DS2784

PRODUCTION

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

Industry's First Complete Fuel Gauge Solution to Integrate a 1-Cell Li+ Protector and SHA-1 Authentication System

Data Sheet (Rev. 5) Product Selection Table

Part Models: 2
1ku List Price: Starting From $5.19

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Part Details

Precision Voltage, Temperature, and Current Measurement System
Available Capacity Estimated from Coulomb Count, Discharge Rate, Temperature, and Cell Characteristics
Estimates Cell Aging Using Learn Cycles
Uses Low-Cost Sense Resistor
Allows for Calibration of Gain and Temperature Coefficient
Li+ Safety Circuitry—Overvoltage, Undervoltage, Overcurrent, Short-Circuit Protection
Programmable Safety Thresholds for Overvoltage and Overcurrent
Authentication Using SHA-1 Algorithm and 64-Bit Secret
32-Byte Parameter EEPROM
16-Byte User EEPROM
Dallas 1-Wire Interface with 64-Bit Unique ID
Tiny, Pb-Free, 14-Pin TDFN Package Embeds Easily in Battery Packs Using Thin Prismatic Cells

Part Models: 2
1ku List Price: Starting From $5.19

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
DS2784G+	Thin Dual Flatpack No Leads	Material Declaration Reliablity Data	Ultra Librarian SamacSys
DS2784G+T&R	Thin Dual Flatpack No Leads	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

Software Development 2

Evaluation Kits

Evaluation Kit for the DS2784

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Features and Benefits

Demonstrates the Capabilities of the DS2784 Including:
- Estimation of Available Capacity for Li+ Cells
- 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
Interfaces to the USB Port of a PC Running Windows XP or Older OS That Supports USB Operation

Product Details

The DS2784 evaluation kit (EV kit) allows easy performance evaluation, software development, and prototyping with the DS2784 1-cell stand-alone fuel gauge IC with Li-Ion (Li+) protector and SHA-1 authentication. The evaluation board interfaces to a PC through a DS9123O USB adapter and RJ-11 cable connection. The provided CD-ROM contains all related data sheets along with the evaluation software, which can be run under Windows XP® or older operating system that supports USB operation.

The DS2784 EV kit evaluation software gives the user complete control of all the DS2784 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 DS2784 with accurate parameter measurements. Kit demonstration boards vary as they are improved upon over time.

Applications

Cordless VoIP Phones
Digital Still and Video Cameras
Portable GPS Navigation
Smartphones/PDAs

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Part Details

Documentation

Data Sheet 1

Reliability Data 1

Design Note 4

Technical Articles 3