AD7938BCPZ-6

Overview

The AD7938BCPZ-6 is a 12-bit, high-speed successive approximation register (SAR) analog-to-digital converter featuring eight multiplexed analog input channels and an integrated channel sequencer. It operates from a single 2.7 V to 5.25 V supply with a maximum throughput rate of 625 kSPS. The device includes a low-noise differential track-and-hold amplifier capable of handling input frequencies up to 50 MHz. Key specifications include a signal-to-noise ratio of 71 dB in differential mode, integral nonlinearity of ±1 LSB, and power consumption as low as 3.6 mW at 625 kSPS with a 3 V supply. It utilizes a high-speed parallel interface with word or byte modes and supports software-configurable single-ended, fully differential, or pseudo-differential inputs.

Feature Summary

• Integrated channel sequencer for automated multi-channel conversion sequences
• Software-selectable analog input configurations including single-ended, fully differential, and pseudo-differential modes
• On-chip precision 2.5 V reference voltage source with external overdrive capability
• VDRIVE function enabling direct interfacing with 3 V or 5 V processor systems independent of the main supply

Applications

• Portable and battery-powered data acquisition systems requiring low power consumption
• Industrial process control and monitoring applications utilizing multiple sensor inputs
• Medical instrumentation and diagnostic equipment requiring precise signal digitization
• Chemical analysis instruments and quantitative testing devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Ensure that any requested variants match the exact electrical specifications and pinout requirements defined in the official datasheet. Cross-reference part numbers with authorized distributors to confirm availability and authenticity before finalizing procurement plans.

Selection Notes

Select this component when a design requires eight analog inputs with hardware sequencing capabilities and a parallel interface. It is suitable for applications needing high throughput rates up to 625 kSPS while maintaining low power dissipation. Consider the internal reference accuracy and input flexibility if external references are undesirable or if differential signaling is required for noise immunity.

Part Context

This device belongs to the AD7938-6 family of 12-bit SAR ADCs designed for high-speed, low-power applications. It shares architectural similarities with other members of the series but is distinguished by its specific throughput rate and channel count. The component is manufactured by Analog Devices Inc. and is available in 32-lead LFCSP and TQFP packages.

Replacement Considerations

The AD7938BSUZ-6 is documented as a parameter-equivalent alternative within the same product family.