MAX1085BESA

Analog To Digital Converters (ADC) Overview

The MAX1085BESA+ is a 10-bit successive-approximation analog-to-digital converter (ADC) from Analog Devices Inc./Maxim Integrated. It operates on a single +2.7V to +3.6V supply and features an internal +2.5V reference, high-bandwidth track/hold, and a 3-wire serial interface compatible with SPI/QSPI/MICROWIRE devices. The device achieves a sampling rate of 300ksps with low power consumption of 2.5mA at full speed. It is housed in an 8-pin SO package and supports an operating temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Single-supply operation optimized for low-voltage applications
• Integrated internal voltage reference eliminates external components
• High-speed successive-approximation architecture with track/hold
• Direct compatibility with standard microprocessor serial interfaces

Analog To Digital Converters (ADC) Applications

• Portable data logging systems
• Battery-powered instrumentation
• Medical instruments
• Pen digitizers
• Process control units

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'BESA' corresponds to the required temperature grade (-40°C to +85°C) and accuracy class (±1 LSB INL). Confirm package type matches the 8-pin SO specification. Check RoHS compliance status as indicated by the '+' suffix. Ensure ordering documentation aligns with current manufacturer specifications.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 10-bit resolution and 300ksps throughput are sufficient for the application. Choose over the MAX1084 if the system operates exclusively within the 2.7V to 3.6V supply range. Consider the internal reference capability to reduce board space. Verify that the source impedance allows for the specified acquisition time without additional buffering.

Analog To Digital Converters (ADC) Part Context

This device belongs to the MAX1084/MAX1085 family of serial ADCs. It serves as a lower-voltage, single-channel variant within the series. The MAX1085BESA+ is functionally similar to the MAX1243 but offers higher conversion speeds. It is designed as a pin-compatible upgrade for legacy designs requiring improved performance.

Analog To Digital Converters (ADC) Replacement Considerations

MAX1085AESA+ offers identical functionality with ±0.5 LSB INL accuracy and the same -40°C to +85°C temperature range. MAX1085ACSA+ provides ±0.5 LSB INL but is limited to the 0°C to +70°C commercial temperature range. Both are direct pin-compatible replacements depending on accuracy and thermal requirements.