Op amp delivers high precision measurements for industrial apps - Embedded.com

Op amp delivers high precision measurements for industrial apps

The OPA192 from Texas Instruments is a 36-V rail-to-rail input and output (RRIO) operational amplifier (op amp) that achieves precision offset voltage and drift without using auto-zero techniques. The OPA192 achieves stable offset voltage drift over the full specified temperature range, which eliminates the need for system level calibration. Fast settling and high-output drive, combined with precision, allows designers to use the device to drive analog-to-digital converters (ADCs) in high-voltage, precision data acquisition systems including test and measurement, and industrial sensors and controls.

Using e-TrimTM technology, TI’s patented package-level trimming architecture, the device provides 5-uV offset voltage and 0.2-uV/C offset drift over temperature without the use of internally clocked auto-zero techniques, which increases the accuracy of industrial sensor signal conditioning. RRIO enables maximum input dynamic range for precision high-voltage measurement in industrial automation and control applications. A 60-mA output current drive and 1-nF capacitive-load drive provide system stability for high-voltage buffers and muxed data acquisition.

The OPA192 is included in four new TI Precision Designs reference design to help engineers quickly evaluate and customize a system:

A TINA-TI SPICE model is also available with TI Precision Design circuits to accurately simulate and debug the circuit.

The OPA192 utilizes a DIP adapter evaluation module or a universal op amp evaluation module to quickly evaluate the functionality and versatility of the device.

The OPA192 is also supported by TI's WEBENCH Filter Designer, an online tool that enables engineers to design, optimize, and simulate complete multi-stage active filter solutions within minutes.

For more information or to order samples and an evaluation module (EVM), see www.ti.com/opa192-pr.

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