AD7631BSTZRL

Analog To Digital Converters (ADC) Overview

The AD7631BSTZRL is an 18-bit, 250 kSPS differential PulSAR ADC. It features programmable input ranges of ±10 V, ±5 V, 0–10 V, and 0–5 V. The device offers a dynamic range of 102.5 dB and an SNR of 101 dB at 2 kHz. Power dissipation is 94 mW with the internal reference enabled at full throughput.

Analog To Digital Converters (ADC) Feature Summary

• 18-bit resolution with no missing codes
• Four programmable analog input ranges
• Integrated 5 V internal voltage reference
• Flexible parallel and serial digital interfaces

Analog To Digital Converters (ADC) Applications

• Process controls
• High speed data acquisition
• Digital signal processing
• Spectrum analysis
• Automated test equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify that the ordering suffix RL indicates tape-and-reel packaging. Confirm the specific package variant matches the design requirements, as the component is available in both LQFP and LFCSP form factors. Ensure the supply voltages align with the specified operational limits for AVDD, DVDD, and OVDD.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high-resolution differential sampling. The architecture supports multiple interface modes including SPI-compatible serial and parallel buses. Consider the power supply requirements, specifically the need for dual high-voltage rails (VCC/VEE) to support the full input range capabilities.

Analog To Digital Converters (ADC) Part Context

This part belongs to the Analog Devices PulSAR family of charge redistribution SAR ADCs. It utilizes iCMOS process technology to achieve high performance. The series includes variants with different resolutions and channel counts, but this specific model focuses on single-channel, high-precision differential conversion.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitutes include other 18-bit differential SAR ADCs from the same manufacturer family, such as the AD7678 or AD7679, which share similar architectural characteristics and interface options.

Analog To Digital Converters (ADC) FAQ

How are the analog input ranges selected?

Input ranges are selected via hardware pins (TEN and BIPOLAR) or through the serial configuration port when operating in software mode.

What is the maximum throughput rate?

The maximum throughput rate is 250 kSPS, achieved with a complete cycle time of 4.0 μs.

Does the device have pipeline delay?

No, the successive approximation register (SAR) architecture ensures there is no pipeline delay; conversion results are available immediately after completion.