AD7951BSTZRL

Overview

The AD7951BSTZRL is a 14-bit, 1 MSPS PulSAR ADC fabricated on iCMOS technology. It features multiple programmable input ranges (5 V, 10 V, ±5 V, ±10 V) selectable via pins or serial SPI. Throughput reaches 1 MSPS in warp mode, 800 kSPS in normal mode, and 670 kSPS in impulse mode. The device offers no missing codes, ±0.3 LSB typical INL, and 85 dB SNR at 2 kHz. It includes a 5 V internal reference with 3 ppm/°C drift and a temperature output. Power dissipation is 235 mW at 1 MSPS and 10 mW at 100 kSPS. Available in 48-lead LQFP and LFCSP packages.

Feature Summary

• Configurable analog input ranges and sampling modes via hardware pins or software commands
• Integrated high-speed SAR architecture with no pipeline delay
• On-chip 5 V reference with low temperature drift and dedicated temperature sensor output
• Flexible digital interface supporting parallel bus and various serial protocols

Applications

• Process control systems
• Medical instruments
• High speed data acquisition
• Digital signal processing
• Automated test equipment

Procurement Notes

Verify the specific ordering suffix to confirm package type and reel specifications. Ensure compatibility with system voltage levels for AVDD, DVDD, and OVDD supplies. Confirm thermal requirements for the selected package option under maximum throughput conditions. Check for extended temperature range availability if operating outside the standard industrial range.

Selection Notes

Select based on required input range polarity and amplitude. Choose between warp, normal, or impulse modes depending on power consumption versus throughput needs. Verify interface compatibility with the host processor for either parallel or serial data readout. Consider the internal reference stability or plan for an external reference if tighter accuracy is required.

Part Context

The AD7951 belongs to Analog Devices' PulSAR family of charge redistribution successive approximation register converters. It shares architectural similarities with other 14-bit high-speed ADCs in the series but is distinguished by its true bipolar input capability and specific pin-compatible configuration options for flexible system integration.

Replacement Considerations

The AD7952 is a documented substitute within the same family offering similar performance characteristics. Verify pin compatibility and register mapping when transitioning between these models to ensure seamless integration without hardware redesign.