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MAX44284

MAX44284

36V, Input Common-Mode, High-Precision, Low-Power Current-Sense Amplifier

Measure Four Decades of Dynamic Range without Increasing Measurement Errors

Data Sheet
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Overview

Description

The MAX44284 is a high-side, current-sense amplifier that operates with a 1.7V to 5.5V single supply and is optimized for very low power operation with only 21µA of quiescent current.

The MAX44284 offers precision accuracy specifications of 2µV VOS and gain error of 0.05%. The device features an input common-mode voltage range from -0.1V to +36V. This current-sense amplifier has a voltage output and is offered in four different gain versions.

The MAX44284 is offered in small 6-bump, 0.4mm-pitch WLP (1.3mm x 0.9mm) and 6-pin SOT23 packages and is specified for operation over the -40°C to +125°C automotive temperature range.

MAX44284: Typical Application Circuit MAX44284: Typical Application Circuit Enlarge+

Key Features

  • Supports Use of Small Current-Sense Resistors to Improve Power-Supply Conversion Efficiency and Measurement Accuracy
    • Input Bias Current of 80nA (max)
    • Very Low 2µV Input Offset Voltage (MAX44284F/H)
    • Extremely Low 50nV/°C Input Offset Tempco Coefficient
    • -0.1V to +36V Wide Input Common-Mode Range
    • Low 0.05% Gain Error
  • Extends Battery Life
    • Low Supply Current of 21µA
    • 1.7V to 5.5V Single Supply
    • Shutdown Input (Independent of VDD)
  • Four Fixed Gain Options Simplify Design
    • 50V/V – MAX44284F
    • 100V/V – MAX44284H
    • 200V/V – MAX44284W
    • 500V/V – MAX44284E

Applications/Uses

  • Base-Stations
  • DC-DC Current Sensing in Power Management
  • Medical Pulse Oximeters and Infusion Pumps
  • Notebook Computers
  • Portable-/Battery-Powered Systems
  • Smartphones and Tablets

Parametric Specs

Part NumberOutput FormatCMVR
(V)		CMVR
(V)		VCC
(V)		VCC
(V)		ICC
(µA)		Bi-Dir. Curr. SenseVSENSE_FS
(mV)		VOS @25°C
(µV)		GainGain Accuracy @25°C
(%)		BW
(kHz)		Comp-
arators		Oper. Temp.
(°C)		Package/PinsBudgetary
Price
minmaxminmaxtyprecomm.maxmax@ -3dBSee Notes
MAX44284 Voltage-0.1361.75.521No
10
25
50
100
10
50 V/V
100 V/V
200 V/V
500 V/V
0.1530-40 to +125
SOT-23/6
WLP/6
$0.93 @1k
See All Current Sense Amplifiers (53)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources


MAX44284EVKIT: Evaluation Kit for the MAX44284

Technical Documents

App Note 6329 How to Accurately Calculate Overcurrent in High-Side Current-Sense Amplifiers

Quality and Environmental Data

Product Reliability Reports: MAX44284.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Topmark Coding MAX44284

Tools & Models

  • MAX44284 Orcad Library

    • CAD Symbols and Footprints

  • MAX44284EAUT+
  • MAX44284EAUT+T
  • MAX44284EAWT+
  • MAX44284EAWT+T
  • MAX44284FAUT+
  • MAX44284FAUT+T
  • MAX44284FAWT+
  • MAX44284FAWT+T
  • MAX44284HANT+
  • MAX44284HANT+T
  • MAX44284HAUT+
  • MAX44284HAUT+T
  • MAX44284HAWT+
  • MAX44284HAWT+T
  • MAX44284WAUT+
  • MAX44284WAUT+T
  • MAX44284WAWT+
  • MAX44284WAWT+T
    •

    Quality And Environmental

    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

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    Tools & Models

    Technical Docs

    Reference Designs

    Type ID Title
    Evaluation Board8476MAX44284EVKIT Evaluation Kit for the MAX44284