AD5933YRSZ-REEL7

Overview

The AD5933YRSZ-REEL7 is a high-precision impedance converter system solution from Analog Devices, packaged in a 16-lead SSOP. It integrates a Direct Digital Synthesis (DDS) frequency generator with a 12-bit, 1 MSPS analog-to-digital converter (ADC). The device excites external complex impedances with known frequencies and processes the response signals using an on-board DSP engine to perform a Discrete Fourier Transform (DFT). This yields real and imaginary data words for impedance magnitude and phase calculations via a serial I2C interface. Key specifications include a 2.7 V to 5.5 V supply range, -40°C to +125°C operating temperature, and 0.5% system accuracy.

Feature Summary

• Integrates a programmable DDS frequency generator with a 12-bit ADC and on-chip DSP engine for complete signal processing.
• Supports frequency sweeps with user-defined start frequencies, increments, and point counts via a serial I2C interface.
• Includes an internal temperature sensor with ±2°C accuracy across the extended industrial temperature range.
• Provides four selectable output excitation voltage ranges to accommodate various impedance levels.

Applications

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

Procurement Notes

Verify the specific suffix REEL7 indicates tape-and-reel packaging when sourcing components. Confirm that the Y-grade designation ensures operation within the extended industrial temperature range of -40°C to +125°C. Ensure compatibility with the 16-lead SSOP footprint during PCB layout planning. Cross-reference the manufacturer's latest datasheet revision for any updates to absolute maximum ratings or electrical characteristics before finalizing procurement orders.

Selection Notes

Select this component for applications requiring integrated impedance measurement without discrete DSP hardware. The 1 MSPS sampling rate supports frequency sweeps up to 100 kHz. Consider the 12-bit resolution for required measurement precision. Verify that the I2C interface meets the host controller's speed requirements. Evaluate the need for external circuitry if measuring impedances below 1 kΩ, as the standard range starts at 1 kΩ.

Part Context

The AD5933 belongs to a family of impedance converters designed to simplify network analyzer implementations. It serves as a single-chip solution replacing traditional discrete methods, reducing board area. The Y-grade variant specifically targets automotive and industrial environments requiring extended temperature stability. It is often paired with evaluation boards like the EVAL-AD5933EBZ for rapid prototyping and design verification.

Replacement Considerations

The AD5934 is a similar device offering 250 kSPS sampling speed in the same package. Verify if the lower bandwidth of the AD5934 suffices for the application. Check pinout compatibility between variants to ensure direct replacement feasibility without schematic modifications.