Product Summary

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 onchip
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.

Features

Precision Voltage, Temperature, and Current
Measurement System
Operates in One-Cell or Two--Cell Applications
Accurate, Temperature Stable Internal Time
Base
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 Tempco Calibration Allows the Use of
Low-Cost Sense Resistors
24-Byte Battery/Application Parameter EEPROM
16-Byte User EEPROM
Unique ID and Multidrop 1-Wire Interface
Tiny 8-Pin TSSOP Package Embeds Easily in
Battery Packs Using Thin Prismatic Cells

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
DS2781E+T&R
DS2781E+T&R
Maxim Integrated Products
Battery Management 1-2 Cell Stand-Alone Fuel Gauge
Data Sheet
0-2080: $1.99
2080-2500: $1.99
Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
DS2702U
DS2702U
Maxim Integrated Products
Battery Management Battery Comm ASIC
Data Sheet
0-1: $1.28
1-25: $0.85
25-50: $0.78
50-100: $0.58
DS2702U/T&R
DS2702U/T&R
Maxim Integrated Products
Battery Management Battery Comm ASIC
Data Sheet
0-2480: $0.52
2480-3000: $0.52
DS2703
DS2703
Other

Data Sheet
Negotiable 
DS2703G+T&R
DS2703G+T&R
Maxim Integrated Products
Battery Management SHA-1 Battery Pack Authentication
Data Sheet
0-7430: $0.84
7430-10000: $0.84
DS2703G-C1+T&R
DS2703G-C1+T&R
Maxim Integrated Products
Battery Management
Data Sheet
Negotiable 
DS2703G-CE+T&R
DS2703G-CE+T&R
Maxim Integrated Products
Battery Management
Data Sheet
Negotiable