AD7887ARMZ

Overview

The AD7887ARMZ is a high-speed, low-power 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 an internal 2.5 V reference or external reference capability. It utilizes a successive approximation register (SAR) architecture with a serial interface compatible with SPI, QSPI, Microwire, and DSP standards. The component is housed in an 8-lead MSOP package and is qualified for automotive applications.

Feature Summary

• Configurable dual-channel or single-channel operation via on-chip control register
• Integrated track-and-hold amplifier with 500 ns acquisition time
• Flexible power management including automatic shutdown after conversion
• Read-only ADC capability when DIN pin is tied to ground

Applications

• Battery-powered systems such as personal digital assistants and medical instruments
• Instrumentation and control systems requiring precise data acquisition
• High-speed modem applications utilizing serial communication interfaces

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature range. Ensure compatibility with system voltage requirements and interface protocols before integration. Cross-reference part numbers with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component for designs requiring a compact solution with low power consumption and moderate resolution. Consider the trade-off between sampling rate and power dissipation using the available power management modes. Verify that the input signal range aligns with the selected reference voltage configuration.

Part Context

This device belongs to the AD7887 family of micro-power ADCs. It shares architectural similarities with other SAR converters but distinguishes itself through its integrated reference and flexible serial interface options. The MSOP package provides a small footprint suitable for space-constrained portable electronics.

Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer's portfolio. Evaluate functional equivalents from other vendors ensuring matching resolution, speed, and interface compatibility.