MAX9928
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MAX9928

-0.1V to +28V Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers

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Ultra-Small, 6-Bump UCSP Current-Sense Amplifiers with True -0.1V to +28V Input Range

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Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $1.19
Features
  • Wide -0.1V to +28V Common-Mode Range, Independent of Supply Voltage
  • 2.5V to 5.5V Operating Supply Voltage
  • 20µA Quiescent Supply Current
  • 0.4mV (max) Input Offset Voltage
  • Gain Accuracy Better than 1% (max)
  • SIGN Output Indicates Current Polarity
  • Transconductance and Gain Versions Available
    • 5µA/mV (MAX9928F)
    • 50V/V (MAX9929F)
  • Pin Compatible with the MAX4372 in UCSP
  • Available in Ultra-Small, 3x2 UCSP (1mm x 1.5mm) and 8-Pin µMAX Packages
Additional Details
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The MAX9928F/MAX9929F low-cost, uni-/bidirectional, high-side, current-sense amplifiers are ideal for monitoring battery charge and discharge currents in notebooks, cell phones, and other portable equipment. These devices feature a wide -0.1V to +28V input common-mode voltage range, low 20µA supply current with VOS less than 0.4mV, and a gain accuracy better than 1.0%. The input common-mode range is independent of the supply voltage, ensuring that the current-sense information remains accurate even when the measurement rail is shorted to ground.

The MAX9928F features a current output with a transconductance ratio of 5μA/mV. An external resistor converts the output current to a voltage, allowing adjustable gain so that the input sense voltage can be matched to the maximum ADC input swing. The MAX9929F has a voltage output and integrates a 10kΩ output resistor for a fixed voltage gain of 50V/V.

A digital SIGN output indicates direction of current flow, so the user can utilize the full ADC input range for measuring both charging and discharging currents.

The MAX9928F/MAX9929F are fully specified over the -40°C to +125°C automotive temperature range, and available in 6-bump UCSP™ (1mm x 1.5mm) and 8-pin µMAX® packages. The UCSP package is bump-to-bump compatible with the MAX4372_EBT.

Applications

  • General-System/Board-Level Current Monitoring
  • Monitoring Charge/Discharge Currents in Portable/Battery-Powered Systems
  • Notebook Computers
  • Precision Current Sources
  • Smart-Battery Packs/Chargers
  • Smart-Cell Phones
  • Super Capacitor Charge/Discharge
Part Models 4
1ku List Price Starting From $1.19

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX9928FABT+
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MAX9928FABT+T
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MAX9928FAUA+
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MAX9928FAUA+T
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Filter by Model

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Product Lifecycle

PCN

Jul 19, 2016

- 1594_AMENDED

ASSEMBLY

MAX9928FABT+T

PRODUCTION

Dec 8, 2015

- 1594_PRE-PCN

WAFER FAB

MAX9928FABT+T

PRODUCTION

Sep 19, 2018

- 1753N

ASSEMBLY

MAX9928FAUA+

PRODUCTION

MAX9928FAUA+T

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jul 19, 2016

- 1594_AMENDED

arrow down

ASSEMBLY

MAX9928FABT+T

PRODUCTION

Dec 8, 2015

- 1594_PRE-PCN

arrow down

WAFER FAB

MAX9928FABT+T

PRODUCTION

Sep 19, 2018

- 1753N

arrow down

ASSEMBLY

MAX9928FAUA+

PRODUCTION

MAX9928FAUA+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX9928EVKIT

Evaluation Kit for the MAX9928F, MAX9929F, and MAX4372

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MAX9928EVKIT

Evaluation Kit for the MAX9928F, MAX9929F, and MAX4372

Evaluation Kit for the MAX9928F, MAX9929F, and MAX4372

Features and Benefits

  • Precision Real-Time Current Monitoring
  • -0.1V to +28V Input Common-Mode Range
  • Evaluates MAX9928F, MAX9929F, and MAX4372
  • VOS < 0.4mV; Gain Error < 1%
  • SIGN Bit to Show Charge/Discharge Current Flow
  • Lead(Pb)-Free and RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX9928 evaluation kit (EV kit) provides a proven design to evaluate the MAX9928 uni-/bidirectional, high-side, current-sense amplifier, which offers precision accuracy specifications of VOS < 400µV and gain error < 1.0%. This EV kit demonstrates the MAX9928F in an ultra-small, 1mm x 1.5mm x 0.6mm, 6-bump UCSP™ package. The MAX9928 is also available in an 8-pin µMAX®, but that package is not compatible with this EV kit.

The MAX9928 EV kit PCB comes with a MAX9928FABT+ installed, which is the 5µA/mV gain version. The MAX9928 EV kit can also be used to evaluate the MAX9929F (50V/V). This EV kit can also evaluate the MAX4372 in a footprint-compatible UCSP package. Contact the factory for free samples of the pin-compatible MAX9929FABT+ device.

Applications

  • General-System/Board-Level Current Monitoring
  • Monitoring Charge/Discharge Currents in Portable/Battery-Powered Systems
  • Notebook Computers
  • Precision Current Sources
  • Smart-Battery Packs/Chargers
  • Smart-Cell Phones
  • Super Capacitor Charge/Discharge

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