GENERAL DESCRIPTION
●The AD5934 is a high precision impedance converter system solution which 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.
●FEATURES
●Programmable output peak-to-peak excitation voltage to a max frequency of 100 kHz
●Programmable frequency sweep capability with serial I2C® interface
●Frequency resolution of 27 bits (<0.1 Hz)
●Impedance measurement range from 100 Ω to 10 MΩ
●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
●APPLICATIONS
●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
