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DS2782

Stand-Alone Fuel Gauge IC

1 of 28

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

www.maxim-ic.com

GENERAL 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.

APPLICATIONS

Digital Still Cameras

Sub-Notebook Computers

Handheld PC Data Terminals

3G Multimedia Wireless Handsets

TYPICAL OPERATING CIRCUIT

PIN CONFIGURATIONS

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

ORDERING INFORMATION

PART PIN-PACKAGE TOP MARK

DS2782E+ 8 TSSOP 2782+

DS2782E+T&R 8 TSSOP 2782+

DS2782G+ 10 TDFN-EP* 2782+

DS2782G+T&R 10 TDFN-EP* 2782+

Note: To order devices with the unique 64-bit ID option, contact Maxim sales.

+Denotes a lead(Pb)-free/RoHS-compliant package.

T&R = Tape and reel.

*EP = Exposed pad.

测量电压，温度和电流，

DS2782

2 of 28

ABSOLUTE MAXIMUM RATINGS

Voltage Range on Any Pin Relative to V

-0.3V to +6.0V

Voltage Range on V

Relative to V

-0.3V to (V

+ 0.3V)

Operating Temperature Range

-40°C to +85°C

Storage Temperature Range

-55°C to +125°C

Soldering Temperature

Refer to the IPC/JEDEC J-STD-020 Specification.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,

and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is

not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.

RECOMMENDED DC OPERATING CHARACTERISTICS

= 2.5V to 4.5V; T

= -20°C to +70°C, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

(Note 1) +2.5 +4.5 V

SCL, VIN Voltage Range (Note 1) -0.3 +4.5 V

SDA, PIO Voltage Range (Note 1) -0.3 +5.5 V

DC ELECTRICAL CHARACTERISTICS

= 2.5V to 4.5V; T

= -20°C to +70°C, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

2.5V ≤ V

≤ 4.2V 65 95

ACTIVE Current I

ACTIVE

105

A

SLEEP Mode Current I

SLEEP

2.5V ≤ V

≤ 4.2V 1 3

A

Input Logic-High:

SDA, SCL, PIO

(Note 1) 1.5 V

Input Logic-Low:

SDA, SCL, PIO

(Note 1) 0.6 V

Output Logic-Low:

SDA, PIO

= 4mA (Note 1) 0.4 V

Pulldown Current:

SDA, SCL, PIO

SDA

, V

SCL

, V

PIO

0.4V

0.2

A

Input Resistance R

M

Bus Low to Sleep Time t

SLEEP

SDA, SCL < V

(Note 2)

2.2 s

Undervoltage SLEEP

Threshold

SLEEP

(Note 1) 2.40 2.45 2.50 V

ELECTRICAL CHARACTERISTICS: TEMPERATURE, VOLTAGE, CURRENT

= 2.5V to 4.5V; T

= -20°C to +70°C, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Temperature Resolution T

LSB

0.125 °C

Temperature Error T

ERR

±3 °C

Voltage Resolution V

LSB

4.88 mV

Voltage Full-Scale V

0 4.5 V

Voltage Error V

ERR

±50 mV

Current Resolution I

LSB

1.56

V

Current Full-Scale I

±51.2 mV

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