AD7982BRMZ

Overview

The AD7982BRMZ is an 18-bit, successive approximation analog-to-digital converter (ADC) from Analog Devices Inc. It operates on a single 2.5 V supply and achieves a throughput of 1 MSPS with a total power dissipation of 7 mW at full speed. The device features true differential analog inputs with a range of ±VREF, where VREF can be set between 2.4 V and 5.1 V. It utilizes a versatile serial interface compatible with SPI, QSPI, Microwire, and DSP standards, supporting daisy-chaining. The component is housed in a 10-lead MSOP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Zero latency architecture providing immediate data availability after conversion completion without pipeline delay.
• True differential analog input stage capable of accepting signals swinging between 0 V and VREF or ±VREF.
• Versatile serial interface allowing compatibility with multiple digital protocols and support for daisy-chaining multiple devices.
• Low power consumption that scales linearly with throughput, enabling efficient operation in battery-powered systems.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct packaging and tape-and-reel specifications. Confirm that the required voltage reference and driver amplifier components are sourced separately, as they are not integrated into the ADC package. Ensure the host system logic levels match the VIO supply requirements for proper interface operation.

Selection Notes

Select this component when high resolution and moderate speed are required alongside low power constraints. The 18-bit resolution supports precision applications, while the 1 MSPS rate suits many industrial tasks. Consider the external reference requirement and the need for a differential driver if single-ended signals must be converted. Verify that the MSOP package fits the available board space compared to the LFCSP option.

Part Context

The AD7982 belongs to the PulSAR family of SAR ADCs from Analog Devices. It shares pin compatibility with the 16-bit AD7980 but offers higher resolution. The BRMZ suffix indicates the commercial temperature grade (-40°C to +85°C) and the MSOP-10 package type. This part is designed for applications requiring precise data conversion with minimal power usage.

Replacement Considerations

The AD7980 is pin-for-pin compatible but provides 16-bit resolution instead of 18 bits. Other members of the PulSAR family may offer different sampling rates or resolutions but require verification of electrical characteristics and pin assignments before substitution.