Power Electronics

Zero-Crossover Op Amp Enhances Portable Applications

Texas Instruments’ OPA369 is a low-power zero-crossover op amp featuring a unique single-input-stage architecture that simplifies high-performance designs in battery-powered applications. The single-input stage architecture delivers an offset voltage of 750 µV over the entire rail-to-rail input range, and provides a minimum CMRR of 100 dB.

Other features include a noise of 120 nV/√Hz, gain bandwidth of 12 kHz on 1 µA, a maximum input bias current of 50 pA, a maximum low-voltage offset drift of 1.75 µV/°C, PSRR of 94 dB and 1/f noise of 3.6 µV PK-PK (0.1 Hz to 10 Hz). Quiescent current is 1 µA, and operation down to 1.8 V is supported. Pricing for the OPA2369 starts at $1.20 in 1000-piece quantities.

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