OPA659

650MHz 单位增益稳定 JFET 输入放大器

The combines a very wideband, unity-gain stable, voltage-feedback operational amplifier with a JFET-input stage to offer an ultra-high dynamic range amplifier for high impedance buffering in data acquisition applications such as oscilloscope front-end amplifiers and machine vision applications such as photodiode transimpedance amplifiers used in wafer inspection.

The wide 650-MHz unity-gain bandwidth is complemented by a very high 2550-V/µs slew rate.

The high input impedance and low bias current provided by the JFET input are supported by the low 8.9-nV/&radic:Hz input voltage noise to achieve a very low integrated noise in wideband photodiode transimpedance applications.

Broad transimpedance bandwidths are possible with the high 350-MHz gain bandwidth product of this device.

Where lower speed with lower quiescent current is required, consider the OPA656. Where unity-gain stability is not required, consider the OPA657.

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High Bandwidth: 650 MHz G = 1 V/V

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High Slew Rate: 2550 V/µs 4-V Step

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Excellent THD: –78 dBc at 10 MHz

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Low Input Voltage Noise: 8.9 nV/√Hz

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Fast Overdrive Recovery: 8 ns

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Fast Settling time 1% 4-V Step: 8 ns

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Low Input Offset Voltage: ±1 mV

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Low Input Bias Current: ±10 pA

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High Output Current: 70 mA