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Dual-Channel, High-Precision, High-Voltage, Current-Sense Amplifier

Unique Combination of High-Accuracy and High-Voltage Operation at 76V

Product Details

The MAX44285 dual-channel high-side current-sense amplifier has precision accuracy specifications of VOS less than 10µV (max) and gain error less than 0.1% (max).

The MAX44285 features an input common-mode voltage range from 2.7V to 76V with 80kHz of small-signal bandwidth, which makes it ideal for interfacing with a SAR ADC for multichannel multiplexed data acquisition systems.

The MAX44285 operates over the -40°C to +125°C temperature range. The MAX44285 is offered in 8-bump WLP and 8-pin µMAX® packages.

Key Features

  • 2.7V to 76V Input Common Mode
  • Low 12µV (max) Input Offset Voltage
  • Low 0.1% (max) Gain Error
  • Gain Options
    • G = 12.5V/V (MAX44285L)
    • G = 20V/V (MAX44285T)
    • G = 50V/V (MAX44285F)
    • G = 100V/V (MAX44285H)
  • 1mm x 2mm 8-Bump WLP and 8-Pin µMAX Packages

Applications/Uses

  • Base Stations and Communication Equipment
  • Industrial Control and Automation
  • Power Management Systems
  • Server Backplanes
Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 125
VOS @25°C (µV) (max) 10
Output Format Voltage
CMVR (V) (min) 2.7
CMVR (V) (max) 76
VCC (V) (min) 2.7
VCC (V) (max) 5.5
Bi-Dir. Curr. Sense No
Gain 20 V/V
Gain Accuracy @25°C (%) (max) 0.1
Oper. Temp. (°C) -40 to +125
Package/Pins UMAX/8
WLP/8
Budgetary
Price (See Notes)
$2.49 @1k
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Simplified Block Diagram

MAX44285: Typical Operating Circuit MAX44285: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

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Description

The MAX44285 evaluation kit (EV kit) provides a proven design to evaluate the MAX44285 dual-channel, high-precision, high-voltage, current-sense amplifier. This EV kit demonstrates the MAX44285 in an ultra-small, 1mm x 2mm, 8-bump WLP package.

The EV kit PCB comes with a MAX44285TAWA+ installed, which is the 20V/V gain version. Other gain options are available. Contact the factory for the pin-compatible MAX44285LAWA+ (G = 12.5V/V), MAX44285FAWA+ (G = 50V/V), and MAX44285HAWA+ (G = 100V/V).

View Details

Features

  • Precision Real-Time Current Monitoring
  • +2.7V to +76V Input Common-Mode Range
  • Proven PCB Layout
  • Fully Assembled and Tested

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SIMULATION MODELS

MAX44285 Macromodel

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SIMULATION MODELS

MAX44285 Orcad Library

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Support & Training

Search our knowledge base for answers to your technical questions.

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

Parameters

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 125
VOS @25°C (µV) (max) 10
Output Format Voltage
CMVR (V) (min) 2.7
CMVR (V) (max) 76
VCC (V) (min) 2.7
VCC (V) (max) 5.5
Bi-Dir. Curr. Sense No
Gain 20 V/V
Gain Accuracy @25°C (%) (max) 0.1
Oper. Temp. (°C) -40 to +125
Package/Pins UMAX/8
WLP/8
Budgetary
Price (See Notes)
$2.49 @1k

Key Features

  • 2.7V to 76V Input Common Mode
  • Low 12µV (max) Input Offset Voltage
  • Low 0.1% (max) Gain Error
  • Gain Options
    • G = 12.5V/V (MAX44285L)
    • G = 20V/V (MAX44285T)
    • G = 50V/V (MAX44285F)
    • G = 100V/V (MAX44285H)
  • 1mm x 2mm 8-Bump WLP and 8-Pin µMAX Packages

Applications/Uses

  • Base Stations and Communication Equipment
  • Industrial Control and Automation
  • Power Management Systems
  • Server Backplanes

Description

The MAX44285 dual-channel high-side current-sense amplifier has precision accuracy specifications of VOS less than 10µV (max) and gain error less than 0.1% (max).

The MAX44285 features an input common-mode voltage range from 2.7V to 76V with 80kHz of small-signal bandwidth, which makes it ideal for interfacing with a SAR ADC for multichannel multiplexed data acquisition systems.

The MAX44285 operates over the -40°C to +125°C temperature range. The MAX44285 is offered in 8-bump WLP and 8-pin µMAX® packages.

Simplified Block Diagram

MAX44285: Typical Operating Circuit MAX44285: Typical Operating 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.