DS2778
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DS2778

2-Cell, Fuel Gauge with FuelPack, Protector, and SHA-1 Authentication

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Industry's Smallest 2-Cell, Stand-Alone Fuel Gauge to Integrate an Li+ Protector and SHA-1 Authentication

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Part Models 2
1ku List Price Starting From $4.54
Features
  • High-Side nFET Drivers and Protection Circuitry
  • Precision Voltage, Temperature, and Current Measurement System
  • Cell-Capacity Estimation from Coulomb Count, Discharge Rate, Temperature, and Cell Characteristics
  • Estimates Cell Aging Between Learn Cycles
  • Uses Low-Cost Sense Resistor
  • Allows Calibration of Gain and Temperature Coefficient
  • Programmable Thresholds for Overvoltage and Overcurrent
  • Pack Authentication Using SHA-1 Algorithm (DS2776/DS2778)
  • 32-Byte Parameter EEPROM
  • 16-Byte User EEPROM
  • Maxim 1-Wire Interface with 64-Bit Unique ID (DS2775/DS2776)
  • 2-Wire Interface with 64-Bit Unique ID (DS2777/DS2778)
  • 3mm x 5mm, 14-pin TDFN Lead-Free Package
Additional Details
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The DS2775–DS2778 report available capacity for rechargeable lithium-ion (Li+) and Li+ polymer (Li-Poly) batteries in mAh and as a percentage of full. Safe operation is ensured by the integrated Li+ protector. The DS2776/DS2778 support SHA-1-based challenge-response authentication in addition to all other DS2775/DS2777 features.

Precision measurements of voltage, temperature, and current, along with a cell characteristics table and application parameters, are used for capacity estimation calculations. The capacity registers report a conservative estimate of the amount of charge that can be removed given the current temperature, discharge rate, stored charge, and application parameters.

The DS2775–DS2778 operate from +4.0V to +9.2V for direct integration into battery packs with two Li+ or Li- Poly cells.

In addition to nonvolatile storage for cell compensation and application parameters, the DS2775–DS2778 offer 16 bytes of EEPROM for use by the host system and/or pack manufacturer to store battery lot and date tracking information. The EEPROM can also be used for nonvolatile storage of system and/or battery usage statistics. A Maxim 1-Wire® (DS2775/DS2776) or 2-wire (DS2777/DS2778) interface provides serial communication to access measurement and capacity data registers, control registers, and user memory. The DS2776/DS2778 use the SHA-1 hash algorithm in a challenge-response pack authentication protocol for battery-pack verification.

Applications

  • Digital Still, Video, and Action Cameras
  • Handheld Computers and Terminals
  • Handheld Radios
  • Health and Fitness Monitors
  • Home and Building Automation, Sensors
  • Medical Devices
  • Power Tools
  • Smart Batteries
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file View Data Sheet (Rev.5)
Documentation View All Documentation
Part Models 2
1ku List Price Starting From $4.54
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DS2778

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Data Sheet

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UPDATED 02/09/2018
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DS2775-DS2778: 2-Cell, Fuel Gauge with FuelPack, Protector, and SHA-1 Authentication Data Sheet (Rev.5)

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UPDATED 09/09/2010
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DS2775-DS2778_cn: 2节电池电量计，带FuelPack算法、保护器和SHA-1安全认证 Data Sheet (Rev.3)

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UPDATED 08/16/2010
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DS2775-DS2778_jp: FuelPack、プロテクタ、およびSHA-1認証内蔵、2セル、残量ゲージ Data Sheet (Rev.3)

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Reliability Data

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UPDATED 01/12/2023
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DS2778 Reliability Data redirect icon

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Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
DS2778G+ Thin Dual Flatpack No Leads external-link
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DS2778G+T&R Thin Dual Flatpack No Leads external-link
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Software & Part Ecosystem

Evaluation Kits 4

DS2778EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

zoom

DS2778EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

download icon

Download

 print icon

Print
DS2778EVKIT
Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

Features and Benefits

  • Demonstrate the Capabilities of the DS2775–DS2778 Including:
    • Estimation of Available Capacity for Li+ Cells
    • 2-Cell Voltage Measurement
    • Current Measurement
    • Current Accumulation
    • Temperature Measurement
    • Information Storage
    • Identification
    • Overvoltage/Undervoltage Protection
    • Overcurrent/Short-Circuit Protection
    • Secure Challenge and Response Authentication Using the SHA-1 Algorithm (DS2776 and DS2778 Only)
    • Interface to the USB Port of a PC Running a Windows XP or Older OS That Supports USB Operation
Buy Now View Details

Product Detail

The DS2775–DS2778 evaluation kits (EV kits) make performance evaluation, software development, and prototyping with the DS2775–DS2778 2-cell stand-alone fuel-gauge ICs with Li-Ion (Li+) protector and SHA-1 authentication easy. The evaluation boards interface to a PC through a DS9123O USB adapter and RJ11 cable connection. The provided CD-ROM contains all related data sheets along with the evaluation software, which can be run under any Windows XP® or older operating system (OS) that supports USB operation.

The DS2775–DS2778 EV kit software gives the user complete control of all the DS2775–DS2778 functions. Separate control tabs allow the user access to all EEPROM and RAM memory locations, control registers, real-time updates of all monitored parameters, and SHA-1 functions. The software also incorporates a data-logging feature to monitor a cell over time.

The evaluation board circuit is designed to provide the DS2775–DS2778 with accurate parameter measurements. Kit demonstration boards vary as they are improved upon over time.

