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

Measure Four Decades of Dynamic Range without Increasing Measurement Errors

Product Details

Key Features

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 10
25
50
100
VOS @25°C (µV) (max) 10
Output Format Voltage
CMVR (V) (min) -0.1
CMVR (V) (max) 36
VCC (V) (min) 1.7
VCC (V) (max) 5.5
ICC (µA) (typ) 21
Bi-Dir. Curr. Sense No
Gain 100 V/V
200 V/V
50 V/V
500 V/V
Gain Accuracy @25°C (%) (max) 0.15
Oper. Temp. (°C) -40 to +125
Package/Pins SOT23/6
WLP/6
Budgetary
Price (See Notes)
1.04
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Simplified Block Diagram

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Parameters

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 10
25
50
100
VOS @25°C (µV) (max) 10
Output Format Voltage
CMVR (V) (min) -0.1
CMVR (V) (max) 36
VCC (V) (min) 1.7
VCC (V) (max) 5.5
ICC (µA) (typ) 21
Bi-Dir. Curr. Sense No
Gain 100 V/V
200 V/V
50 V/V
500 V/V
Gain Accuracy @25°C (%) (max) 0.15
Oper. Temp. (°C) -40 to +125
Package/Pins SOT23/6
WLP/6
Budgetary
Price (See Notes)
1.04

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

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.

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Simplified Block Diagram

MAX44284: Typical Application Circuit MAX44284: Typical Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .