AD7859APZ-REEL

Overview

The AD7859APZ-REEL is a high-speed, low-power, 8-channel, 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 3 V to 5.5 V power supply and features a throughput rate of 200 kSPS with a typical normal mode power dissipation of 15 mW at 3 V. The device utilizes a successive approximation register (SAR) architecture and includes an on-chip track-and-hold amplifier that acquires signals in 500 ns. It supports flexible parallel interfaces for both 16-bit and 8-bit data transfers. Key performance specifications include a signal-to-noise ratio of 71 dB minimum, integral nonlinearity of ±0.5 LSB maximum, and differential nonlinearity of ±1 LSB maximum.

Feature Summary

• Integrated self-calibration and system calibration options ensure accurate operation over time and temperature variations.
• Flexible power management capabilities including automatic power-down after conversion for optimized energy efficiency.
• Versatile parallel I/O port supporting both 16-bit word and 8-bit byte transfer modes via the W/B pin.

Applications

• Battery-powered systems such as personal digital assistants and mobile communications devices
• Medical instruments requiring precise analog signal acquisition
• Instrumentation and control systems

Procurement Notes

Verify the specific REEL suffix against the manufacturer's current ordering guide to confirm packaging details and reel specifications. Ensure compatibility with existing inventory management systems regarding tape-and-reel quantities. Cross-reference the component marking with official datasheet documentation to validate authenticity before integration into production workflows.

Selection Notes

Select this component when an 8-channel multiplexed input is required alongside high-speed sampling capabilities. The AD7859 variant is appropriate for designs prioritizing maximum throughput rates up to 200 kSPS. Consider the available 44-pin PLCC or PQFP packages based on board space constraints and thermal requirements for the target application environment.

Part Context

This part belongs to the AD7859 family of 12-bit ADCs, which also includes the AD7859L optimized for lower power consumption. The AD7859 series provides a balance of speed and power efficiency suitable for portable applications. The APZ designation indicates a specific package type and temperature range within the broader product line managed by Analog Devices.

Replacement Considerations

The AD7859BSZ serves as a direct functional substitute within the same family, offering identical electrical characteristics but housed in a PQFP-44 package instead of the PLCC-44 configuration found in the APZ version. Verify pinout compatibility and thermal impedance differences when transitioning between these package styles.