English

The AD5933 and AD5934 are the world's first integrated impedance converters, combining a precision on-board frequency generator with 12-bit 1 MSPS (AD5933) and 250 KSPS (AD5934) ADCs. The frequency generator allows an external complex impedance (range 100 Ω to 10 M Ω) to be excited with a known frequency of up to approximately 100 kHz. The response signal from the impedance is sampled by the on-board ADC and DFT processed by an on-board DSP engine. The DFT algorithm returns a real (R) and imaginary (I) data word at each frequency point, (in the case of a sweep) allowing impedance to be conveniently calculated based on an initial system calibration.

For more information AD5933 and AD5934 Demonstration and Design Tool. This tool demonstrates the configuation and operation of the AD5933 and AD5934 impedance converter/network analyzers. Impedance-to-Digital Converters–Compact and Easy to Use The AD5933 provides a single chip system level solution for impedance conversion. This integrated solution delivers unprecedented levels of precision and accuracy, available in a small package, requiring less design time, and at lower overall cost and power. (pdf, 695,640 bytes)

Impedance Converter Selection Table

Part #	Impedance Range	Resolution (Bits)	Power Supply	Temperature Range	Sampling Speed	On Chip Oscllator	Temp Sensor	Price (1K Unit)	Samples
AD5933	100 Ohms to 10 MOhms	12	3 V / 5 V	-40°C to 125°C	1 MSPS	Yes	Yes	$6.65	Order Samples
AD5934	100 Ohms to 10 MOhms	12	3 V / 5 V	-40°C to 125°C	250 kSPS	-	-	$4.35	Order Samples

Technical Articles

Recent Developments for SAR and Sigma Delta ADCs (Industrial Control DesignLine)

Which ADC Architecture Is Right for Your Application? (Analog Dialogue, June 2005)

Product Reviews

ADI Rolls Out Single-Chip Converters for Precise Capacitance and Impedance Measurements

Questions?

Please contact the IDC Development Group.