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

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Overview

Features and Benefits
Product Details

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 (V_SENSE), the input common-mode voltage (V_RSCM), op-amp/comparator output (V_OUT), op-amp/comparator reference voltage (V_SET), 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 Categories

Amplifiers
- Current Sense Amplifiers

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Product Lifecycle 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)

MAXPMBAE

Maxim Analog Essentials Collection of Peripheral Modules

MAX9611PMB1

MAX9611PMB1 Peripheral Module

MAX9611EVKIT

Evaluation Kit for the MAX9611 and MAX9612

MAXPMBAE

View Detailed Evaluation Kit Information

Maxim Analog Essentials is a collection of peripheral modules which can plug directly into any FPGA/CPU expansion port which follows the Pmod™ standard established by Digilent, Inc. The collection includes modules containing a wide variety of commonly used analog and mixed signal functions. The modules are supported by software which includes FPGA configuration files for three popular FPGA platforms: Avnet LX-9, Digilent Nexys 3 and Avnet ZEDBoard, as well as example programs to exercise and demonstrate each module. While the example programs demonstrate the module’s functionality, they are well partitioned and documented allowing the core routines to be easily cut and pasted into your own programs. The combination of plug-in simplicity and easy software integration allows for quick migration from idea to working prototype.

Features & Benefits

Data Converter, Interface, Clock, Sensor, and Other Modules Included to Address Many Design Needs
Plug in Modules Enable Rapid Hardware Prototyping
Proven Software Drivers Reduce Development Time
FPGA Configuration Files Included to Simplify Design Effort

Resources

MAX9611PMB1

View Detailed Evaluation Kit Information

The MAX9611PMB1 peripheral module provides the necessary hardware to interface the MAX9611 current-sense amplifier with 12-bit ADC and op amp, along with the MAX5380 8-bit DAC, to any system that utilizes Pmod™-compatible expansion ports configurable for I²C communication. The IC is configured with an external p-channel FET and a current-sense resistor to form a current-limiting circuit capable of handling currents up to 1A. An 8-bit DAC (U1) is used to set the current-limit point programmatically by the host through the I²C bus. In addition to providing a programmable current-limit function, the ADC within the IC measures the load current/voltage and the set-point voltage that can be read by the host through the I²C bus.

Refer to the MAX9611 IC data sheet for detailed information regarding operation of the IC.

Applications

Battery Operated Equipment
General Power Supply/Monitoring Applications
Handheld Devices
Server Backplanes

Features & Benefits

Programmable Current Limit Up to 1A
Two Current Ranges (Jumper Selectable)
Measure and Read Back Load Current, Load Voltage, and Set Point
Power Source Up to 30V
Jumper-Selectable I²C Address Setting for the MAX9611
6-Pin Pmod-Compatible Connector (I²C)
Secondary Header Allows Daisy-Chaining of Additional Modules on the I²C Bus
Example Software Written in C for Portability
RoHS Compliant
Proven PCB Layout
Fully Assembled and Tested

Resources

MAX9611EVKIT

View Detailed Evaluation Kit Information

The MAX9611 evaluation kit (EV kit) is an assembled and tested PCB used to evaluate the MAX9611 high-side current-sense amplifier with an integrated 12-bit ADC and a gain block that can be configured either as an op amp or as a comparator. The on-board microcontroller, which is connected to the PC through the universal serial bus (USB) port, acts as the I²C master.

The EV kit also includes Windows XP®-, Windows Vista®-, and Windows® 7-compatible software, which provides a simple user interface for exercising the device’s features. The program is menu driven and offers a graphical user interface (GUI) complete with control buttons and status displays.

The EV kit comes with the MAX9611AUB+ installed (noninverting configuration). Contact the factory for free samples of the pin-compatible MAX9612AUB+ (inverting configuration).

Applications

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

Features & Benefits

60V Current Sense with Integrated ADC
Windows XP-, Windows Vista-, and Windows 7-Compatible Software
On-Board Microcontroller to Generate I²C Commands
Easy-to-Use, Menu-Driven Software
USB-PC Connection (Cable Included)

Documentation & Resources

Data Sheets

MAX9611-MAX9612: High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator Data Sheet (Rev. 5)
1/21/2020
PDF

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
MAX9612AUB+	Material Declaration	Reliability Data	10-MINI_SO-N/A	Ultra Librarian SamacSys
MAX9612AUB+T	Material Declaration	Reliability Data	10-MINI_SO-N/A	Ultra Librarian SamacSys
Wafer Fabrication Data

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.