MAX9612AUB+

Overview

The MAX9612AUB+ is a high-side current-sense amplifier featuring an integrated 12-bit ADC and a selectable op amp or comparator. It operates with a 0V to 60V common-mode voltage range and supports a 2.7V to 5.5V supply. The device provides programmable gains of 1x, 4x, and 8x for full-scale sense voltages of 440mV, 110mV, and 55mV respectively. It utilizes an I2C interface compatible with 1.8V and 3.3V logic, offering 16 address options via A1/A0 pins. The package is a 10-pin µMAX (3mm x 5mm), rated for -40°C to +125°C.

Feature Summary

• Integrated 12-bit ADC capable of reading sense voltage, common-mode voltage, SET voltage, OUT voltage, and die temperature.
• Internal selectable op amp or comparator with watchdog, latch, and retry functionality for fault monitoring.
• Wide 0V to 60V input common-mode voltage range with low input bias current.
• I2C bus interface compatible with 1.8V and 3.3V logic levels.

Applications

• Hybrid Automotive Power Supplies
• Server Backplanes
• Base-Station PA Control
• Base-Station Feeder Cable Bias-T
• Battery-Operated Equipment

Procurement Notes

Verify the specific suffix 'AUB+' against the manufacturer's official documentation to confirm lead-free/RoHS compliance and pinout configuration. Confirm availability status as distribution channels may list limited stock or end-of-life conditions. Ensure the selected variant matches the required inverting input-to-output configuration specified for the MAX9612 series.

Selection Notes

Select the MAX9612AUB+ when an inverting input-to-output configuration is required, distinguishing it from the noninverting MAX9611. Evaluate the need for the integrated 12-bit ADC and internal op amp/comparator to simplify closed-loop control or fault detection designs. Consider the 0V to 60V common-mode range and I2C compatibility for interfacing with modern microcontrollers in industrial or automotive environments.

Part Context

The MAX9612AUB+ belongs to the MAX9611/MAX9612 family of high-side current-sense amplifiers developed by Analog Devices/Maxim Integrated. This series integrates precision sensing with digital conversion and analog output stages, targeting applications requiring accurate current measurement and system protection in harsh electrical environments.

Replacement Considerations

The MAX9611AUB+ serves as a functional substitute within the same family, differing only in its noninverting input-to-output configuration compared to the MAX9612's inverting topology. Verify that the application circuitry accommodates this polarity difference before substitution.

FAQ

What is the difference between the MAX9611 and MAX9612?

The MAX9611 features a noninverting input-to-output configuration, while the MAX9612 features an inverting input-to-output configuration. Both share identical electrical characteristics and integration features.

Can the MAX9612 measure die temperature?

Yes, the integrated 12-bit ADC can read the internal die temperature over the operating range (-40°C to +125°C) with approximately 0.5°C resolution.