AD5933YRSZ

Overview

The AD5933YRSZ is a high-precision impedance converter system solution manufactured by Analog Devices Inc. It integrates a Direct Digital Synthesis (DDS) frequency generator with a 12-bit, 1 MSPS analog-to-digital converter (ADC). The device operates on a 2.7 V to 5.5 V supply and features a 16-lead SSOP package. Key electrical parameters include a maximum output excitation frequency of 100 kHz, a frequency resolution of 27 bits (<0.1 Hz), and a total system accuracy of 0.5%. It supports an internal oscillator at 16.776 MHz or an external master clock input.

Feature Summary

• Integrates a DDS-based frequency generator for programmable excitation signals up to 100 kHz.
• Includes a 12-bit ADC with 1 MSPS sampling rate and an onboard DSP engine for Discrete Fourier Transform processing.
• Features a serial I2C interface for control and data retrieval of real and imaginary impedance components.
• Contains an internal temperature sensor with ±2°C accuracy across the extended industrial temperature range.

Applications

• Electrochemical analysis
• Bioelectrical impedance analysis
• Impedance spectroscopy
• Corrosion monitoring and protection equipment
• Fuel/battery cell condition monitoring

Procurement Notes

Verify the specific suffix 'YRSZ' corresponds to the 16-lead SSOP package and the Y-grade extended temperature rating (-40°C to +125°C). Confirm that the ordering part number matches the tube packaging format if reel packaging is not required. Ensure compatibility with the target voltage supply range of 2.7 V to 5.5 V during component sourcing.

Selection Notes

Select the AD5933YRSZ when a 1 MSPS sampling rate is required for impedance measurements between 1 kΩ and 10 MΩ. Choose this variant over the AD5934 if higher throughput is necessary, as the AD5934 operates at 250 kSPS. Ensure the application can accommodate the 16-lead SSOP footprint and provides adequate pull-up resistors for the I2C interface lines.

Part Context

The AD5933YRSZ belongs to the AD5933 family of impedance converters from Analog Devices. It is functionally similar to the AD5934 but offers a higher sampling rate of 1 MSPS compared to the AD5934's 250 kSPS. Both devices share the same 16-lead SSOP package and core architecture, differing primarily in conversion speed and specific performance characteristics under varying load conditions.

Replacement Considerations

The AD5934 is a compatible alternative within the same product family, offering identical functionality at a reduced sampling rate of 250 kSPS. Verify that the lower throughput of the AD5934 meets the dynamic requirements of the specific impedance measurement application before substitution.

FAQ

How is the impedance magnitude calculated using the AD5933?

The device outputs real (R) and imaginary (I) data words via the I2C interface after performing a Discrete Fourier Transform. The impedance magnitude is calculated off-chip using the formula: Magnitude = √(R² + I²).

What is the maximum excitation frequency supported by the AD5933?

The AD5933 supports a programmable output peak-to-peak excitation voltage to a maximum frequency of 100 kHz.

Does the AD5933YRSZ support automotive applications?

Yes, the datasheet indicates that the AD5933 is qualified for automotive applications.