Texas Instruments OPA369 Zero-Crossover Op Amp

Texas Instruments Incorporated’s (TI) (NYSE: TXN) OPA369 is the industry’s lowest power zero-crossover operational amplifier (op amp). The OPA369 features a unique single-input-stage architecture and achieves rail-to-rail performance without input crossover to solve the common design problem of input offset distortion due to the change in common mode voltage that is very prominent in low-voltage, rail-to-rail applications. Combined with 1uA quiescent current, SC70 package and operation down to 1.8V, the OPA369 simplifies high-performance designs in battery-powered, portable products.

Texas Instruments OPA369 Zero-Crossover Operational AmplifierThe OPA369 offers the precision, low power and small packaging required in a wide variety of applications such as portable medical devices (glucose meters, oxygen metering), portable instrumentation (gas detection/monitoring, handheld test equipment), sensor signal conditioning and portable consumer devices.

The single-input stage architecture delivers outstanding offset voltage of 750uV over the entire rail-to-rail input range and a common-mode rejection ratio (CMRR) of 100dB minimum, thereby maximizing the useable input dynamic range for low supply voltage applications. Other features include low noise of 120nV/rtHz, gain bandwidth of 12kHz on 1uA, low input bias current of 50pA maximum, low voltage offset drift of 1.75uV/C (max), PSRR of 94dB and low 1/f noise of 3.6uVp-p (0.1 to 10Hz).

The dual OPA2369 is available now from TI and its authorized distributors in SOT23-8 and MSOP-8 packages. Suggested resale pricing for the OPA2369 starts at $1.20 in 1,000-piece quantities. The single OPA369 is sampling now, with volume production scheduled for 4Q 2007. The device is available in an SC70-5 package and suggested resale pricing starts at $0.80 in 1,000-piece quantities.

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