TI OPA656NB/250

The OPA656 device combines a very wideband, unity-gain stable, voltage-feedback operational amplifier with a FET-input stage to offer an ultra high dynamic-range amplifier for Analog-to-Digital Converter (ADC) buffering and transimpedance applications. Extremely low DC errors give good precision in optical applications. The high unity-gain stable bandwidth and JFET input allows exceptional performance in high-speed, lownoise integrators. The high input impedance and low bias current provided by the FET input is supported by the ultralow 7-nV/√Hz input voltage noise to achieve a very low integrated noise in wideband photodiode transimpedance applications. Broad transimpedance bandwidths are achievable given the OPA656 device’s high 230-MHz gain bandwidth product.

• 500 MHz Unity-gain Bandwidth
• Low Input Bias Current: 2 pA
• Low Offset And Drift: ±250 μV, ±2 μV/°C
• Low Distortion: 74-dB SFDR at 5 MHz
• High-Output Current: 70 mA
• Low Input Voltage Noise: 7 nV/√Hz

• Wideband Photodiode Amplifiers
• Sample-and-Hold Buffers
• CCD Output Buffers
• ADC Input Buffers
• Wideband Precision Amplifiers
• Test and Measurement Front Ends