MAX1281BEUP+

Analog To Digital Converters (ADC) Overview

The MAX1281BEUP+ is a 12-bit successive-approximation analog-to-digital converter (ADC) from Analog Devices/Maxim Integrated, housed in a 20-pin TSSOP package. It operates on a single +2.7V to +3.6V supply and supports sampling rates up to 300ksps. The device integrates an 8-channel analog-input multiplexer, a high-bandwidth track/hold circuit, and a serial interface compatible with SPI/QSPI/MICROWIRE standards. Key electrical specifications include a typical signal-to-noise plus distortion ratio of 70dB, ±1 LSB differential nonlinearity, and ±1 LSB integral nonlinearity. It features an internal +2.5V reference and four software-selectable power modes.

Analog To Digital Converters (ADC) Feature Summary

• Integrates an 8-channel analog-input multiplexer and high-bandwidth track/hold circuitry for efficient multi-channel data acquisition.
• Features a flexible 4-wire serial interface that connects directly to standard microprocessor protocols without external logic.
• Includes an internal +2.5V reference with a buffer amplifier offering a voltage-adjustment range of ±1.5%.
• Provides multiple power management options including normal operation, reduced power, fast power-down, and full power-down modes.

Analog To Digital Converters (ADC) Applications

• Portable Data Logging
• Data Acquisition Systems
• Medical Instruments
• Battery-Powered Instruments
• Process Control

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix BEUP indicates the extended temperature range of -40°C to +85°C compared to the BCUP variant. Confirm RoHS compliance and lead-free status as indicated by the '+' designation. Ensure the ordering information matches the exact pin count and package dimensions required for the target PCB layout.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single-supply 12-bit ADC with moderate speed and low power consumption is required. The MAX1281BEUP+ is suitable for applications needing an integrated multiplexer and serial interface. Consider the -40°C to +85°C operating range if industrial or automotive environments are involved. Verify that the 300ksps sampling rate meets the system bandwidth requirements.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MAX1280/MAX1281 family of 12-bit serial ADCs. The MAX1281 variant is distinguished by its lower voltage operation (+2.7V to +3.6V) compared to the MAX1280 (+4.5V to +5.5V). The BEUP suffix denotes the extended temperature grade (-40°C to +85°C) and the 20-pin TSSOP package format.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1281BCUP+ serves as a direct functional substitute with an identical specification set but a limited commercial temperature range of 0°C to +70°C. Ensure the thermal environment of the application falls within the narrower range of the BCUP variant before swapping.