AD5934

www.DataSheet4U.com 250 kSPS, 12-Bit Impedance Converter, Network Analyzer AD5934 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 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. The magnitude of the impedance and relative phase of the impedance at each frequency point along the sweep is easily calculated using the following two equations: 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 Magnitude = ...