LTC2943IDD-1

The LTC2943IDD-1 is Analog Devices’ (Linear Technology) single‑cell Li‑ion/Li‑polymer battery monitor (fuel gauge) with coulomb counting. It continuously measures battery voltage, charge/discharge current (via a sense resistor), and temperature, and uses coulomb counting to estimate remaining capacity and state of charge (SOC). It provides an I2C-compatible digital interface for reading measurements, status, and for configuring alarms and thresholds. Features typically include programmable full/empty thresholds, interrupt outputs, and low quiescent current with optional sleep/wake modes, making it suitable for portable, battery-powered devices. The -IDD-1 suffix indicates a specific package variant/temperature grade of the device. Applications include mobile devices, wearables, and other single‑cell systems that need on‑board SOC estimation, protection, and battery monitoring.

Key features of LTC2943IDD-1:
- Single-cell Li-Ion/Li-Polymer battery gauge with coulomb counter
- Ah accumulator for remaining capacity and charge tracking
- I2C-compatible digital interface for config and data readout
- Real-time sensing of cell voltage, current (via sense resistor), and temperature
- Temperature-compensated state-of-charge estimation
- Programmable data update rate and averaging to reduce noise
- Alerts/interrupts for fault and state conditions (low/high voltage, over/under temperature, etc.)
- Low quiescent current and efficient power-saving modes
- Small package suitable for portable applications
Note: For exact specifications (voltage range, resolution, register map), refer to the LTC2943IDD-1 datasheet.

- Pin count: 8 pins (an 8‑lead package).
- Function: LTC2943IDD-1 is a single‑cell Li‑ion battery gauge. It provides coulomb counting (current via RSENSE), voltage measurement, and battery status with an I2C interface for reporting state of charge and other battery metrics.

- Manufacturer: Analog Devices, Inc. (ADI). The LTC2943 was originally from Linear Technology; ADI now owns the LTC product line.
- What kind of company: An American multinational semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits (e.g., power management, data converters, amplifiers, sensors). ADI acquired Linear Technology in 2017.

Application areas of LTC2943IDD-1:
- Single-cell Li-ion/Li‑polymer battery fuel gauge
- Portable consumer electronics (phones, cameras, wearables, handheld devices)
- Cordless tools and other battery-powered equipment
- IoT/remote sensors and data loggers
- Industrial equipment and backup power systems
- Energy-management systems requiring coulomb counting, voltage and temperature monitoring via I2C

LTC2943IDD-1 comes in an 8-pin MSOP package (MSOP-8).