MAX1284BESA+

Analog To Digital Converters (ADC) Overview

The MAX1284BESA+ is a 12-bit successive-approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +4.5V to +5.5V supply and features an internal +2.5V reference voltage. The device supports a sampling rate of 400ksps with a serial interface compatible with SPI, QSPI, and MICROWIRE protocols. It utilizes an 8-pin SO package and functions within a temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a high-bandwidth track/hold circuit and a 12-bit SAR architecture for efficient signal conversion.
• Includes an on-chip +2.5V voltage reference requiring only a bypass capacitor for operation.
• Features a 3-wire serial interface that connects directly to microprocessors without external logic.
• Offers low power consumption with a dedicated shutdown mode to minimize current draw.

Analog To Digital Converters (ADC) Applications

• Portable data logging systems
• Battery-powered instruments
• Medical instrumentation
• Process control applications

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix BESA+ corresponds to the industrial temperature range (-40°C to +85°C) and 8-pin SO package. Confirm RoHS compliance status as indicated by the plus sign in the part number. Ensure the supply voltage requirements match the MAX1284 specifications (+4.5V to +5.5V) rather than the MAX1285 variants.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and 400ksps sampling rate are required within a single-supply environment. It serves as a pin-compatible upgrade to the MAX1240/MAX1241 series. Consider the internal reference limitations if higher precision or different reference voltages are needed. Evaluate the serial interface compatibility with the host microcontroller's available ports.

Analog To Digital Converters (ADC) Part Context

This device belongs to the MAX1284/MAX1285 family of single-supply, low-power, serial 12-bit ADCs. It is functionally similar to the MAX1240 but offers higher speed capabilities. The MAX1284 variant specifically targets +5V systems, distinguishing it from the MAX1285 which operates at lower voltages.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1284BCSA+ is a commercial grade alternative with a 0°C to +70°C temperature range. The MAX1240BESA/V+T is a slower, lower-voltage alternative. Verify pin compatibility and electrical characteristics before substituting.