LTC2941CMS8E#PBF Analog Devices

LTC2941 2 Battery Gas Gauge with I C Interface FEATURES DESCRIPTION n Indicates Accumulated Battery Charge The LTC 2941 measures battery charge state in battery- andDischarge supplied handheld PC and portable product applications. n High Accuracy Analog Integration Its operating range is perfectly suited for single-cell Li-Ion n High Side Sense batteries. A precision coulomb counter integrates current n 1% Charge Accuracy through a sense resistor between the batterys positive n 50mV Sense Voltage Range terminal and the load or charger. The measured charge 2 2 n SMBus/I C Interface is stored in internal registers. An SMBus/I C interface n Configurable Alert Output/Charge Complete Input accesses and configures the device. n 2.7V to 5.5V Operating Range The LTC2941 features programmable high and low n Quiescent Current Less Than 100A thresholds for accumulated charge. If a threshold is n Small 6-Pin 2mm 3mm DFN and 8-Lead exceeded, the device communicates an alert using either MSOPPackages the SMBus alert protocol or by setting a flag in the inter- nal status register. APPLICATIONS The LTC2941 requires only a single low value external n sense resistor to set the current range. Low Power Handheld Products n Cellular Phones All registered trademarks and trademarks are the property of their respective owners. n MP3 Player n Cameras n GPS TYPICAL APPLICATION Total Charge Error vs Differential Sense Voltage CHARGER 2.0 LOAD V + = 3.6V SENSE 0.1F + SENSE 1.5 LTC2941 R SENSE 1.0 AL/CC 100m 2 I C/SMBus SDA SENSE TO HOST 0.5 SCL + 1-CELL GND 0 Li-Ion 2941 TA01a 0.5 1.0 1.5 2.0 0.1 1 10 100 V (mV) SENSE 2941 TA01b Rev. C 1 Document Feedback For more information www.analog.com CHARGE ERROR (%)LTC2941 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) + Supply Voltage (SENSE ) ............................. 0.3V to 6V Operating Ambient Temperature Range SCL, SDA, AL/CC ......................................... 0.3V to 6V LTC2941C ................................................ 0C to 70C + SENSE ..................................0.3V to (V + 0.3V) LTC2941I..............................................40C to 85C SENSE Storage Temperature Range .................... 65C to 150 PIN CONFIGURATION TOP VIEW TOP VIEW + SENSE 1 6 SENSE + SENSE 1 8 SENSE GND 7 5 AL/CC 2 GND 2 7 AL/CC 9 6 SDA SCL 3 SCL 4 SDA 3 DNC 4 5 DNC MSE PACKAGE DCB PACKAGE 8-LEAD PLASTIC MSOP 6-LEAD (2mm 3mm) PLASTIC DFN PIN 4, PIN 5 AND EXPOSED PAD (PIN 9), DO NOT CONNECT T = 150C, = 120C/W JMAX JA EXPOSED PAD (PIN 7), DO NOT CONNECT ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2941CDCB TRMPBF LTC2941CDCB TRPBF LFKQ 6-Lead (2mm 3mm) Plastic DFN 0C to 70C LTC2941IDCB TRMPBF LTC2941IDCB TRPBF LFKQ 6-Lead (2mm 3mm) Plastic DFN 40C to 85C TUBE TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2941CMS8E PBF LTC2941CMS8E TRPBF LTGVY 8-Lead Plastic MSOP 0C to 70C LTC2941IMS8E PBF LTC2941IMS8E TRPBF LTGVY 8-Lead Plastic MSOP 40C to 85C TRM = 500 pieces. Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Rev. C 2 For more information www.analog.com