AD7851ARZ-REEL

Overview

The AD7851ARZ-REEL is a 14-bit, high-speed successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 5 V supply and supports throughput rates of up to 333 kSPS for the A grade and 285 kSPS for the K grade. The device features a pseudo-differential input with selectable voltage ranges and includes on-chip self-calibration and system calibration capabilities. It utilizes a flexible serial interface compatible with SPI, QSPI, and 8051 protocols. The component is housed in a 24-lead SSOP package and is designed for applications requiring low power consumption and high accuracy.

Feature Summary

• Integrated self-calibration and system calibration mechanisms ensure accurate operation over varying time and temperature conditions.
• Flexible serial interface supports multiple communication protocols including SPI, QSPI, and 8051 compatibility.
• Pseudo-differential input architecture allows for two distinct input voltage ranges to accommodate various signal levels.
• Low power dissipation characteristics include a typical normal mode power consumption of 60 mW and a sleep mode consumption of 5 µW.

Applications

• Digital Signal Processing
• Speech Recognition and Synthesis
• Spectrum Analysis
• DSP Servo Control
• Instrumentation and Control Systems

Procurement Notes

Verify the specific grade (A or K) required for your application, as throughput rates differ between versions. Confirm that the SSOP-24 package aligns with your PCB footprint constraints. Ensure that the ordering suffix matches the desired reel packaging format. Check for RoHS compliance status if environmental regulations apply to your manufacturing process. Validate that the operating temperature range meets your system's environmental requirements.

Selection Notes

Select the AD7851ARZ-REEL when a 14-bit resolution and high sampling rate are necessary for precision data acquisition. Consider this component for systems requiring low power consumption during idle states due to its effective power-down modes. Evaluate the need for internal calibration features to simplify system design and maintain long-term accuracy. Ensure that the serial interface timing requirements match your microcontroller or DSP capabilities.

Part Context

The AD7851 series comprises high-speed, 14-bit ADCs designed for versatile data conversion tasks. The ARZ variant specifically denotes a lead-free version packaged in a 24-lead SOIC or SSOP form factor. This part belongs to a family of converters that emphasize ease of use through integrated calibration and flexible interfacing options, catering to industrial and automotive environments.

Replacement Considerations

Direct replacements within the same family include the AD7851ARS and AD7851AR variants, which share identical electrical specifications but may differ in package type or lead composition. Verify pinout compatibility and thermal characteristics when substituting components to ensure seamless integration into existing designs.