Applications

  • Commercial and Military Radios
  • DSLR Cameras
  • Low-Cost Notebooks
  • Portable Medical Equipment
  • UMPCs
  • Video Cameras

DS2775EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

zoom

DS2775EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

download icon

Download

 print icon

Print
DS2775EVKIT
Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

Features and Benefits

  • Demonstrate the Capabilities of the DS2775–DS2778 Including:
    • Estimation of Available Capacity for Li+ Cells
    • 2-Cell Voltage Measurement
    • Current Measurement
    • Current Accumulation
    • Temperature Measurement
    • Information Storage
    • Identification
    • Overvoltage/Undervoltage Protection
    • Overcurrent/Short-Circuit Protection
    • Secure Challenge and Response Authentication Using the SHA-1 Algorithm (DS2776 and DS2778 Only)
    • Interface to the USB Port of a PC Running a Windows XP or Older OS That Supports USB Operation
Buy Now View Details

Product Detail

The DS2775–DS2778 evaluation kits (EV kits) make performance evaluation, software development, and prototyping with the DS2775–DS2778 2-cell stand-alone fuel-gauge ICs with Li-Ion (Li+) protector and SHA-1 authentication easy. The evaluation boards interface to a PC through a DS9123O USB adapter and RJ11 cable connection. The provided CD-ROM contains all related data sheets along with the evaluation software, which can be run under any Windows XP® or older operating system (OS) that supports USB operation.

The DS2775–DS2778 EV kit software gives the user complete control of all the DS2775–DS2778 functions. Separate control tabs allow the user access to all EEPROM and RAM memory locations, control registers, real-time updates of all monitored parameters, and SHA-1 functions. The software also incorporates a data-logging feature to monitor a cell over time.

The evaluation board circuit is designed to provide the DS2775–DS2778 with accurate parameter measurements. Kit demonstration boards vary as they are improved upon over time.

Applications

  • Commercial and Military Radios
  • DSLR Cameras
  • Low-Cost Notebooks
  • Portable Medical Equipment
  • UMPCs
  • Video Cameras

DS2776EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

zoom

DS2776EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

download icon

Download

 print icon

Print
DS2776EVKIT
Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

Features and Benefits

  • Demonstrate the Capabilities of the DS2775–DS2778 Including:
    • Estimation of Available Capacity for Li+ Cells
    • 2-Cell Voltage Measurement
    • Current Measurement
    • Current Accumulation
    • Temperature Measurement
    • Information Storage
    • Identification
    • Overvoltage/Undervoltage Protection
    • Overcurrent/Short-Circuit Protection
    • Secure Challenge and Response Authentication Using the SHA-1 Algorithm (DS2776 and DS2778 Only)
    • Interface to the USB Port of a PC Running a Windows XP or Older OS That Supports USB Operation
Buy Now View Details

Product Detail

The DS2775–DS2778 evaluation kits (EV kits) make performance evaluation, software development, and prototyping with the DS2775–DS2778 2-cell stand-alone fuel-gauge ICs with Li-Ion (Li+) protector and SHA-1 authentication easy. The evaluation boards interface to a PC through a DS9123O USB adapter and RJ11 cable connection. The provided CD-ROM contains all related data sheets along with the evaluation software, which can be run under any Windows XP® or older operating system (OS) that supports USB operation.

The DS2775–DS2778 EV kit software gives the user complete control of all the DS2775–DS2778 functions. Separate control tabs allow the user access to all EEPROM and RAM memory locations, control registers, real-time updates of all monitored parameters, and SHA-1 functions. The software also incorporates a data-logging feature to monitor a cell over time.

The evaluation board circuit is designed to provide the DS2775–DS2778 with accurate parameter measurements. Kit demonstration boards vary as they are improved upon over time.

Applications

  • Commercial and Military Radios
  • DSLR Cameras
  • Low-Cost Notebooks
  • Portable Medical Equipment
  • UMPCs
  • Video Cameras

DS2777EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

zoom

DS2777EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

download icon

Download

 print icon

Print
DS2777EVKIT
Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

Features and Benefits

  • Demonstrate the Capabilities of the DS2775–DS2778 Including:
    • Estimation of Available Capacity for Li+ Cells
    • 2-Cell Voltage Measurement
    • Current Measurement
    • Current Accumulation
    • Temperature Measurement
    • Information Storage
    • Identification
    • Overvoltage/Undervoltage Protection
    • Overcurrent/Short-Circuit Protection
    • Secure Challenge and Response Authentication Using the SHA-1 Algorithm (DS2776 and DS2778 Only)
    • Interface to the USB Port of a PC Running a Windows XP or Older OS That Supports USB Operation
Buy Now View Details

Product Detail

The DS2775–DS2778 evaluation kits (EV kits) make performance evaluation, software development, and prototyping with the DS2775–DS2778 2-cell stand-alone fuel-gauge ICs with Li-Ion (Li+) protector and SHA-1 authentication easy. The evaluation boards interface to a PC through a DS9123O USB adapter and RJ11 cable connection. The provided CD-ROM contains all related data sheets along with the evaluation software, which can be run under any Windows XP® or older operating system (OS) that supports USB operation.

The DS2775–DS2778 EV kit software gives the user complete control of all the DS2775–DS2778 functions. Separate control tabs allow the user access to all EEPROM and RAM memory locations, control registers, real-time updates of all monitored parameters, and SHA-1 functions. The software also incorporates a data-logging feature to monitor a cell over time.

The evaluation board circuit is designed to provide the DS2775–DS2778 with accurate parameter measurements. Kit demonstration boards vary as they are improved upon over time.

Applications

  • Commercial and Military Radios
  • DSLR Cameras
  • Low-Cost Notebooks
  • Portable Medical Equipment
  • UMPCs
  • Video Cameras

Evaluation Kits4

DS2778EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

DS2775EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

DS2776EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

DS2777EVKIT

Evaluation Kit for the DS2775, DS2776, DS2777, and DS2778

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