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DS2782

Stand-Alone Fuel Gauge IC

2-wire stand-alone fuel-gauge IC calculates remaining battery capacity and simplifies software development

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The DS2782 measures voltage, temperature and current, and estimates available capacity for rechargeable lithium ion and lithium-ion polymer batteries. Cell 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 reported in mAh remaining and percentage of full.

Data Sheet

Download	Rev 4	(PDF, 452kB)
E-Mail

Errata DS2782 2782A2.pdf

An evaluation kit is available: DS2782EVKIT

NOTE: This product uses the following:
DS2782K_EVKit_Installation_v1_91_092811.zip

Key Features

Precision Voltage, Temperature, and Current Measurement System
Accurate 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 User EEPROM or 16-Byte User EEPROM and Unique 64-Bit ID
Industry 2-Wire Interface with Programmable Slave Address
Tiny 8-Pin TSSOP and 10-TDFN Packages Embed Easily in Thin Prismatic Cell Packs

Applications/Uses

3G Multimedia Wireless Handsets
Digital Still Cameras
Handheld PC Data Terminals
Subnotebook Computers

Key Specifications:

Battery Protectors, Selectors and Monitors

Part Number

Functions

Battery Type

Interface

User Data Storage
(Bytes)

Parameters Measured

V_SUPPLY
(V)

Package/Pins

Smallest Available Pckg.
(mm²)

Oper. Temp.
(°C)

Budgetary Price

min

max

max w/pins

See Notes

DS2782

Fuel Gauge

1-2 Cell Li-Ion

2-Wire

40 EEPROM

Current

Temperature

Voltage

2.5

5.5

TDFN/10

TSSOP/8

20.3

-40 to +85

$2.41 @1k

See All Battery Protectors, Selectors and Monitors (29)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

Application Notes

Application Note 3463		Getting Started with the DS2780
Application Note 3584		Storing Battery Fuel Gauge Parameters in DS2780
Application Note 4114		Calibrating RSGAIN for the DS278x Family of Fuel Gauges
Tutorial 4686		Important Design Considerations for Heart-Rate and Fitness Monitors
Tutorial 4691		Introduction to Hearing Aids and Important Design Considerations

Reliability Reports

Reliability Report:

DS2782.pdf

Software/Models

DS2782K_EVKit_Installation_v1_91_092811.zip

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2782E+			Active	TSSOP;8 pin;20.3 mm² Outline Drawing:21-0175 (PDF) Land Pattern: 90-0248 (PDF) Use pkgcode/variation: H8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2782E+T&R			Active	TSSOP;8 pin;20.3 mm² Outline Drawing:21-0175 (PDF) Land Pattern: 90-0248 (PDF) Use pkgcode/variation: H8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2782E-C3+T&R			Active	TSSOP;8 pin;20.3 mm² Outline Drawing:21-0175 (PDF) Land Pattern: 90-0248 (PDF) Use pkgcode/variation: H8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2782G+			Active	TDFN;10 pin;11.3 mm² Outline Drawing:21-0268 (PDF) Land Pattern: 90-0247 (PDF) Use pkgcode/variation: T1034N+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2782G+T&R			Active	TDFN;10 pin;11.3 mm² Outline Drawing:21-0268 (PDF) Land Pattern: 90-0247 (PDF) Use pkgcode/variation: T1034N+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2782G-5+T&R			Active	TDFN;10 pin;11.3 mm² Outline Drawing:21-0268 (PDF) Land Pattern: 90-0247 (PDF) Use pkgcode/variation: T1034N+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

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Evaluation Kits

DS2782EVKIT

Evaluation Kit for the DS2782

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