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High-Accuracy Battery Fuel Gauge with Programmable Suspend Mode

Provides Key Hardware Components Required to Accurately Estimate Remaining Capacity by Integrating Low-Power Precision Measurements of Temperature, Voltage, Current, Current Accumulation, and Nonvolatile Data Storage

Product Details

Key Features

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Simplified Block Diagram

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Sampling:
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Parameters

Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type 1 Cell Li-Ion
3-Cell NiMH
Interface 1-Wire
User Data Storage (Bytes) 8 SRAM
96 EEPROM
Parameters Measured Current
Temperature
Voltage
End Equipment Pack
VSUPPLY (V) (min) 3
VSUPPLY (V) (max) 5.5
Package/Pins TSSOP/8
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
3.18

Key Features

  • Programmable Suspend Mode
  • Accurate Current Accumulation
    • 2% ±4µV over ±64mV Input Range
    • 2% ±200µA over ±3.2A with 20mΩ Sense
  • Current Measurement
    • 9-Bit Snapshot Measurement
    • 12-Bit Average Updated Every 88ms
    • 15-Bit Average Updated Every 2.8s
  • Voltage Measurement
    • 9-Bit Snapshot Measurement
    • 10-Bit Average Updated Every 4ms
  • Temperature Measurement
    • 10-Bit with 0.125°C Resolution
  • Snapshot mode allows instantaneous power measurement
  • Host Alerted When Accumulated Current or Temperature Exceeds Programmable Limits
  • 96 Bytes of Lockable EEPROM
  • 8 Bytes of General-Purpose SRAM
  • Dallas 1-Wire Interface with Unique 64-Bit Address and Standard or Overdrive Timing
  • 3mm Dimension of 8-Pin TSSOP Package Allows Mounting on Side of Thin Prismatic Li+ and Li+/Polymer Cells

Applications/Uses

Description

The DS2756 remains in production, however, for new projects, we recommend ModelGauge m5 MAX17201 fuel gauge.

The DS2756 high-precision battery fuel gauge is a data-acquisition and information-storage device tailored for cost-sensitive and space-constrained 1-cell Li+/polymer battery-pack applications. The DS2756 provides the key hardware components required to accurately estimate remaining capacity by integrating low-power, precision measurements of temperature, voltage, current, and current accumulation, as well as nonvolatile (NV) data storage, into the small footprint of a 3.0mm x 4.4mm 8-pin TSSOP package.

Through its 1-Wire® interface, the DS2756 gives the host system read/write access to status and control registers, instrumentation registers, and general-purpose data storage. Each device has a unique factory-programmed 64-bit net address that allows it to be individually addressed by the host system, supporting multibattery operation.

Simplified Block Diagram

DS2756 high-precision battery fuel gauge is a data-acquisition and information-storage device tailored for cost-sensitive and space-constrained 1-cell Li+/polymer battery-pack application | Typical Operating Circuit DS2756 high-precision battery fuel gauge is a data-acquisition and information-storage device tailored for cost-sensitive and space-constrained 1-cell Li+/polymer battery-pack application | Typical Operating Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.