DS2741 Maxim Integrated Products, DS2741 Datasheet
DS2741
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DS2741 Summary of contents
Page 1
... The DS2741 current monitor/accumulator is a complete current-sensing, measuring, and accumulation device tailored for cost-sensitive, battery-powered applications in a small 3mm x 3mm TDFN package result, the DS2741 is a key component in battery-charge control and remaining capacity-estimation applications. 2 Through its I C interface, the DS2741 gives the host system access to current measurement and accumula- tion registers ...
Page 2
Current Monitor and Accumulator with Integrated Sense Resistor ABSOLUTE MAXIMUM RATINGS Voltage Range on V Relative to GND ...............-0.5V to +6.0V CC Voltage Range on SDA, SCL, RS+, RS-, SLP Relative to GND.....-0. Continuous Internal Sense Resistor Current ...
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Current Monitor and Accumulator with TEMPERATURE SENSOR CHARACTERISTICS (V = +2.5V to +4.5V -20°C to +70°C, unless otherwise noted PARAMETER SYMBOL Temperature Error AC ELECTRICAL CHARACTERISTICS: I (2.5V ≤ V ≤ 4.5V -20°C to ...
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Current Monitor and Accumulator with Integrated Sense Resistor (V = +2.5V to +4.5V -20°C to +70°C, unless otherwise noted SUPPLY CURRENT vs. SUPPLY VOLTAGE 70 SLP = SDA = SCL = +25°C ...
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... DNC Do Not Connect 9 GND Ground Sleep Input (Active Low). When taken low, the DS2741 is placed in a low-power sleep state where 10 all internal circuitry including the I resets the device and the I Sense Resistor Low Side. Connection to low side of internal 38m 11–14 RS- must be connected together. — ...
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... The current accumu- lator is a read/write register that can be altered by the host system as needed. The Current Accumulator regis- ter is not reset when the DS2741 is in sleep mode. The on-board temperature sensor measures tempera- tures from +127°C to -128°C. The LSb of register 14h has a 1° ...
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... Current Monitor and Accumulator with The DS2741 has 2-byte registers for current measure- ment and accumulation. When the MSB of a 2-byte reg- ister is read, both the MSB and LSB are latched and held for the duration of the read data command to pre- vent updates during the read and ensure synchroniza- tion between the two register bytes ...
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... By writing the correct slave address with R the master indicates it will write data to the slave the master reads data from the slave incorrect slave address is written, the DS2741 assumes the master is communicating with another 8 _______________________________________________________________________________________ ...
Page 9
... Use high-quality, ceramic, surface-mount capacitors, and mount the capacitors as close as possible to the V GND pins to minimize lead inductance. SDA is an open-collector output on the DS2741 that requires a pullup resistor to realize high logic levels. A master using either an open-collector output with a pullup resistor or a push-pull output driver can be used for SCL ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...