DS2745

Low-Cost I²C Battery Monitor

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


Please check latest availability status for a specific part variant.

Description

The DS2745 remains in production, however, for new projects, we recommend ModelGauge m5 MAX17055 fuel gauge.

The DS2745 provides current-flow, voltage, and temperature measurement data to support battery-capacity monitoring in cost-sensitive applications. The DS2745 can be mounted on either the host side or pack side of the application. Current measurement and coulomb counting is accomplished by monitoring the voltage drop across an external sense resistor, voltage measurement is accomplished through a separate voltage-sense input, and temperature measurement takes place on-chip. A standard I²C interface with software programmable address gives the controlling microprocessor access to all data and status registers inside the DS2745. A low-power sleep mode state conserves energy when the cell pack is in storage.
DS2745 provides current-flow, voltage, and temperature measurement data to support battery-capacity monitoring in cost-sensitive applications | Block Diagram DS2745 provides current-flow, voltage, and temperature measurement data to support battery-capacity monitoring in cost-sensitive applications | Block Diagram Enlarge+

Key Features

  • 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

Applications/Uses

  • Cellular
  • GPS
  • Handheld Products
  • PDAs
Part NumberFunctionsBattery TypeInterfaceParameters MeasuredApplicationsVSUPPLY
(V)
VSUPPLY
(V)
Package/PinsOper. Temp.
(°C)
Budgetary
Price
minmaxSee Notes
DS2745 Fuel Gauge
1 Cell Li-Ion
3-Cell NiMH
2-Wire
Current
Temperature
Voltage
Host2.55.5
µMAX/8
-40 to +85$2.16 @1k
See All Battery Monitors, Protectors, and Selectors (45)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


DS2745EVKIT: Evaluation Kit for the DS2745

CAD Symbols and Footprints

  • DS2745U+
  • DS2745U+T&R
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
    Status:
    Package:
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