AD7988-1BRMZ

Overview

The AD7988-1BRMZ is a 16-bit successive approximation analog-to-digital converter (ADC) from Analog Devices, operating at a throughput of 100 kSPS. It features a pseudo-differential input range of 0 V to VREF with an external reference voltage between 2.4 V and 5.1 V. The device operates on a single 2.5 V supply (VDD) and supports logic interfaces from 1.8 V to 5 V via the VIO pin. Key performance metrics include a typical SNR of 91.5 dB, THD of -114 dB, and INL of ±1.25 LSB maximum. Power dissipation is 700 µW at full throughput. It is housed in a 10-lead MSOP package and functions within a temperature range of −40°C to +125°C.

Feature Summary

• Zero latency architecture with no pipeline delay for immediate data availability after conversion completion.
• Versatile serial interface compatible with SPI, Microwire, and DSP standards, supporting daisy-chaining capabilities.
• Low power consumption with independent digital interface supply allowing operation across multiple logic voltage levels.

Applications

• Automated test equipment
• Data acquisition systems
• Medical instruments
• Machine automation

Procurement Notes

Verify the specific ordering suffix BRMZ corresponds to the 10-lead MSOP package variant when sourcing components. Confirm that the required throughput matches the AD7988-1 specification of 100 kSPS rather than the faster AD7988-5 option. Ensure the design accommodates the pseudo-differential input configuration and external reference requirements specified in the datasheet.

Selection Notes

Select this component for applications requiring high resolution with minimal power draw in battery-operated devices. Consider the 100 kSPS sampling rate as sufficient for most low-frequency signal monitoring tasks. Evaluate the need for daisy-chaining multiple units, which utilizes the SDI input to connect several ADCs on a single bus line efficiently.

Part Context

This part belongs to the AD7988-x family of 16-bit PulSAR ADCs manufactured by Analog Devices. The family includes variants such as the AD7988-5, which offers higher throughput at 500 kSPS. Both share similar architectural features but differ in speed and power characteristics. The AD7988-1 specifically targets lower bandwidth applications where energy efficiency is prioritized over raw sampling speed.

Replacement Considerations

The AD7988-5 serves as a higher-speed alternative within the same family. Designers should verify if the increased 500 kSPS throughput justifies the higher power consumption compared to the AD7988-1's 100 kSPS capability.