Maxim Integrated DS2781E T&R

Description
The DS2781 is a fuel gauge IC that measures voltage, temperature, and current to estimate the available capacity of rechargeable Lithium-Ion and Lithium-Ion Polymer batteries. It stores cell stack characteristics and application parameters in on-chip EEPROM. The available capacity registers provide a conservative estimate of the charge that can be removed based on temperature, discharge rate, stored charge, and application parameters.

Features
Precision voltage, temperature, and current measurement system
Operates in one-cell or two-cell applications
Accurate, temperature-stable internal timebase
Absolute and relative capacity estimation from Coulomb count, discharge rate, temperature, and battery cell characteristics
Accurate warning of low battery conditions
Automatic backup of Coulomb count and age estimation to nonvolatile EEPROM
Gain and temperature coefficient calibration for low-cost sense resistors
24-byte parameter EEPROM
16-byte user EEPROM
Unique ID and multidrop 1-Wire interface
Tiny 8-pin TSSOP and 10-pin TDFN (3mm x 4mm) packages

Applications
Digital video cameras
Commercial two-way radios
Industrial PDAs and handheld PC data terminals
Portable GPS navigation systems