ADI AD5934YRSZ-REEL7

The AD5934 is a high precision impedance converter system solution that combines an on-board frequency generator with a 12-bit, 250 kSPS, analog-to-digital converter (ADC). The frequency generator allows an external complex impedance to be excited with a known frequency. The response signal from the impedance is sampled by the on-board ADC and a discrete Fourier transform (DFT) is processed by an on-board DSP engine. The DFT algorithm returns a real (R) and imaginary (I) data-word at each output frequency.

• Programmable output peak-to-peak excitation voltage to a maximum frequency of 100 kHz
• Programmable frequency sweep capability with serial I2C
• Frequency resolution of 27 bits (< 0.1 Hz)
• Impedance measurement range from 1 kΩ to 10 MΩ
• Capable of measuring 100 Ω to 1 kΩ with additional circuitry
• Phase measurement capability
• System accuracy of 0.5%
• 2.7 V to 5.5 V power supply operation
• Temperature range: -40°C to +125°C
• 16-lead SSOP package

• Electrochemical analysis
• Bioelectrical impedance analysis
• Impedance spectroscopy
• Complex impedance measurement
• Corrosion monitoring and protection equipment
• Biomedical and automotive sensors
• Proximity sensing
• Nondestructive testing
• Material property analysis
• Fuel/battery cell condition monitoring