High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator MAX9611/MAX9612 - Maxim Integrated Products - #1

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________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator MAX9611/MAX9612 General Description 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 -40NC to +125NC automotive temperature range, and are available in a 3mm x 5mm, 10-pin FMAXM package. Applications Hybrid Automotive Power Supplies Server Backplanes Base-Station PA Control Base-Station Feeder Cable Bias-T Telecom Cards Battery-Operated Equipment Features S 0V to +60V Input Common-Mode Voltage Range S 2.7V to 5.5V Power-Supply Range, Compatible with 1.8V and 3.3V Logic S 5ìA Software Shutdown Current S Integrated 12-Bit ADC S 13ìV Current-Sense ADC Resolution S 500ìV (max) Current-Sense ADC Input Offset Voltage S 0.5% (max) Current-Sense ADC Gain Error S I2C Bus with 16 Addresses S Small, 3mm x 5mm 10-Pin ìMAX Package S -40NC to +125NC Operating Temperature Range 19-5543; Rev 2; 1/11 Note: All devices operate over the -40NC to +125NC temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. Functional Diagrams appear at end of data sheet. Ordering Information/ Selector Guide FMAX is a registered trademark of Maxim Integrated Products, Inc. Typical Application Circuit EVALUATION KIT AVAILABLE PART OUTPUT PIN-PACKAGE MAX9611AUB+ Noninverting 10 FMAX MAX9612AUB+ Inverting 10 FMAX MAX9611 MAX9612 VCC ìC 1.8V LOGIC SCL SDA RS+ RSA0 A1 SCL SDA OUT SET GND 0.1ìF VIN 0V TO 60V LOAD RSENSE