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S7-1200之间S7通讯样例

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AD620 使用问题 AD620 使用问题 AD620 使用问题

AD621 Low Drift, Low Power Instrumentation AmplifierThe AD621 is an easy to use, low cost, low power, high accu- When operating from high source impedances, as in ECG and racy instrumentation amplifier which is ideally suited for a wide blood pressure monitors, the AD621 features the ideal combina- range of applications. Its unique combination of high perfor- tion of low noise and low input bias currents. Voltage noise is mance, small size and low power, outperforms discrete in amp specified as 9 nV/? Hz at 1 kHz and 0.28 ?V p-p from 0.1 Hz to implementations.