DS2745

PRODUCTION

Low-Cost I²C Battery Monitor

Low-cost battery fuel gauge that monitors current, voltage, and temperature

Data Sheet (Rev. 2) Product Selection Table
Part Models
2
1ku List Price
Starting From $2.84
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Part Details

  • 16-Bit Bidirectional Current Measurement
    • 1.56µV LSB, ±51.2mV Dynamic Range
    • 104µA LSB, ±3.4A Dynamic Range (RSNS = 15mΩ)
  • Current Accumulation Register Resolution
    • 6.25µVhr LSB, ±204.8mVh Range
    • 0.417mAhr LSB, ±13.65Ah Range (RSNS = 15mΩ)
  • 11-Bit Voltage Measurement
  • 4.88mV LSB, 0V to 5V Input Range
  • 11-Bit Temperature Measurement
  • 0.125°C Resolution, -20°C to +70°C
  • Industry Standard I²C Interface
  • Low Power Consumption:
    • Active Current: 70µA typical, 100µA max
    • Sleep Current: 1µA typical, 3µA max
DS2745
Low-Cost I²C Battery Monitor
DS2745 provides current-flow, voltage, and temperature measurement data to support battery-capacity monitoring in cost-sensitive applications | Block Diagram
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 2

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Hardware Ecosystem

Parts Product Life Cycle Description
Battery Fuel Gauge and Coulomb Counter 3
DS2740
PRODUCTION High-Precision Coulomb Counter
DS2764
PRODUCTION High-Precision Li+ Battery Monitor with 2-Wire Interface
DS2782
PRODUCTION Stand-Alone Fuel Gauge IC
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Tools & Simulations

Software Development 1

Evaluation Kits

DS2745EVKIT

Evaluation Kit for the DS2745

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Features and Benefits

  • Demonstrates the capabilities of the DS2745 Low Cost I²C Battery Monitor, including:
    • Temperature measurement
    • Voltage measurement
    • Current measurement
    • Current accumulation
  • Interfaces to the USB of a PC running Windows XP® or older operating system

Product Details

The DS2745 evaluation kit (EV kit) makes performance evaluation, software development, and prototyping with the DS2745 Low-Cost I²C Battery Monitor easy. The evaluation board interfaces to a PC through a DS9123O USB Adapter and RJ-11 cable connection.

The DS2745 EV kit evaluation software gives the user complete control of all functions of the DS2745. Separate control tabs allow the user access to all RAM 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 DS2745 with accurate parameter measurements and protect the DS2745 from ESD damage.

Applications

  • Cellular
  • GPS
  • Handheld Products
  • PDAs
DS2745EVKIT
Evaluation Kit for the DS2745

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