OPA656 is a broadband, unity gain stable, field-effect transistor input operational amplifier 1

feature

● 500MHz unit gain bandwidth

Low input bias current: 2pA

Low offset and drift: ± 0.25mV, ± 2 μ V/° C

Low distortion: 74dB SFDR at 5MHz

● High output current: 70mA

Low input voltage noise: 7nV/√ Hz

application

Broadband photodiode amplifier

● Sample and hold buffer

CCD output buffer

ADC input buffer

● Broadband precision amplifier

● Measurement and testing

describe

OPA656 combines a very wideband, unified gain stable, voltage feedback operational amplifier, and FET input stage, providing an ultra-high dynamic range amplifier for ADC (Analog to Digital Converter) buffering and transient applications. Extremely low DC error has good accuracy in optical applications.  diode

High unity gain stable bandwidth and JFET input allow for excellent performance in high-speed low-noise integrators.

High input impedance and low bias current are supported by FET input and ultra-low 7nV/√ Hz input voltage noise to achieve very low integrated noise in transient applications of broadband photodiodes.diode

Given OPA656's high 230MHz gain bandwidth product, it can achieve a wide transient bandwidth. As shown in the figure below, even with a high 1M Ω transient gain of a 47pF source capacitor, it still provides a 1-3dB bandwidth of 1MHz.

Related operational amplifier productsdiode