19-4635 5/09 DS2782 Stand-Alone Fuel Gauge IC www.maxim-ic.com GENERAL DESCRIPTION PIN CONFIGURATIONS 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 FEATURES Handheld PC Data Terminals Precision Voltage, Temperature, and Current 3G Multimedia Wireless Handsets Measurement System Accurate Stable Internal Time Base TYPICAL OPERATING CIRCUIT 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. 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. 1 of 28 DS2782 ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to V -0.3V to +6.0V SS Voltage Range on V Relative to V -0.3V to (V + 0.3V) IN SS DD Operating Temperature Range -40C to +85C Storage Temperature Range -55C to +125C 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 (V = 2.5V to 4.5V T = -20C to +70C, unless otherwise noted. Typical values are at T = +25C.) DD A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 1) +2.5 +4.5 V DD 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 (V = 2.5V to 4.5V T = -20C to +70C, unless otherwise noted. Typical values are at T = +25C.) DD A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 2.5V V 4.2V 65 95 DD ACTIVE Current I A ACTIVE 105 SLEEP Mode Current I 2.5V V 4.2V 1 3 A SLEEP DD Input Logic-High: V (Note 1) 1.5 V IH SDA, SCL, PIO Input Logic-Low: V (Note 1) 0.6 V IL SDA, SCL, PIO Output Logic-Low: V I = 4mA (Note 1) 0.4 V OL OL SDA, PIO Pulldown Current: V , V , V = SDA SCL PIO I 0.2 A PD SDA, SCL, PIO 0.4V V Input Resistance R 15 M IN IN SDA, SCL < V IL Bus Low to Sleep Time t 2.2 s SLEEP (Note 2) Undervoltage SLEEP V (Note 1) 2.40 2.45 2.50 V SLEEP Threshold ELECTRICAL CHARACTERISTICS: TEMPERATURE, VOLTAGE, CURRENT (V = 2.5V to 4.5V T = -20C to +70C, unless otherwise noted. Typical values are at T = +25C.) CC A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Temperature Resolution T 0.125 C LSB Temperature Error T 3 C ERR Voltage Resolution V 4.88 mV LSB Voltage Full-Scale V 0 4.5 V FS Voltage Error V 50 mV ERR Current Resolution I 1.56 V LSB Current Full-Scale I 51.2 mV FS 2 of 28