AD7888ARU-REEL7

Overview

The AD7888ARU-REEL7 is an 8-channel, 12-bit successive-approximation analog-to-digital converter (ADC) from Analog Devices. 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 a flexible serial interface compatible with SPI, QSPI, Microwire, and DSP standards. Packaged in a 16-lead TSSOP, it offers low power consumption of typically 3.5 mW in normal operation and includes multiple power-down modes for efficient energy management.

Feature Summary

• Integrates an 8-channel multiplexer with an on-chip track-and-hold amplifier and SAR ADC architecture.
• Supports versatile serial communication protocols including SPI, QSPI, Microwire, and DSP interfaces.
• Provides flexible power management options such as automatic shutdown after conversion and standby mode.
• Features an accessible on-chip 2.5 V reference or allows external reference input via the REF IN/REF OUT pin.

Applications

• Battery-powered systems like personal digital assistants and medical instruments
• Instrumentation and control systems requiring multi-channel data acquisition
• High-speed modem applications

Procurement Notes

Verify the specific ordering suffix REEL7 corresponds to the reel packaging format when sourcing components. Confirm that the A-version specifications meet the required linearity and accuracy thresholds for the intended application. Ensure compatibility with the system's logic voltage levels and serial clock frequencies before finalizing procurement decisions.

Selection Notes

Select this component for designs requiring an 8-channel ADC with minimal footprint in a 16-lead package. Consider the internal reference stability if external references are not utilized. Evaluate the power-down modes against the system's duty cycle requirements to optimize battery life. Verify that the source impedance of the analog signals remains low enough to maintain specified total harmonic distortion performance.

Part Context

The AD7888 belongs to the AD7888 series of micropower, high-speed ADCs manufactured by Analog Devices. It is designed to replace larger, higher-power solutions in space-constrained portable electronics. The ARU designation indicates the TSSOP package variant, distinguishing it from the SOIC package versions within the same functional family.

Replacement Considerations

Direct pin-compatible replacements within the same series include the AD7888ARM (SOIC package). For different channel counts or resolutions, consider other members of the Analog Devices ADC portfolio, though functional equivalence requires verifying interface compatibility and power specifications.