AD7887ARZ-REEL

Overview

The AD7887ARZ-REEL is a micropower, 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 2.7 V to 5.25 V power supply and supports throughput rates up to 125 kSPS. The device features two single-ended analog inputs and utilizes a successive approximation register (SAR) architecture with an internal track-and-hold circuit that acquires signals in 500 ns. It offers flexible serial interface compatibility including SPI, QSPI, Microwire, and DSP modes. The component is available in an 8-lead MSOP package and includes programmable power management options.

Feature Summary

• Configurable for either single-channel or dual-channel operation via an on-chip control register.
• Includes an internal 2.5 V reference voltage source or allows external reference overdrive.
• Supports multiple low-power operating modes, including automatic shutdown after conversion.
• Capable of converting full-power input signals with frequencies up to 2.5 MHz.

Applications

• Battery-powered systems such as personal digital assistants and mobile communications devices
• Medical instruments requiring low power consumption
• Instrumentation and control systems
• High-speed modems

Procurement Notes

Verify the specific suffix 'REEL' indicates tape and reel packaging when sourcing components. Confirm the grade version (A or B) matches the required temperature range and linearity specifications. Ensure the ordering part number corresponds to the MSOP package variant rather than the SOIC variant. Cross-reference the manufacturer's latest datasheet revision to confirm pinout and electrical characteristics remain consistent with current design requirements.

Selection Notes

Select this component for applications requiring a small footprint and low power consumption in 12-bit resolution scenarios. Consider the AIN1/VREF pin functionality, which serves as a second analog input in dual-channel mode or a reference input/output in single-channel mode. Evaluate the power management bits to optimize energy usage based on the required sampling rate. Ensure the system clock frequency aligns with the maximum 2 MHz SCLK specification for optimal performance.

Part Context

The AD7887 series represents a family of high-speed, low-power ADCs designed for portable and battery-operated electronics. The AD7887ARZ-REEL specifically denotes the automotive-grade or standard industrial version packaged in reels for automated surface-mount assembly. It shares architectural similarities with other members of the AD788x family but is distinct in its channel count and package configuration compared to higher-channel variants like the AD7888.

Replacement Considerations

AD7887BRZ