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AD5933, impedance converter, network analyzer, qty 2


Contact Information: bonniesimpson@oklahomaselltoday.com (Bonnie Simpson)
What is for sale: AD5933, impedance converter, network analyzer, qty 2
AD5933YRSZ, 1 MSPS, 12 Bit Impedance Converter Network Analyzer, 16 Pin SSOP, Lead-Free, Quantity 2, Analog Devices.
The AD5933 is a high precision impedance converter system solution which combines an on board frequency generator with a 12-Bit 1 MSPS 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 FFT processed by an onboard DSP engine. The FFT algorithm returns a Real (R) and Imaginary (I) data word, allowing impedance to be conveniently calculated.
The impedance magnitude and phase is easily calculated using the following equations:
To determine the actual real impedance value Z(W) , generally a frequency sweep is performed. The impedance can be calculated at each point and a frequency vs magnitude plot can be created.
The system allows the user to program a 2V PK-PK sinusoidal signal as excitation to an external load. Output ranges of 1V, 500mV, 200mV can also be programmed. The signal is provided on chip using DDS techniques. Frequency resolution of 27 bits (less than 0.1 HZ) can be achieved. The clock for the DDS can be generated from an external reference clock, an internal RC oscillator or an internal PLL. The PLL has a gain stage of 512 and typically needs a reference clock of 32 kHz on the MCLK pin.
To perform the frequency sweep, the user must first program the conditions required for the sweep; start frequency, delta frequency, step frequency, etc. A Start Command is then required to begin the sweep.
At each point on the sweep the ADC will take 1024 samples and calculate a Discrete Fourier Transform to provide the real and imaginary data for the waveform. The real and imaginary data is available to the user through the 12C interface.
To determine the impedance of the load at any one frequency point, Z(w), a measurement system comprised of a trans impedance amplifier, gain stage and ADC are used to record data. The gain stage for the response stage is 1 or 5.
The ADC is a low noise, high speed 1 MSPS sampling ADC that operates from a 3 V supply. Clocking for both the DDS and ADC signals is provided externally via the MCLK reference clock, which is provided externally from a crystal oscillator.
* Impedance range: 100 Ohms to 10 MOhms
* Programmable excitation frequency sweep (up to 100 kHz)
* Selectable system clock: Internal RC oscillator or external clock
* Real and Imaginary components of each frequency generated (DFT)
* Frequency resolution 27 bits (<0.1 Hz)
* Predetermined frequency sweep capability
* ADC sampling 1 MSPS, INL ±1 LSB max
* On Chip temp sensor allows ±2ºC accuracy
* Battery Condition Monitoring
* Fuel Cell Condition Monitoring
* Corrosion Analysis and Protection Equipment
* Bioelectrical Impedance Analysis
* Sensor and Biosensor Signal Processing
* Material Property Analysis
Click here to see the datasheet.
Quantity 2 ....... New Parts !!!!!
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Contact bonniesimpson@oklahomaselltoday.com (Bonnie Simpson) for more information. All emails will be forwarded to the poster's actual email address.