LTC2942IDCB-1#TRMPBF

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1. Description

The LTC®2942-1 measures battery charge state, battery voltage and chip temperature in handheld PC and portable product applications. Its operating range is perfectly suited for single cell Li-Ion batteries. A precision coulomb counter integrates current through an internal sense resistor between the battery’s positive terminal and the load or charger. Battery voltage and on-chip temperature are measured with an internal 14-bit No Latency ∆Σ™ ADC. The three measured quantities (charge, voltage and temperature) are stored in internal registers accessible via the onboard SMBus/I2C interface. The LTC2942-1 features programmable high and low thresholds for all three measured quantities. If a programmed threshold is exceeded, the device communicates an alert using either the SMBus alert protocol or by setting a flag in the internal status register.

2. Features

    1. Indicates Accumulated Battery Charge and Discharge

    2. SMBus/I2C Interface

    2. Integrated 50mΩ High Side Sense Resistor

    3. ±1A Sense Current Range

    4. High Accuracy Analog Integration

    5. ADC Measures Battery Voltage and Temperature

    6. Integrated Temperature Sensor

    7. 1% Voltage and Charge Accuracy

    8. Configurable Alert Output/Charge Complete Input

    9. 2.7V to 5.5V Operating Range

  10. Quiescent Current Less than 100µA

  11. Small 6-Pin 2mm × 3mm DFN package

3. Applications

    1. Low Power Handheld Products

    2. Cellular Phones

    3. MP3 Players

    4. Cameras

    5. GPS

4. Pin Configuration

5. Electrical Characteristics

6. package instruction