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Применения > > High Accuracy Impedance Measurements Using 12-Bit Impedance Converters

High Accuracy Impedance Measurements Using 12-Bit Impedance Converters (CN0217)

The AD5933 and AD5934 are high precision impedance converter system solutions that combine an on-chipprogrammable frequency generator with a 12-bit, 1 MSPS (AD5933) or 250 kSPS (AD5934) analog-to-digital converter (ADC). The tunable frequency generator allows an external complex impedance to be excited with a known frequency.


The circuit shown in Figure 1 yields accurate impedance measurements extending from the low ohm range to several hundred kΩ and also optimizes the overall accuracy of the AD5933/AD5934.



Figure 1. Optimized Signal Chain for Impedance Measurement Accuracy (Simplified Schematic, All Connections and Decoupling Not Shown)

Возможности

  • High accuracy impedance measurement
  • Complex impedance measurments using internal frequency generator
  • Measure up to several hundred k-ohms

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Схемы и диаграммы

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High Accuracy Impedance Measurements Using 12-Bit Impedance Converters  CN0217

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