AD4021BCPZ-RL7

Analog To Digital Converters (ADC) Overview

The AD4021BCPZ-RL7 is a 20-bit, 1 MSPS precision successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices. It operates on a single 1.8 V supply with a 1.71 V to 5.5 V logic interface. Key specifications include a maximum integral nonlinearity (INL) of ±3.1 ppm, a signal-to-noise ratio (SNR) of 100.5 dB at 1 kHz input frequency, and a throughput rate of 1 MSPS. The device features Easy Drive capabilities, reducing input kickback and current to 0.5 μA/MSPS, which eliminates the need for dedicated driver amplifiers. It supports SPI/QSPI/MICROWIRE/DSP-compatible serial interfaces and operates within a temperature range of -40°C to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• 20-bit resolution with guaranteed no missing codes and ±3.1 ppm maximum INL
• 1 MSPS throughput rate with first conversion accurate and zero latency
• Easy Drive architecture reduces input current to 0.5 μA/MSPS and extends acquisition phase
• Single 1.8 V analog supply with 1.71 V to 5.5 V digital I/O interface

Analog To Digital Converters (ADC) Applications

• Automated test equipment
• Precision data acquisition systems
• Medical equipment
• Battery-powered equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix RL7 corresponds to the reel packaging configuration as indicated in the ordering guide. Confirm that the BC grade meets the required performance specifications for temperature and accuracy. Ensure compatibility with the host system's voltage levels for both VDD and VIO supplies before integration.

Analog To Digital Converters (ADC) Selection Notes

Select the AD4021BCPZ-RL7 when a 1 MSPS sampling rate is sufficient, distinguishing it from the 1.8 MSPS AD4020 or 500 kSPS AD4022 variants. This component is suitable for applications requiring high accuracy without the power consumption of higher-speed models. Consider the LFCSP-10 package constraints for PCB layout and thermal management during the design phase.

Analog To Digital Converters (ADC) Part Context

This part belongs to the AD4020/AD4021/AD4022 family of 20-bit SAR ADCs. The AD4021 variant specifically targets the 1 MSPS throughput segment, offering a balance between speed and power efficiency. It shares pinout and functional characteristics with the AD4020 and AD4022, allowing for potential design flexibility across different speed requirements within the same product line.

Analog To Digital Converters (ADC) Replacement Considerations

The AD4020BCPZ-RL7 offers 1.8 MSPS throughput, while the AD4022BCPZ-RL7 provides 500 kSPS. These parts are pin-compatible and functionally similar but differ in sampling rates. Verify if the system timing requirements can accommodate the alternative speeds before substituting.