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Updated: July 8th, 2008 05:26 PM CDT

TI Unveils Lowest Power Zero-Crossover Op Amp for Battery-Powered, Portable Applications

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via PRNewswire

DALLAS , Aug. 27 /PRNewswire/ -- Texas Instruments Incorporated (TI)(NYSE: TXN) today introduced the industry's lowest power zero-crossoveroperational amplifier (op amp). Featuring a unique single-input-stagearchitecture, the OPA369 achieves rail-to-rail performance without inputcrossover to solve the common design problem of input offset distortion due tothe change in common mode voltage that is very prominent in low-voltage,rail-to-rail applications. Combined with 1uA quiescent current, SC70 packageand operation down to 1.8V, the OPA369 simplifies high-performance designs inbattery-powered, portable products. (See http://www.ti.com/opa369-pr.)

"The OPA369 utilizes TI's innovative zero-crossover topology andnext-generation CMOS process technology to offer precision performancepreviously unavailable in 1uA single-supply amplifiers," said Art George ,senior vice president of TI's high-performance analog business. "Typically,designers are forced to choose between power consumption and the AC or DCperformance of their signal conditioning amplifiers. The OPA369 will enablecustomers to increase the precision in their portable applications withoutcomplicating the design or increasing their power budget."

The single-input stage architecture delivers outstanding offset voltage of750uV over the entire rail-to-rail input range and a common-mode rejectionratio (CMRR) of 100dB minimum, thereby maximizing the useable input dynamicrange for low supply voltage applications. Other features include low noise of120nV/rtHz, gain bandwidth of 12kHz on 1uA, low input bias current of 50pAmaximum, low voltage offset drift of 1.75uV/C (max), PSRR of 94dB and low 1/fnoise of 3.6uVp-p (0.1 to 10Hz)

The OPA369 offers the precision, low power and small packaging required ina wide variety of applications such as portable medical devices (glucosemeters, oxygen metering), portable instrumentation (gas detection/monitoring,handheld test equipment), sensor signal conditioning and portable consumerdevices. TI provides customers with a state-of-the-art signal chain solutionfor portable applications: analog-to-digital converters such as the ADS1100;digital-to-analog converters such as the DAC8811; and precision voltagereferences such as the REF33xx. The OPA369 is also optimized to work with TI'sMSP430 ultra-low-power microcontroller family.

Availability and Packaging

The dual OPA2369 is available now from TI and its authorized distributorsin SOT23-8 and MSOP-8 packages. Suggested resale pricing for the OPA2369starts at $1.20 in 1,000-piece quantities.

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