AD7858LBNZ

Overview

The AD7858LBNZ is a low-power, 12-bit successive approximation 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 achieves a throughput rate of 100 kSPS with typical power dissipation of 6.85 mW at 3 V. It includes system and self-calibration capabilities, flexible serial interfaces compatible with SPI/QSPI/8051, and automatic power-down modes. The component is housed in a 24-lead plastic DIP package.

Feature Summary

• Integrated system and self-calibration with autocalibration on power-up
• Flexible serial interface compatible with SPI, QSPI, 8051, and microprocessor systems
• Automatic power-down after conversion for low-power applications
• Eight single-ended or four pseudo-differential input channels

Applications

• Battery-powered personal digital assistants and mobile communications
• Medical instruments and portable diagnostic equipment
• Pen computers and handheld data acquisition systems
• Instrumentation and control systems requiring low power consumption

Procurement Notes

Verify the specific ordering suffix 'BNZ' against official Analog Devices documentation to confirm pin compatibility and performance grade. Confirm current availability status as distribution channels may list end-of-life or limited stock items. Ensure the procurement source provides valid RoHS compliance certificates matching the manufacturer's specifications.

Selection Notes

Select the AD7858LBNZ when low power consumption is prioritized over maximum sampling speed compared to the standard AD7858 variant. Verify that the required 100 kSPS throughput meets application timing constraints. Ensure the design accommodates the 24-lead DIP package dimensions and thermal requirements for the specified operating temperature range.

Part Context

This component belongs to the AD7858 family of high-speed, low-power ADCs from Analog Devices. The 'L' designation indicates the low-power optimized version, while 'B' specifies the linearity error grade. The 'N' suffix denotes the plastic dual-in-line package option. This part serves as a specialized alternative within the series for cost-sensitive, battery-operated designs.

Replacement Considerations

The AD7858LANZ is a verified substitute offering identical functionality in a DIP package. The AD7858LBRZ provides the same electrical characteristics in a surface-mount SOIC package. Verify pinout compatibility and thermal management requirements when transitioning between package types.