stage and a rail-to-rail output (RRO) stage, the OPAx837

provides a flexible solution where exceptional precision and wide bandwidth at low power are required. This

50-MHz gain bandwidth product (GBP) amplifier requires less than 0.65 mA of supply current per channel over a

2.7-V to 5.4-V total supply operating range. A shutdown feature on the OPA837 6-pin package version provides

power savings where the system requires less than 10 µA when shut down. Offering a unity-gain bandwidth

greater than 100 MHz, the OPAx837 provides less than –118-dBc THD at 100 kHz and a 2-VPP output.

7.2 Functional Block Diagrams

The OPAx837 is a standard voltage-feedback op amp with two high-impedance inputs and a low-impedance

output. Figure 62 and Figure 63 show the supported standard applications circuits. These application circuits are

shown with a DC VREF on the inputs that set the DC operating points for single-supply designs. The VREF is often

ground, especially for split-supply applications.

Figure 62. Noninverting Amplifier

Figure 63. Inverting Amplifier

OPA837IDBVR2 Datasheet(PDF) 22 Page - Texas Instruments