AD4022BCPZ-RL7

Analog To Digital Converters (ADC) Overview

The AD4022BCPZ-RL7 is a 20-bit, 500 kSPS, differential successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices. It features Easy Drive technology, which reduces input kickback and current to 0.5 μA/MSPS, eliminating the need for dedicated driver amplifiers. The device operates on a single 1.8 V analog supply with a 1.71 V to 5.5 V digital interface. Key performance metrics include a signal-to-noise ratio (SNR) of 100.5 dB at 1 kHz input frequency with a 5 V reference, integral nonlinearity (INL) of ±3.1 ppm maximum, and guaranteed 20-bit resolution without missing codes. Power consumption scales linearly with throughput, reaching 2.7 mW at 500 kSPS.

Analog To Digital Converters (ADC) Feature Summary

• Easy Drive architecture with reduced input current (0.5 μA/MSPS) and enhanced acquisition phase (≥77% of cycle time at 500 kSPS).
• Input span compression allows single-supply operation while preserving full ADC code range.
• Input overvoltage clamp protection sinks up to 50 mA, minimizing disturbances on the reference pin.
• SPI/QSPI/MICROWIRE/DSP-compatible serial interface with fast conversion allowing low SPI clock rates.

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'RL7' indicates reel packaging when sourcing. Confirm that the 'B' grade meets the required temperature range specifications (-40°C to +125°C). Ensure the ordering part number matches the exact throughput requirement of 500 kSPS for the AD4022 variant within the family.

Analog To Digital Converters (ADC) Selection Notes

Select the AD4022BCPZ-RL7 when a 500 kSPS throughput rate is sufficient for the application, offering lower power consumption compared to the 1.8 MSPS AD4020. The LFCSP-10 package is suitable for space-constrained designs. Consider the Easy Drive features if driving impedance is high or if reducing the bill of materials by omitting external buffer amplifiers is desired.

Analog To Digital Converters (ADC) Part Context

The AD4022BCPZ-RL7 belongs to the AD4020/AD4021/AD4022 family of 20-bit SAR ADCs. These devices share pin compatibility with the AD4003/AD4007/AD4011 family. The AD4022 specifically provides the 500 kSPS sampling rate option, distinguishing it from the higher-speed AD4020 (1.8 MSPS) and AD4021 (1 MSPS) variants within the same datasheet.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible replacements within the same datasheet include the AD4020BCPZ-RL7 (1.8 MSPS) and AD4021BCPZ-RL7 (1 MSPS), provided the system timing accommodates the different throughput rates. Other family members like the AD4003 may require interface adjustments.