AD7888BR-REEL7

Overview

The AD7888BR-REEL7 is an 8-channel, 12-bit successive-approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.7 V to 5.25 V and supports throughput rates up to 125 kSPS with a 2 MHz serial clock. The device features eight single-ended analog inputs, an internal 2.5 V reference, and flexible power management modes including shutdown and standby. It utilizes a serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. The component is housed in a 16-lead TSSOP package and is specified for operation across a temperature range of -40°C to +105°C.

Feature Summary

• Eight single-ended analog input channels multiplexed into an on-chip track-and-hold circuit.
• Flexible power management options allowing automatic power-down after conversion or full shutdown.
• Versatile serial I/O port compatible with multiple industry-standard communication protocols.
• Integrated 2.5 V reference with the capability to accept external reference voltages.

Applications

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

Procurement Notes

Verify that the specific B-grade suffix corresponds to the required differential nonlinearity specifications, specifically the guarantee of no missed codes at 12 bits. Confirm the reel packaging matches the REEL7 designation. Ensure the operating environment falls within the specified -40°C to +105°C temperature range for this version. Cross-reference the datasheet revision to confirm pinout and timing characteristics align with your design requirements.

Selection Notes

Select this component when an 8-channel multiplexed ADC is required in a compact 16-lead package. The B-grade specification ensures guaranteed linearity without missed codes at the full 12-bit resolution. Consider the internal 2.5 V reference if external precision references are not available, or utilize the REF IN/REF OUT pin for external references between 1.2 V and VDD. Evaluate the power consumption profiles against the required throughput rate to optimize battery life in portable applications.

Part Context

The AD7888 series includes variants such as the AD7888ARUZ and AD7888ARZ, which share similar electrical characteristics but differ in package type and grade. The BR suffix indicates a specific manufacturing grade or variant within the AD7888 family. Other related parts include the AD7887, which offers 2 channels, and the AD7818, which provides 1 channel with an integrated temperature sensor. All variants maintain the micropower and high-speed serial interface attributes of the core architecture.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material.