AD7984BCPZ-RL7

Overview

The AD7984BCPZ-RL7 is an 18-bit, 1.33 MSPS PulSAR analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features a true differential analog input range of ±VREF and operates from a single 2.5 V supply with logic interfaces supporting 1.8 V, 2.5 V, 3 V, or 5 V. The device achieves a signal-to-noise ratio (SNR) of 98.5 dB at a full-scale reference voltage of 5 V. Total power dissipation is 10.5 mW at maximum throughput. It utilizes a proprietary serial interface compatible with SPI, QSPI, Microwire, and DSP standards, allowing for daisy-chaining multiple ADCs. The component is housed in a 10-lead LFCSP package and supports operation across a temperature range of −40°C to +85°C.

Feature Summary

• Successive approximation architecture providing zero latency conversion without pipeline delay.
• Versatile serial interface supporting CS mode and chain mode with optional busy indicator.
• Low power consumption optimized for battery-operated applications.
• High dynamic performance with integrated track-and-hold circuitry.

Applications

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

Procurement Notes

Verify the specific ordering suffix RL7 corresponds to the reel packaging configuration required for your assembly line. Confirm that the BC sub-model meets the specified accuracy and linearity requirements for your design. Ensure the LFCSP package dimensions align with your PCB footprint constraints. Cross-reference the datasheet revision C specifications against your system's timing and voltage requirements.

Selection Notes

Select this component when high resolution and moderate speed are required in a compact form factor. The external reference requirement allows flexibility in setting the input voltage range independent of the supply voltage. Consider the separate VIO pin if interfacing with digital logic levels different from the analog supply. Evaluate the thermal resistance characteristics if operating near the upper temperature limits.

Part Context

The AD7984 belongs to the PulSAR family of precision SAR ADCs from Analog Devices. It is pin-for-pin compatible with the AD7982. The part is designed for applications requiring high accuracy and low power consumption. It complements other data converters in the portfolio by offering a balance between resolution and throughput in small packages.

Replacement Considerations

The AD7982 is a pin-compatible alternative within the same family. Verify compatibility regarding specific accuracy grades and package availability. Check for any differences in timing specifications or power consumption profiles between the two parts before substitution.