AD7854BRZ

Overview

The AD7854BRZ is a high-speed, low-power 12-bit Analog-to-Digital Converter (ADC) from Analog Devices Inc., operating on a single 3 V to 5.5 V supply. It features a throughput rate of 200 kSPS with a track-and-hold acquisition time of 500 ns. The device utilizes a pseudo-differential sampling scheme and offers flexible parallel I/O interfaces. Power consumption is typically 15 mW in normal operation at 3 V, dropping to 25 µW in automatic power-down mode. It includes self-calibration and system calibration options to maintain accuracy over temperature variations.

Feature Summary

• Integrated self-calibration and system calibration mechanisms ensure long-term accuracy across varying temperatures.
• Flexible power management architecture supports multiple power-down states for optimized energy efficiency.
• Versatile parallel interface allows compatibility with both 8-bit and 16-bit data buses via byte-mode control.

Applications

• Battery-powered systems including personal digital assistants and mobile communications
• Medical instruments requiring precise signal acquisition
• Instrumentation and control systems
• High-speed modems

Procurement Notes

Verify the specific suffix 'BRZ' corresponds to the SOIC-28 package and commercial temperature range (-40°C to +85°C). Confirm RoHS compliance status as indicated by the 'Z' suffix. Ensure the ordering part number matches the exact linearity specifications required for your application, as variants exist with different integral nonlinearity tolerances.

Selection Notes

Select the AD7854BRZ when a 200 kSPS sampling rate is required alongside low power dissipation. Choose this model over the AD7854L variant if higher speed is prioritized over minimal power consumption. Ensure the design accommodates the 28-lead SOIC package dimensions and thermal requirements for the specified operating temperature range.

Part Context

The AD7854 series comprises CMOS-based 12-bit ADCs optimized for speed and power efficiency. The AD7854BRZ specifically denotes the standard speed version housed in a 28-lead Small Outline Integrated Circuit (SOIC) package. It belongs to a family that includes the lower-power AD7854L variant and other package options like DIP and SSOP.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.