DS2746

PRODUCTION

Low-Cost, 2-Wire Battery Monitor with Ratiometric A/D Inputs

2-Wire Fuel Gauge Measures Battery Current and Voltage and Includes Ratiometric Voltage Inputs that Can Be Used to Sample Thermistor, Pack ID, or Another Voltage Source

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Part Details

  • 14-Bit Bidirectional Current Measurement
    • 6.25µV LSB, ±51.2mV Dynamic Range
    • 416.7µA LSB, ±3.4A Range (RSNS = 15mΩ)
  • Current Accumulation Register Resolution
    • 6.25µVhr LSB, 409.6mVh Range
    • 417µAhr LSB, 27.31Ah Range
  • 11-Bit Battery Voltage Measurement
    • 2.44mV LSB, 0V to 4.997V Input Range
    • ±10mV Accuracy at 3.6V Input
  • Two 11-Bit Aux Input Voltage Measurements
    • Ratiometric Inputs Eliminate Supply Error
    • VOUT drives Dividers, Reduces Power
    • ±8 LSB Accuracy
  • Low Power Consumption:
    • Active Current: 70µA typical, 100µA max
    • Sleep Current: 1µA typical, 3µA max
DS2746
Low-Cost, 2-Wire Battery Monitor with Ratiometric A/D Inputs
DS2746 provides system-side battery capacity monitoring in cost-sensitive applications | Typical Operating Circuit
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Tools & Simulations


Evaluation Kits

DS2746EVKIT

Evaluation Kit for the DS2746

Features and Benefits

  • Demonstrates the capabilities of the DS2746 Low-Cost 2 Wire Battery Monitor with Ratiometric A/D Inputs including:
    • Voltage measurement
    • Current measurement
    • Current accumulation
    • A/D input measurements for ID or Thermistor Reading
  • Interfaces to the USB Port of a PC Running Windows XP® or Older Operating System

Product Details

The DS2746 evaluation kit (EV kit) makes performance evaluation, software development, and prototyping with the DS2746 Low-Cost 2 Wire Battery Monitor with Ratiometric A/D Inputs easy. The evaluation board interfaces to a PC through a DS9123O USB Adapter and RJ-11 cable connection.

Separate control tabs allow the user access to all memory locations, all control registers, and real-time updates of all monitored parameters. The software also incorporates a data-logging feature to monitor a cell over time.

The evaluation board circuit is designed to provide the DS2746 with accurate parameter measurements as well. Kit demonstration boards will vary as they are improved upon over time. For information on the demonstration board circuits refer to our website at www.maximintegrated.com.

Applications

  • 2.5G/3G Wireless Handsets
  • Digital Still and Video Cameras
  • Handheld Computers and Terminals
  • PDA/Smartphones

DS2746EVKIT
Evaluation Kit for the DS2746

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