AD7888BRZ-REEL7

Overview

The AD7888BRZ-REEL7 is a micropower, 12-bit analog-to-digital converter featuring eight single-ended inputs and a 125 kSPS throughput rate. It operates from a single 2.7 V to 5.25 V supply with typical power dissipation of 3.5 mW in normal mode and 10 µW in shutdown. The device utilizes a successive-approximation architecture with an on-chip 2.5 V reference or external reference capability (1.2 V to VDD). It supports SPI/QSPI/MICROWIRE/DSP serial interfaces and is housed in a 16-lead TSSOP package.

Feature Summary

• Eight single-ended analog input channels multiplexed into an internal track-and-hold circuit.
• Flexible power management options including automatic shutdown after conversion and standby modes.
• Integrated 2.5 V reference voltage source accessible via the REF IN/REF OUT pin.
• Serial interface compatible with standard microcontroller protocols for data transfer.

Applications

• Battery-powered systems such as personal digital assistants and mobile communications devices.
• Medical instruments requiring low power consumption and moderate speed.
• Instrumentation and control systems needing multi-channel signal acquisition.

Procurement Notes

Verify the specific grade version (A or B) against project requirements, as specifications like differential nonlinearity and offset error limits differ between versions. Confirm that the REEL7 suffix indicates tape and reel packaging suitable for automated assembly processes. Ensure the operating temperature range aligns with the intended environmental conditions.

Selection Notes

Select this component when an 8-channel multiplexed ADC is required within a compact 16-lead footprint. Consider the trade-off between the 125 kSPS maximum sampling rate and the micropower consumption profile. Evaluate whether the internal 2.5 V reference meets accuracy needs or if an external precision reference is necessary for optimal performance.

Part Context

This part belongs to the AD7888 family of high-speed, low-power ADCs manufactured by Analog Devices Inc. It shares architectural similarities with other members of the series but is distinguished by its specific 12-bit resolution and eight-channel configuration. The BRZ suffix typically denotes a specific package variant and compliance status within the broader product line.

Replacement Considerations

Direct replacements include the AD7888ARZ and AD7888ARUZ, which share identical electrical specifications and pinouts but differ in package type (SOIC vs. TSSOP). Verify pin compatibility and thermal characteristics when substituting packages. Cross-vendor alternatives like the ADS7888 offer different resolution and speed profiles and require schematic redesign.