AD7939BCP-REEL7

Overview

The AD7939BCP-REEL7 is a high-speed, low-power 10-bit successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It features eight multiplexed analog input channels with an integrated channel sequencer and operates from a single 2.7 V to 5.25 V power supply. The device achieves a maximum throughput rate of 1.5 MSPS with a differential track-and-hold amplifier capable of handling input frequencies up to 50 MHz. It includes an accurate on-chip 2.5 V reference and supports software-configurable single-ended, fully differential, or pseudo-differential inputs. The component utilizes a high-speed parallel interface with word/byte modes and is housed in a 32-lead LFCSP package.

Feature Summary

• Integrated channel sequencer for preprogrammed sequential conversion of multiple analog inputs
• Software-selectable analog input configurations including single-ended, fully differential, and pseudo-differential modes
• On-chip control register enabling flexible setup of operating conditions, output coding, and power management
• VDRIVE function allowing the parallel interface to connect directly to 3 V or 5 V processor systems independent of VDD

Applications

• Industrial process control data acquisition systems
• Battery-powered instrumentation requiring low power consumption
• Multichannel signal monitoring applications
• Portable test and measurement equipment

Procurement Notes

Verify that the ordering suffix matches the required package type and reel configuration. Confirm the specific temperature grade aligns with operational requirements. Ensure compatibility with existing PCB footprints for the 32-lead LFCSP package. Check for moisture sensitivity level compliance during storage and assembly processes.

Selection Notes

Select this component when eight analog channels are required within a single IC. Choose the AD7939 over the AD7938 if 10-bit resolution is sufficient for the application, as it offers lower power consumption. Consider the internal sequencer functionality to reduce microprocessor overhead in multichannel scanning applications.

Part Context

This part belongs to the AD7938/AD7939 family of 12-bit and 10-bit parallel ADCs. It shares architectural similarities with other members like the AD7934 and AD7933 but provides eight channels instead of four. The BCP suffix indicates the LFCSP package variant, distinguishing it from TQFP versions.

Replacement Considerations

The AD7939BSUZ serves as a pin-compatible alternative in a TQFP package. For applications requiring 12-bit resolution, the AD7938 series is the direct functional equivalent.