AD7989-1BRMZ-RL7

Overview

The AD7989-1BRMZ-RL7 is an 18-bit, 100 kSPS PulSAR analog-to-digital converter (ADC) from Analog Devices. It features a true differential analog input voltage range of ±VREF with VREF between 2.4 V and 5.1 V. The device operates on a single 2.5 V supply with a 1.8 V to 5 V logic interface. Power dissipation is 700 µW at 100 kSPS total. Key performance metrics include a typical SNR of 98 dB, THD of −119 dB, and INL of ±2 LSB maximum. It utilizes a zero-latency architecture and is housed in a 10-lead MSOP package.

Feature Summary

• Zero latency successive approximation architecture for immediate data availability
• True differential analog input range compatible with external reference voltages
• Versatile serial interface supporting SPI, QSPI, Microwire, and DSP modes
• Low power consumption suitable for battery-operated applications

Applications

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

Procurement Notes

Verify the specific suffix RL7 indicates reel packaging when sourcing. Confirm the BRMZ variant corresponds to the commercial temperature range and MSOP package. Ensure compatibility with host logic levels ranging from 1.8 V to 5 V via the VIO pin. Check for RoHS compliance status as per current manufacturer specifications.

Selection Notes

Select this component for applications requiring high resolution and low power at moderate speeds. The AD7989-1 offers 100 kSPS throughput, whereas the AD7989-5 provides 500 kSPS. Consider the external reference requirement and the need for differential inputs. Evaluate PCB layout constraints for the MSOP package compared to LFCSP options.

Part Context

This part belongs to the AD7989-1/AD7989-5 family of 18-bit PulSAR ADCs. It shares architectural similarities with other ADI SAR converters but is distinct in its specific throughput and power profile. The BRMZ suffix denotes the commercial grade and MSOP-10 package, differentiating it from industrial or LFCSP variants within the same series.

Replacement Considerations

The AD7989-5 serves as a higher-speed alternative within the same package and pinout. Other 18-bit SAR ADCs may require level shifting or interface modifications. Verify pin compatibility and thermal characteristics before substituting with non-family parts.