TI introduces 36-volt op amp for the automotive market

September 21, 2011 // By Christoph Hammerschmidt
Texas Instruments Incorporated has introduced an automotive-qualified 36-V, single-supply, low-noise op amp (operational amplifier) that can operate on supplies ranging from +2.7 V to +36 V.

The OPA171-Q1 offers high-precision performance in a cost-effective, low-power device. In addition to industry-standard packaging, the device is available for automotive qualification in the SOT-553 micro package, which is 50-percent smaller than comparable devices available today, and can reduce board space for automotive applications including HEV/EV, tracking amplifiers in power modules, and transducer amplifiers.

The op amp offers features designed to enhance overall system design stability, such as the ability to handle input signals beyond the supply rails without causing output phase reversal. The OPA171-Q1 remains stable when exposed to capacitive loads up to 300 pF or when the input operates 100 mV below the negative rail and within 2 V of the top rail during normal operation.

Key features and benefits of the OPA171-Q1 include a dynamic input voltage range of +2.7 V to +36 V or ±1.35 V to ±18 V which allows for greater design versatility across varying supply rails, while still enabling precise, low-voltage sensor outputs. In addition, the OPA171-Q1 provides precision performance, including low offset of up to 1.8 mV, typical drift of 0.3 uV/C and wide gain bandwidth of 3 Mhz. The low quiescent current of 475 uA enables efficient battery-powered operation. And the SOT-553 micro package option uses 50-percent less board space than comparable op amps, which enables designers to develop smaller modules.

The OPA171-Q1 is available now. It is offered in a 5-pin SOT-23 package and is qualified to automotive grade. The OPA171-Q1 is priced at $0.47 in quantities of 1,000. The SOT-553 micro package option can be qualified to automotive grade. Additionally, the OPA171-Q1 is part of a family of 1-, 2-, and 4-channel devices (OPA171, OPA2171 and OPA4171) that can be qualified to automotive grade.

For more information and to order samples, visit www.ti.com/opa171-q1-preu.