Features and Benefits
- Measures Accumulated Battery Charge and Discharge
- 3.6V to 20V Operating Range for Multiple Cells
- Integrated 50mΩ High Side Sense Resistor
- ±1A Current Sense Range
- 14-Bit ADC Measures Voltage, Current and Temperature
- 1% Voltage, Current and Charge Accuracy
- High Side Sense
- General Purpose Measurements for Any Battery Chemistry and Capacity
- I2C/SMBus Interface
- Configurable Alert Output/Charge Complete Input
- Quiescent Current Less Than 120μA
- Small 8-Lead 3mm × 3mm DFN Package
The LTC2943-1 measures battery charge state, battery voltage, battery current and its own temperature in portable product applications. The wide input voltage range allows use with multicell batteries up to 20V. A precision coulomb counter integrates current through a sense resistor between the battery’s positive terminal and the load or charger. Voltage, current and temperature are measured with an internal 14-bit No Latency ΔΣ™ ADC. The measurements are stored in internal registers accessible via the onboard I2C/SMBus Interface.
The LTC2943-1 features programmable high and low thresholds for all four 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.
- Power Tools
- Portable Medical Equipment
- Video Cameras
Product Lifecycle Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
Demonstration circuit 1812A-C features the LTC2943-1. The LTC2943-1 has an operating range of 3.6V to 20V making it perfectly suited for multicell battery applications. A precision analog coulomb counter integrates current measured through the internal sense resistor. The LTC2943-1 measures voltage, current and temperature with an internal 14-bit No Latency ΔΣ™ ADC. The measurements are stored in internal registers accessible via the onboard SMBus/I2C interface.
Documentation & Resources
R567 Reliability Data3/23/2018
DC1812A - Demo Manual12/8/2015
Tools & Simulations
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LTC2943-1 Companion Parts
Recommended Related Parts
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.