AD7887AR-REEL7

Overview

The AD7887AR-REEL7 is a micropower, 12-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 2.7 V to 5.25 V supply and supports throughput rates up to 125 kSPS with a 2 MHz serial clock. The device features two single-ended analog inputs configurable via an on-chip control register for either single-channel or dual-channel operation. In single-channel mode, the AIN1/VREF pin functions as a reference input/output, supporting internal or external references between 1.2 V and VDD. In dual-channel mode, it serves as a second analog input with a range of 0 V to VDD. The part includes flexible power management options, including shutdown modes consuming 1 μA max, and is housed in an 8-lead MSOP package.

Feature Summary

• Configurable single-channel or dual-channel operation via software control register
• Integrated track-and-hold amplifier with 500 ns acquisition time
• Flexible power management with automatic shutdown after conversion
• SPI/QSPI/MICROWIRE/DSP compatible serial interface

Applications

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

Procurement Notes

Verify the specific ordering suffix AR-REEL7 against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure compatibility with system voltage rails within the 2.7 V to 5.25 V range. Confirm that the MSOP-8 footprint matches the design layout. Check for automotive qualification requirements if applicable to the target application environment.

Selection Notes

Select this component when a small form factor 12-bit ADC with low power consumption is required. It is suitable for applications needing either one or two single-ended inputs without differential signaling. Consider the internal 2.5 V reference for single-channel designs or external references for dual-channel setups. Evaluate power-down modes to optimize battery life in portable devices.

Part Context

The AD7887 belongs to Analog Devices' family of micropower, high-speed ADCs. It is designed for applications where space and power are critical constraints. The device integrates a SAR architecture with a charge-redistribution DAC. It is commonly paired with microcontrollers for data acquisition tasks in embedded systems.

Replacement Considerations

Check for direct pin-compatible replacements within the AD7887 series, such as different temperature grades or packaging options. Verify electrical specifications match if substituting with other 12-bit SAR ADCs.