Overview
The LTC2944IDD#PBF, produced by Analog Devices Inc., is a sophisticated battery gas gauge integrated circuit designed for precise monitoring of battery charge state, voltage, current, and temperature in portable product applications. This device supports a wide operating voltage range of 3.6V to 60V, making it suitable for use with multicell batteries. It features a high-accuracy coulomb counter, 14-bit ADCs for voltage, current, and temperature measurements, and an I2C/SMBus interface for communication.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Operating Voltage Range | Supply Voltage (SENSE+) | 3.6V to 60V |
| Current Measurement Accuracy | Current Measurement ADC Integral Nonlinearity and Gain Error | 1% Accuracy |
| Sense Voltage Range | ±50mV | ±50mV |
| ADC Resolution | Resolution for Voltage, Current, and Temperature Measurements | 14-bit |
| Interface | Communication Interface | I2C/SMBus |
| Operating Temperature Range | Ambient Temperature Range | –40°C to 85°C (LTC2944IDD) |
| Quiescent Current | Supply Current in Active Mode | |
| Package | Package Type and Size | 8-Lead (3mm × 3mm) Plastic DFN |
Key Features
- Measures battery charge state, voltage, current, and its own temperature.
- Supports a wide operating voltage range of 3.6V to 60V for multicell batteries.
- High-accuracy coulomb counter integrates current through a single low-value sense resistor.
- 14-bit ADCs for precise voltage, current, and temperature measurements.
- I2C/SMBus interface for easy communication and configuration.
- Programmable high and low thresholds for voltage, current, and temperature with alert functionality.
- Low quiescent current of less than 150µA.
- Compact 8-Lead (3mm × 3mm) Plastic DFN package.
Applications
The LTC2944IDD#PBF is designed for use in various portable product applications, including:
- Battery-powered handheld devices.
- Electric vehicles and hybrid electric vehicles.
- Industrial battery management systems.
- Medical devices requiring precise battery monitoring.
- Consumer electronics with multicell battery packs.
Q & A
- What is the operating voltage range of the LTC2944IDD#PBF?
The operating voltage range is 3.6V to 60V, making it suitable for multicell batteries.
- What is the accuracy of the current measurements?
The current measurements have an accuracy of 1%.
- What type of interface does the LTC2944IDD#PBF use for communication?
The device uses an I2C/SMBus interface for communication.
- What is the operating temperature range of the LTC2944IDD#PBF?
The operating temperature range is –40°C to 85°C.
- How does the LTC2944IDD#PBF alert when thresholds are exceeded?
The device communicates an alert using either the SMBus alert protocol or by setting a flag in the internal status register.
- What is the quiescent current of the LTC2944IDD#PBF?
The quiescent current is less than 150µA).
- What type of package does the LTC2944IDD#PBF come in?
The device comes in an 8-Lead (3mm × 3mm) Plastic DFN package).
- Can the LTC2944IDD#PBF be used with different battery chemistries?
Yes, it supports general-purpose measurements for any battery chemistry and capacity).
- How does the LTC2944IDD#PBF measure current?
The device integrates current through a single low-value sense resistor).
- What is the resolution of the ADCs in the LTC2944IDD#PBF?
The ADCs have a resolution of 14 bits).
