AD7951BCPZ

Overview

The AD7951BCPZ is a 14-bit, 1 MSPS PulSAR® analog-to-digital converter (ADC) fabricated on Analog Devices' iCMOS process. It features a successive approximation register architecture with no pipeline delay. The device supports multiple pins or software-programmable input ranges of 0 V to 5 V, 0 V to 10 V, ±5 V, and ±10 V. Throughput reaches 1 MSPS in warp mode, 800 kSPS in normal mode, and 670 kSPS in impulse mode. It includes an internal 5 V reference with ±3 ppm/°C drift and a temperature output pin. Power dissipation is 235 mW at 1 MSPS with the internal reference enabled, dropping to 10 µW in power-down mode. The component is available in 48-lead LQFP and LFCSP packages.

Feature Summary

• Configurable input ranges selectable via hardware pins or serial interface for unipolar and bipolar applications
• Integrated high-speed sampling ADC with charge redistribution SAR architecture and internal conversion clock
• Flexible digital interface supporting parallel bus and SPI/QSPI/MICROWIRE/DSP-compatible serial modes
• Built-in internal voltage reference with buffer capability and dedicated temperature sensor output

Applications

• Process control systems
• Medical instruments
• High speed data acquisition
• Digital signal processing
• Instrumentation and spectrum analysis

Procurement Notes

Verify the specific suffix BCPZ corresponds to the 48-lead LFCSP package variant when sourcing. Confirm that the ordering code matches the required thermal performance specifications for the target application environment. Ensure compatibility with the host system's voltage levels for the OVDD supply domain before integration.

Selection Notes

Select this component for applications requiring true bipolar input ranges without external scaling circuitry. Consider the warp mode for maximum throughput requirements where continuous conversion is necessary. Evaluate the impulse mode if power consumption must be scaled relative to the sampling rate. Verify that the 14-bit resolution meets the system accuracy requirements regarding integral nonlinearity and signal-to-noise ratio.

Part Context

The AD7951 belongs to the PulSAR family of high-performance analog-to-digital converters from Analog Devices. This series utilizes iCMOS technology to combine high voltage processes with low power consumption. The AD7951 specifically targets applications needing flexible input range configuration and fast conversion speeds within a compact surface-mount footprint.

Replacement Considerations

The AD7952 is a compatible alternative offering differential input configurations while maintaining similar performance characteristics.