MAX9919
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MAX9919

-20V to +75V Input Range, Precision Uni-/Bidirectional, Current-Sense Amplifiers

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Current-Sense Amplifiers with Input Common Range that Extends Well Below Ground (-20V)

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Info: : PRODUCTION tooltip
Part Details
Part Models 8
1ku List Price Starting From $1.32
Features
  • Reduce Protective Clamping for High Inductive Kickback Voltage
    • -20V to +75V Input Common-Mode Voltage Range
  • Supports Wide Range of Precision AC and DC Current Sensing Applications
    • Uni- or Bidirectional Current Sensing
    • 0.6% (max) Gain Accuracy Error
    • 400µV (max) Input Offset Voltage
    • 120kHz, -3dB Bandwidth (MAX9919N)
    • Reference Input for Bidirectional OUT
    • Rail-to-Rail Output
  • Saves Board Space
    • 8-Pin SOIC Package
    • Single-Supply Operation (4.5V to 5.5V)
  • AEC-Q100 Qualified (MAX9918ASA/V+, MAX9919FASA/V+, MAX9919NASA/V+, MAX9920ASA/V+ Only)
Additional Details
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The MAX9918/MAX9919/MAX9920 are single-supply, high-accuracy current-sense amplifiers with a high input common-mode range that extends from -20V to +75V. These amplifiers are well suited for current monitoring of inductive loads such as motors and solenoids, where common-mode voltages can become negative due to inductive kickback, reverse-battery conditions, or transient events.

The MAX9918/MAX9920 feature adjustable gain set by an external resistive-divider network. The MAX9919 features fixed gains of 45V/V (MAX9919F) and 90V/V (MAX9919N). The MAX9918/MAX9919/MAX9920 operate as unidirectional amplifiers when VREFIN = GND and as bidirectional amplifiers when VREFIN = VCC/2. The MAX9920 attenuates the input signal by a factor of 4 at the input level-shifting stage allowing the device to sense voltages up to 200mV (unidirectional operation) or ±100mV (bidirectional operation).

The MAX9918/MAX9919/MAX9920 operate with a single 5V supply voltage, are fully specified over the -40°C to +125°C automotive temperature range, and are available in an 8-pin SOIC package.

Applications

  • Automotive
  • Current Monitoring of Inductive Loads
  • H-Bridge Motor Current Sensing
  • High- and Low-Side Precision Current Sensing
  • Precision High-Voltage Current Monitoring
  • Solenoid Current Sensing
  • Super-Capacitor Charge/Discharge Monitoring
Part Models 8
1ku List Price Starting From $1.32

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX9919FASA+
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MAX9919FASA+T
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MAX9919FASA/V+
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MAX9919FASA/V+T
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MAX9919NASA+
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MAX9919NASA+T
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MAX9919NASA/V+
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MAX9919NASA/V+T
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Part Models

Product Lifecycle

PCN

Jan 17, 2018

- 1721F

ASSEMBLY

MAX9919FASA/V+

PRODUCTION

MAX9919FASA/V+T

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Jan 17, 2018

- 1721F

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ASSEMBLY

MAX9919FASA/V+

PRODUCTION

MAX9919FASA/V+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX9918EVKIT

Evaluation Kit for the MAX9918

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MAX9918EVKIT

Evaluation Kit for the MAX9918

Evaluation Kit for the MAX9918

Features and Benefits

  • Wide -20V to +75V Input Range Independent of Supply Voltage
  • Operates Off a Single +5V Supply
  • Unidirectional or Bidirectional Operation
  • Lead(Pb)-Free and RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX9918 evaluation kit (EV kit) provides a proven design to evaluate the MAX9918 wide input range, precision unidirectional/bidirectional, current-sense amplifier in an 8-pin SO package. The EV kit features Kelvin connections for force and sense at the amplifier inputs and a very precise current-sense resistor with a tolerance of ±0.5%. Various test points are included for additional evaluation.

The MAX9918 EV kit PCB comes with a MAX9918ASA+ installed. Contact the factory for free samples of the pin-compatible MAX9919FASA+, MAX9919NASA+, and MAX9920ASA+ to evaluate these devices.

Applications

  • 4x4 Transmission Control
  • Current Monitoring of Inductive Loads
  • Electronic Throttle Control
  • H-Bridge Motor Current Sensing
  • High- and Low-Side Precision Current Sensing
  • Precision High-Voltage Current Monitoring
  • Solenoid Current Sensing
  • Super-Capacitor Charge/Discharge Monitoring in Hybrid Cars

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