LTC2944IDD#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power and Energy Monitor

Characteristics: - Measures current, voltage, power, charge, and energy - High accuracy and resolution - Wide operating temperature range - Low power consumption - Small form factor

Package: 12-Lead DFN (3mm x 4mm)

Essence: The LTC2944IDD#PBF is a versatile power and energy monitor IC that accurately measures various electrical parameters in a compact package.

Packaging/Quantity: Available in tape and reel packaging with 250 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Current Measurement Range: ±30A
• Voltage Measurement Range: 0V to 60V
• Power Calculation Range: ±90W
• Charge Measurement Range: ±65mAh
• Energy Measurement Range: ±65mWh
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LTC2944IDD#PBF features a 12-lead DFN package with the following pin configuration:

1. VIN+ (Positive Supply Voltage Input)
2. VIN- (Negative Supply Voltage Input)
3. VOUT (Voltage Output)
4. SDA (I2C Serial Data Input/Output)
5. SCL (I2C Serial Clock Input)
6. ALERT (Alert Output)
7. GND (Ground)
8. VCC (Supply Voltage Output)
9. ISENSE+ (Positive Current Sense Input)
10. ISENSE- (Negative Current Sense Input)
11. VBAT (Battery Voltage Sense Input)
12. TEMP (Temperature Sense Input)

Functional Features

• Accurate measurement of current, voltage, power, charge, and energy
• I2C interface for easy communication with microcontrollers
• Programmable alert thresholds for various parameters
• Integrated temperature sensor for monitoring device temperature
• Automatic shutdown mode to conserve power when not in use

Advantages and Disadvantages

Advantages: - High accuracy and resolution for precise measurements - Wide operating temperature range allows usage in various environments - Low power consumption extends battery life - Compact form factor enables integration into space-constrained applications

Disadvantages: - Limited current measurement range of ±30A may not be suitable for high-power applications - Requires external components for voltage and current sensing

Working Principles

The LTC2944IDD#PBF operates by measuring the voltage across a shunt resistor connected in series with the load. By sampling this voltage and the battery voltage, it calculates the current, power, charge, and energy values using internal algorithms. The I2C interface allows the user to read these values and configure the device.

Detailed Application Field Plans

The LTC2944IDD#PBF finds applications in various fields, including:

1. Battery-powered devices: Enables accurate monitoring of power consumption and remaining battery capacity.
2. Energy harvesting systems: Measures energy generated from renewable sources such as solar panels or wind turbines.
3. Power management systems: Provides real-time data on power usage for efficient energy management.
4. Industrial equipment: Monitors power consumption in machinery and helps optimize energy usage.
5. Electric vehicles: Tracks energy consumption and charging/discharging efficiency.

Detailed and Complete Alternative Models

1. LTC2943IDD#PBF: Similar to LTC2944IDD#PBF but with a lower current measurement range of ±10A.
2. INA219IDR: A different IC with similar functionality, but with a different package and pin configuration.

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