AD7887BR-REEL7

Overview

The AD7887BR-REEL7 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 supply and supports throughput rates up to 125 kSPS. The device features two single-ended analog input channels and utilizes a successive approximation register (SAR) architecture. It includes an internal 2.5 V reference or accepts external references between 2.5 V and VDD. The component is housed in an 8-lead MSOP package and communicates via a serial interface compatible with SPI, QSPI, Microwire, and DSP standards.

Feature Summary

• Configurable for single-channel or dual-channel operation using on-chip control registers.
• Flexible power management options including automatic shutdown after conversion.
• Capable of read-only ADC operation when the data input line is tied to ground.
• Supports full-power signal conversion up to 2.5 MHz bandwidth.

Applications

• Battery-powered systems such as personal digital assistants and mobile communications devices.
• Medical instruments requiring low power consumption and high resolution.
• Instrumentation and control systems needing precise analog signal digitization.
• High-speed modem applications utilizing serial data interfaces.

Procurement Notes

Verify the specific suffix REEL7 indicates tape and reel packaging upon ordering. Confirm that the B version meets the required DC accuracy specifications, particularly regarding integral and differential nonlinearity limits compared to the A version. Ensure compatibility with the target system's voltage levels and serial clock frequencies before finalizing procurement.

Selection Notes

Select this component when a compact 12-bit ADC with dual-channel capability is required. The B version offers improved linearity specifications compared to the A version. Consider the MSOP package size for space-constrained designs. Verify that the operating temperature range of -40°C to +125°C aligns with the environmental conditions of the intended application.

Part Context

The AD7887 series represents a family of micropower ADCs designed for portable electronics. The BR variant specifically denotes the B grade performance level within the 8-lead MSOP package configuration. This part is distinct from the SOIC package versions and shares core functional characteristics with other members of the AD7887 family while differing in manufacturing tolerances.

Replacement Considerations

The AD7887ARZ is listed as a parameter equivalent alternative. Verify pinout compatibility and package dimensions when substituting. Check if the A grade specifications meet the design requirements if replacing the B grade part.