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Data Sheet

FULL DATA SHEET (PDF, 424kB) Download   E-Mail

Description

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.

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

Application Notes

Application Note 3727: Storing Battery Fuel Gauge Parameters in the DS2781 - DS2781 Application Note 4114: Calibrating RSGAIN for the DS278x Family of Fuel Gauges - DS2781 Application Note 4188: Calibrating the Current Offset Bias (COB) Register for the DS278x Family of Fuel Gauges - DS2781

Evaluation Kits

none

Design Guides

BATTERY MANAGEMENT (PDF) POWER MANAGEMENT FOR BATTERY-POWERED EQUIPMENT (PDF)

Reliability Reports

Reliability Report: DS2781.pdf

Software/Models

none

Ordering Information
Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices: 1-7 of 7
DS2781	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2781G/T&R+W			TDFN;10 pin;13 mm² Dwg: 56-G0012-001A (PDF) Use pkgcode/variation: T1034+1*	-40°C to +85°C	See data sheet
DS2781G+			TDFN;10 pin;13 mm² Dwg: 56-G0012-001A (PDF) Use pkgcode/variation: T1034+1*	-40°C to +85°C	See data sheet
DS2781G+T&R			TDFN;10 pin;13 mm² Dwg: 56-G0012-001A (PDF) Use pkgcode/variation: T1034+1*	-40°C to +85°C	See data sheet
DS2781G-A2+T&R			TDFN;10 pin;13 mm² Dwg: 56-G0012-001A (PDF) Use pkgcode/variation: T1034+1*	-40°C to +85°C	See data sheet
DS2781K			TSSOP;8 pin;14 mm² Dwg: 56-G2021-000A (PDF) Use pkgcode/variation: H8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2781E+			TSSOP;8 pin;14 mm² Dwg: 56-G2021-000A (PDF) Use pkgcode/variation: H8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2781E+T&R			TSSOP;8 pin;14 mm² Dwg: 56-G2021-000A (PDF) Use pkgcode/variation: H8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Notes and Comments

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.

More Information

New Product Press Release 2006-01-20

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Description   Key Features   Applications/Uses   Key Specifications   Diagram

Data Sheet   Application Notes   Design Guides   Engineering Journals   Reliability Reports   Software/Models   Evaluation Kits

Price and Availability   Samples   Buy Online   Package Information   Lead-Free Information

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