AD7858BR-REEL

Overview

The AD7858BR-REEL is a high-speed, low-power 12-bit analog-to-digital converter manufactured by Analog Devices Inc. It features an 8-channel multiplexer supporting single-ended or pseudo-differential inputs and operates on a single 3 V to 5.5 V supply. The device delivers a throughput rate of 200 kSPS with a typical power dissipation of 20 mW at 3 V. It utilizes a successive approximation architecture and includes system and self-calibration capabilities. Data is transferred via a flexible serial interface compatible with SPI and QSPI standards.

Feature Summary

• Integrated 8-channel input multiplexer supporting single-ended and pseudo-differential configurations
• Automatic system and self-calibration functions to maintain accuracy over temperature and time
• Flexible serial communication interface compatible with standard microprocessor protocols
• Multiple power-down modes including automatic shutdown after conversion for energy efficiency

Applications

• Battery-powered portable systems such as personal digital assistants and mobile communications devices
• Medical instrumentation requiring precise signal acquisition
• Industrial control and data acquisition systems
• Pen computers and handheld measurement instruments

Procurement Notes

Verify the specific suffix REEL indicates tape-and-reel packaging when sourcing components. Confirm that the B grade designation corresponds to the specified ±1/2 LSB integral nonlinearity error. Ensure the operating voltage range matches the 3 V to 5.5 V specification provided in the datasheet. Cross-reference the manufacturing date code to ensure compliance with current environmental regulations.

Selection Notes

Select this component for applications requiring moderate speed and multi-channel input within a compact package. The B grade offers improved linearity compared to the A grade version. Consider the AD7858L variant if lower power consumption is prioritized over maximum sampling speed. Ensure the external reference voltage requirements align with the internal reference options available on the device.

Part Context

This part belongs to the AD7858 family of 12-bit sampling ADCs from Analog Devices. The family includes variants optimized for different performance trade-offs, such as the AD7858L for low power. The BR suffix denotes the SOIC package and B grade specifications. This series is designed for general-purpose data acquisition tasks requiring reliable performance across industrial temperature ranges.

Replacement Considerations

The AD7858AR is a pin-compatible alternative within the same family offering similar functionality but potentially different grading or packaging options. Verify that any substitute maintains the 200 kSPS throughput and 12-bit resolution required for the application.