Date: 28/09/2011

36V, single-supply, low-noise opamp for automotive apps

Texas Instruments Incorporated (TI) has introduced OPA171-Q1, an automotive-qualified 36-V, single-supply, low-noise op amp (operational amplifier).

According to TI, the OPA171-Q1 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 and 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 as per TI include:
Dynamic input voltage range of +2.7 V to +36 V or +/-1.35 V to +/-18 V allows for greater design versatility across varying supply rails, while still enabling precise, low-voltage sensor outputs.
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.
Low quiescent current of 475 uA enables efficient battery-powered operation.
The SOT-553 micro package option uses 50-percent less board space than comparable op amps, which enables designers to develop smaller modules.

Availability and pricing: The OPA171-Q1 is available now from TI and its authorized distributors. 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 visit: www.ti.com