Features and Benefits
- Low-Cost, Compact, Current-Sense Solution
- Three Gain Versions Available
- +20V/V (MAX4073T)
- +50V/V (MAX4073F)
- +100V/V (MAX4073H)
- ±1.0% Full-Scale Accuracy
- 500µA Supply Current
- Wide 1.8MHz Bandwidth
- +3V to +28V Operating Supply
- Wide +2V to +28V Common-Mode Range Independent of Supply Voltage
- Automotive Temperature Range (-40°C to +125°C)
- Available in Space-Saving 5-Pin SC70 Package
The MAX4073 low-cost, high-side current-sense amplifier features a voltage output that eliminates the need for gain-setting resistors making it ideal for cell phones, notebook computers, PDAs, and other systems where current monitoring is crucial. High-side current monitoring does not interfere with the ground path of the battery charger making the MAX4073 particularly useful in battery-powered systems. The input common-mode range of +2V to +28V is independent of the supply voltage. The MAX4073's wide 1.8MHz bandwidth makes it suitable for use inside battery-charger control loops.
The combination of three gain versions and a selectable external-sense resistor sets the full-scale current reading. The MAX4073 offers a high level of integration, resulting in a simple and compact current-sense solution.
The MAX4073 operates from a +3V to +28V single supply and draws only 0.5mA of supply current. This device is specified over the automotive operating temperature range (-40°C to +125°C) and is available in a space-saving 5-pin SC70 package (half the size of the SOT23).
For a similar device in a 6-pin SOT23 with a wider common-mode voltage range (0 to +28V), see the MAX4173 data sheet.
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 (1)
The MAX4073 evaluation kit (EV kit) is an assembled and tested PCB used to evaluate the MAX4073 high-side current-sense amplifier, which is designed for low-cost, compact, current-sense applications. The EV kit has a 2V to 28V input common-mode sense-voltage range that is independent of the supply voltage. The EV kit comes assembled with the MAX4073F IC (internal gain = 50V/V), but can also evaluate the MAX4073T/MAX4073H (internal gains of 20/100, respectively) ICs.
Features & Benefits
- High-Side Current Sensing
- Multiple Fixed Gains Available
- 20V/V (MAX4073T)
- 50V/V (MAX4073F)
- 100V/V (MAX4073H)
- 3V to 28V Operating Supply (VCC)
- 2V to 28V Common-Mode Range Independent of Supply Voltage
- Lead(Pb)-Free and RoHS Compliant
- Fully Assembled and Tested
Documentation & Resources
DC Error Budget Calculator Simplifies Selection of Optimal Current-Sense Amplifiers4/9/2013
Performance of Current-Sense Amplifiers with Input Series Resistors1/3/2007
Creating a Bidirectional Current-Sense Amplifier from Two Unidirectional Current-Sense Amplifiers9/22/2006
High-Side Current-Sense Measurement: Circuits and Principles11/19/2001
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.
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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.