OPA838

Product Folder Order Now Technical Documents Tools & Software Support & Community OPA838 SBOS867B – AUGUST 2017 – REVISED OCTOBER 2018 OPA838 1-mA, 300-MHz Gain Bandwidth, Voltage-Feedback Op Amp 1 Features 1 Gain Bandwidth Product: 300 MHz Very-Low (Trimmed) Supply Current: 950 µA Bandwidth: 90 MHz (AV = 6 V/V) High Full-Power Bandwidth: 45 MHz, 4 VPP Negative Rail Input, Rail-to-Rail Output Single-Supply Operating Range: 2.7 V to 5.4 V 25°C Input Offset: ±125 µV (Maximum) Input Offset Voltage Drift: < ±1.6 µV/°C (Maximum) Input Voltage Noise: 1.8 nV/√Hz (> 200 Hz) Input Current Noise: 1 pA/√Hz (> 2000 Hz) < 1-µA Shutdown Current for Power Savings 2 Applications Low-Power Transimpedance Amplifiers Low-Noise High-Gain Stages 12-Bit to 16-Bit Low-Power SAR ADC Drivers High-Gain Active Filter Designs Ultrasonic Flow Meters 3 Description The OPA838 decompensated voltage feedback operational amplifier provides a high 300-MHz gain bandwidth product with 1.8-nV/√Hz input noise voltage, requiring only a trimmed 0.95-mA supply current. These features combine to provide an extremely power-efficient solution for photodiode transimpedance designs and high-voltage gain stages, which require the lowest input voltage noise in signal receiver applications. Operating at the minimum recommended noninverting gain of 6 V/V results in a 90-MHz, –3-dB bandwidth. Extremely low input noise and offset voltage make the OPA838 particularly suitable for high gains....