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MAX9612：High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator

Current-Sense Amplifiers with Digital Output and 60V Common-Mode Range

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.

Key Features 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

MAX9611, MAX9612: Typical Application Circuit Applications/Uses Base-Station Feeder Cable Bias-T Base-Station PA Control Battery-Operated Equipment Hybrid Automotive Power Supplies Server Backplanes Telecom Cards

DataSheet

Parametrics

Design kits & evaluation modules

• MAX9611EVKIT
• MAX9611PMB1
• MAXPMBAE

Ordering Information