OPA820

单位增益稳定低噪声电压反馈运算放大器

The device provides a wideband, unity-gain stable, voltage-feedback amplifier with a very-low input-noise voltage and high-output current using a low 5.6-mA supply current. At unity-gain, the OPA820 device gives more than 800-MHz bandwidth with less than 1-dB peaking. The OPA820 device complements this high-speed operation with excellent DC precision in a low-power device. A worst-case input-offset voltage of ±750 µV and an offset current of ±400 nA provide excellent absolute DC precision for pulse amplifier applications.

Minimal input and output voltage-swing headroom allow the OPA820 device to operate on a single 5-V supply with more than 2-VPP output swing. While not a rail-to-rail RR output, this swing supports most emerging analog-to-digital converter ADC input ranges with lower power and noise than typical RR output op amps.

Exceptionally low dG/dP 0.01% or 0.03° supports low-cost composite-video line-driver applications. Existing designs can use the industry-standard pinout, 8-pin SOIC package while emerging high-density portable applications can use the 5-pin SOT-23. Offering the lowest thermal impedance of the industry in a SOT package, along with full specification over both the commercial and industrial temperature ranges, provides solid performance over a wide temperature range.

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High Bandwidth 240 MHz, G = 2

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High-Output Current ±110 mA

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Low-Input Noise 2.5 nV/√Hz

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Low-Supply Current 5.6 mA

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Flexible Supply Voltage:

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Dual ±2.5 V to ±6 V

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Single 5 V to 12 V

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Excellent DC Accuracy:

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Maximum 25°C Input Offset Voltage = ±750 µV

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Maximum 25°C Input Offset Current = ±400 nA