OPA2180IDRG4 datasheet(21/49 Pages) TI2

21 / 49 page

RFB

RG1

RG2

RISO

CCOMP

VREF

VOUT

CLOAD

DAC8560

Device

OPA180, OPA2180, OPA4180

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SBOS584E – NOVEMBER 2011 – REVISED JUNE 2018

Product Folder Links: OPA180 OPA2180 OPA4180

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9 Application and Implementation

9.1 Application Information

The OPAx180 family offers excellent DC precision and AC performance. These devices operate up to 36-V

supply rails and offer rail-to-rail output, ultra-low offset voltage, offset voltage drift and 2-MHz bandwidth. These

features make the OPAx180 a robust, high-performance amplifier for high-voltage industrial applications.

9.2 Typical Applications

These application examples highlight a few of the circuits where the OPAx180 family can be used.

9.2.1 Bipolar ±10-V Analog Output from a Unipolar Voltage Output DAC

This design is used for conditioning a unipolar digital-to-analog converter (DAC) into an accurate bipolar signal

source using the OPAx180 family and three resistors. The circuit is designed with reactive load stability in mind,

and is compensated to drive nearly any conventional capacitive load associated with long cable lengths.

Figure 30. Circuit Schematic

9.2.1.1 Design Requirements

The design requirements are as follows:

•

DAC supply voltage: +5-V dc

•

Amplifier supply voltage: ±15-V dc

•

Input: 3-wire, 24-bit SPI

•

Output: ±10-V dc

OPA2180IDRG4 Datasheet(PDF) 21 Page - Texas Instruments