AD620参考设计电路|仪表放大器应用电路

AD620是一款低成本、高精度仪表放大器，仅需要一个外部电阻来设置增益，增益范围为1至10,000。此篇主要介绍了AD620特性、应用范围、参考设计电路以及电路分析，帮助大家缩短设计时间。

AD620特性：低噪声；出色的直流性能；出色的交流特性

AD620典型应用范围：电子秤；医疗应用

AD620参考设计应用电路：

图1AD620内部结构图

TheAD620 is a low cost, high accuracy instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. Furthermore, the AD620 features 8-lead SOIC and DIP packaging that is smaller than discrete designs and offers lower power (only 1.3 mA max supply current), making it a good fit for battery-powered, portable (or remote) applications.

图2AD620参考设计图

TheAD620 is a monolithic instrumentation amplifier based on a modification of the classic three op amp approach. Absolute value trimming allows the user to program gain accurately (to 0.15% at G = 100) with only one resistor. Monolithic construction and laser wafer trimming allow the tight matching and tracking of circuit components, thus ensuring the high level of performance inherent in this circuit.

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