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AD5933 Datasheet(PDF) 1 Page - Analog Devices |
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AD5933 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 40 page  1 MSPS, 12-Bit Impedance Converter, Network Analyzer Data Sheet AD5933 Rev. E Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2005–2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Programmable output peak-to-peak excitation voltage to a maximum frequency of 100 kHz Programmable frequency sweep capability with serial I2C interface Frequency resolution of 27 bits (<0.1 Hz) Impedance measurement range from 1 kΩ to 10 MΩ Capable of measuring of 100 Ω to 1 kΩ with additional circuitry Internal temperature sensor (±2°C) Internal system clock option 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 Qualified for automotive applications 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 GENERAL DESCRIPTION The AD5933 is a high precision impedance converter system solution that combines an on-board frequency generator with a 12-bit, 1 MSPS, 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. Once calibrated, the magnitude of the impedance and relative phase of the impedance at each frequency point along the sweep is easily calculated. This is done off chip using the real and imaginary register contents, which can be read from the serial I2C interface. A similar device, also available from Analog Devices, Inc., is the AD5934, a 2.7 V to 5.5 V, 250 kSPS, 12-bit impedance converter, with an internal temperature sensor and is packaged in a 16- lead SSOP. FUNCTIONAL BLOCK DIAGRAM VDD/2 DAC Z(ω) SCL SDA DVDD AVDD MCLK AGND DGND ROUT VOUT AD5933 RFB VIN 1024-POINT DFT I2C INTERFACE IMAGINARY REGISTER REAL REGISTER OSCILLATOR DDS CORE (27 BITS) TEMPERATURE SENSOR ADC (12 BITS) LPF GAIN Figure 1. |
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