Overview

Features and Benefits

  • 0V to +60V Input Common-Mode Voltage Range
  • 2.7V to 5.5V Power-Supply Range, Compatible with 1.8V and 3.3V Logic
  • 5µA Software Shutdown Current
  • Integrated 12-Bit ADC
  • 13µV Current-Sense ADC Resolution
  • 500µV (max) Current-Sense ADC Input Offset Voltage
  • 0.5% (max) Current-Sense ADC Gain Error
  • I²C Bus with 16 Addresses
  • Small, 3mm x 5mm 10-Pin µMAX Package
  • -40°C to +125°C Operating Temperature Range

Product Details

The MAX9611/MAX9612 are high-side current-sense amplifiers with an integrated 12-bit ADC and a gain block that can be configured either as an op amp or comparator, making these devices ideal for a number of industrial and automotive applications.

The high-side, current-sense amplifiers operate over a wide 0V to 60V input common-mode voltage range. The programmable full-scale voltage (440mV, 110mV, and 55mV) of these amplifiers offers wide dynamic range, accurate current measurement, and application flexibility in choosing sense resistor values. A choice of either an internal op amp or a comparator is provided to the user. The internal amplifier can be used to limit the inrush current or to create a current source in a closed-loop system. The comparator can be used to monitor fault events for fast response.

An I2C-controlled 12-bit, 500sps analog-to-digital converter (ADC) can be used to read the voltage across the sense resistor (VSENSE), the input common-mode voltage (VRSCM), op-amp/comparator output (VOUT), op-amp/comparator reference voltage (VSET), and internal die temperature. The I2C bus is compatible with 1.8V and 3.3V logic, allowing modern microcontrollers to interface to it.

The MAX9611 features a noninverting input-to-output configuration while the MAX9612 features an inverting input-to-output configuration.

The MAX9611/MAX9612 operate with a 2.7V to 5.5V supply voltage range, are fully specified over the -40°C to +125°C automotive temperature range, and are available in a 3mm x 5mm, 10-pin µMAX® package.

Applications

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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (3)

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.