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Status
Part Number	Status
DS2781	Active: In Production. But some versions of the family are No Longer Available. See Ordering Information.

Description

FULL DATA SHEET (PDF, 424kB) Download   E-Mail The DS2781 measures voltage, temperature, and current, and estimates available capacity for rechargeable Lithium-Ion and Lithium-Ion Polymer batteries. Cell stack characteristics and application parameters used in the calculations are stored in on-chip EEPROM. The available 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. Capacity estimation is reported in milliamp hours remaining and percentage of full.

An evaluation kit is available:  DS2781EVKIT  

NOTE: This product requires use of the following:

DS2781K Evaluation Kit Software

Key Features		Applications/Uses
Precision Voltage, Temperature, and Current Measurement System Operates in One-Cell or Two--Cell Applications Accurate, Temperature Stable Internal Timebase Absolute and Relative Capacity Estimated 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 (NV) EEPROM Gain and Temperature Coefficient Calibration Allows the Use of 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 Embed Easily in Thin Prismatic Cell Packs		Commercial Two-Way Radios Digital Video Cameras Industrial PDAs and Handheld PC Data Terminals Portable GPS Navigation Systems

Key Specifications:  Battery Protectors, Selectors and Monitors
Part Number	Functions	Battery Type	Interface	User Data Storage (Bytes)	Parameters Measured	VSUPPLY (V)	VSUPPLY (V)	Package/Pins	Smallest Available Pckg. (mm2)	Oper. Temp. (°C)	Price
						min	max		max w/pins		See Notes
DS2781	Fuel Gauge	1-2 Cell Li-Ion	1-Wire	40 EEPROM	Current Temperature Voltage	2.5	10	TDFN/10 TSSOP/8	11	-40 to +85	$2.90 @1k
See All Battery Protectors, Selectors and Monitors (25)

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Typical Operating Circuit

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2008-07-03
This page last modified: 2009-10-14