Op Amp Delivers Precision Measurements

January 22, 2014. Texas Instruments today introduced what the company calls the industry’s first 36-V rail-to-rail input and output (RRIO) operational amplifier (op amp) to achieve 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 applications, including test-and-measurement systems and industrial sensors and controls.

The OPA192 employs e-Trim technology, TI’s patented package-level trimming architecture. The device provides 5-µV offset voltage and 0.2-µV/°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. The device also features 60-mA output current drive and 1-nF capacitive-load drive to provide system stability for high-voltage buffers and muxed data acquisition.

The OPA192 is 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.

Additional support is available on the Precision Amplifier forum in the TI E2E Community, where engineers can search for solutions, get help, share knowledge and solve problems with fellow engineers and TI experts.

The OPA192 is available in the following three package options for a suggested retail price of $1.35 in 1,000-unit quantities: 5-mm by 4-mm SO-8, 3-mm by 3-mm MSOP-8, and 3-mm by 1.75-mm SOT23-5.


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