AD7853BR

Overview

The AD7853BR is a 12-bit, single-supply sampling ADC from Analog Devices Inc., housed in a 24-lead SOIC package. It operates on a 3 V to 5.5 V supply and supports throughput rates up to 200 kSPS. The device features a pseudo-differential input range of 0 to VREF or bipolar ±VREF/2, with straight binary or two's complement output coding. Power consumption is typically 20 mW at 5 V and 6.85 mW at 3 V. It includes internal self-calibration and system calibration capabilities, flexible serial interfaces (SPI/QSPI/8051), and automatic power-down after conversion.

Feature Summary

• Integrated self-calibration and system calibration mechanisms ensure accuracy over time and temperature variations.
• Flexible serial interface compatible with standard protocols including SPI, QSPI, and 8051 microcontrollers.
• Automatic power-down functionality activates immediately following the completion of each conversion cycle.
• Pseudo-differential analog input architecture minimizes common-mode noise effects.

Applications

• Battery-powered personal digital assistants and mobile communication devices
• Medical instrumentation systems requiring low power consumption
• Pen computers and portable data acquisition units
• Industrial control systems and high-speed modems

Procurement Notes

Verify the specific suffix BR indicates the SOIC package variant when sourcing. Confirm the B grade linearity specifications against project requirements. Ensure the ordering code matches the exact pinout and thermal characteristics defined in the official datasheet for the 24-lead small outline configuration.

Selection Notes

Select this component for applications requiring 12-bit resolution with moderate speed up to 200 kSPS. Consider the AD7853L variant if lower power dissipation is prioritized over maximum throughput. Evaluate the need for external reference voltage versus utilizing the internal reference source based on system precision requirements.

Part Context

This model belongs to the AD7853 family of single-supply, 12-bit sampling ADCs manufactured by Analog Devices Inc. The series includes variants optimized for different performance trade-offs between speed and power consumption. The BR designation specifically identifies the small outline integrated circuit package format within this product line.

Replacement Considerations

The AD7853AR serves as a direct package alternative using the SOIC form factor. For lower power requirements, the AD7853LBR provides equivalent functionality with reduced current draw. Verify pin compatibility and register mapping before substituting any related models in existing designs.