MAX9934

PRODUCTION

High-Precision, Low-Voltage, Current-Sense Amplifier with Current Output and Chip Select for Multiplexing

Chip Select Allows Users to Mux Multiple MAX9934s onto a Single ADC Input

Data Sheet (Rev. 3) Product Selection Table
Part Models
5
1ku List Price
Starting From $1.39
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Part Details

  • Input Offset Voltage: 10µV (max)
  • Gain Error Less than 0.25%
  • -0.1V to +5.5V Input Common-Mode Voltage Range
  • Chip Select Allows Multiplexing Several MAX9934 Current Monitors to One ADC
  • Current Output Allows ROUT Selection for Gain Flexibility
  • Single Supply Operation: 2.5V to 3.6V
  • Two Gain Options: GM of 25µA/mV (MAX9934T) and 5µA/mV (MAX9934F)
  • Bidirectional or Unidirectional Operation
  • Small, 6-Bump UCSP (1mm x 1.5mm x 0.6mm) and 8-Pin µMAX Packages
MAX9934
High-Precision, Low-Voltage, Current-Sense Amplifier with Current Output and Chip Select for Multiplexing
MAX9934: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

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Evaluation Kits

MAX9934TEVKIT

Evaluation Kit for the MAX9934

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Features and Benefits

  • EV Kit Configured for Bidirectional Current Sensing Up to 1A
  • EV Kit Configured for 250V/V Gain
  • Chip-Select (CS) Logic Input
  • -0.1V to +5.5V Input Common-Mode Range
  • +2.5V to +3.6V DC Power-Supply Operation
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX9934T evaluation kit (EV kit) demonstrates the MAX9934T low-voltage, precision, current-sense amplifier for power management in portable consumer electronics. The device's precision inputs and the EV kit's on-board, precision, low-value sense resistor allows the measurement of bidirectional (e.g., battery charge/discharge) currents up to 1A. Input common-mode range is -0.1V to +5.5V independent of supply. The device demonstrates a 25µA/mV fixed gain and the EV kit is configured for a 250V/V gain. The device's chip-select (CS) logic input allows users to multiplex several MAX9934T parts. The EV kit operates from a +2.5V to +3.6V, 100mA DC power supply.

The EV kit can also be used to evaluate the MAX9934F current-sense amplifier. See the Evaluating the MAX9934F section in the full data sheet for more information.

Applications

  • MP3 Players
  • Notebook PCs and Ultra-Mobile PCs
  • PDAs and Smartphones
  • Portable Current Monitoring
  • Sensor Instrumentation Amplifiers
MAX9934TEVKIT
Evaluation Kit for the MAX9934

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