Overview
The L9780AC1TR, produced by STMicroelectronics, is an integrated circuit designed to interface with a variety of wide range air fuel sensors. This device is specifically engineered to manage the oxygen pump of these sensors, ensuring precise control and measurement. The L9780AC1TR is part of the SMARTPOWER family and is known for its robust features and compatibility with most air fuel sensors on the market.
Key Specifications
| Parameter | Description |
|---|---|
| Package | 48-pin LQFP |
| Technology | BCD5s_70 V |
| Voltage Controlled Current Source (VCCS) | Selectable voltage clamp, offset compensation, diagnostic (short to battery), and 2 output channels |
| Impedance Measurement | Reference cell impedance measurement |
| Analog to Digital Converter (ADC) | 10-bit multiplexed ADC |
| Scaling Amplifier | With sample & hold and offset compensation |
| Control Voltage Amplifier | With sample & hold and offset compensation |
| SPI Interface | Synchronous or asynchronous functionality, fault detection |
| Heater FET Driver | With diagnostic (short to battery, short to ground, open circuit) |
| Internal Oscillator | 4 MHz internal oscillator |
| Power Supply Compatibility | Digital input and outputs compatible with 5 V or 3.3 V voltage supply |
| Internal Supply | -5 V internal supply |
Key Features
- Voltage Controlled Current Source (VCCS): Features selectable voltage clamp, offset compensation, and diagnostic capabilities.
- Impedance Measurement: Capable of measuring the impedance of the reference cell.
- Analog to Digital Conversion: Includes a 10-bit multiplexed ADC.
- Scaling and Control Voltage Amplifiers: Both with sample & hold and offset compensation.
- SPI Interface: Supports synchronous or asynchronous functionality with fault detection.
- Heater FET Driver: Includes diagnostic features for short to battery, short to ground, and open circuit conditions.
- Pin Protection and Diagnostic: Provides protection against shorts and offers diagnostic capabilities via SPI.
- Internal Oscillator and Supply: Features a 4 MHz internal oscillator and a -5 V internal supply.
Applications
The L9780AC1TR is primarily used in automotive and industrial applications where precise control and measurement of air fuel sensors are critical. It is suitable for:
- Automotive Systems: For managing wide range air fuel sensors in vehicle engines.
- Industrial Sensor Applications: Supports the IO-Link standard, making it suitable for various industrial sensor applications.
Q & A
- What is the primary function of the L9780AC1TR?
The primary function of the L9780AC1TR is to interface with and manage the oxygen pump of wide range air fuel sensors.
- What type of package does the L9780AC1TR come in?
The L9780AC1TR comes in a 48-pin LQFP package.
- What is the technology used in the L9780AC1TR?
The technology used is BCD5s_70 V.
- Does the L9780AC1TR have diagnostic capabilities?
Yes, it includes diagnostic features such as short to battery, short to ground, and open circuit detection.
- What is the resolution of the ADC in the L9780AC1TR?
The ADC is a 10-bit multiplexed ADC.
- Is the L9780AC1TR compatible with different voltage supplies?
Yes, it is compatible with 5 V or 3.3 V voltage supplies.
- Does the L9780AC1TR have an internal oscillator?
Yes, it features a 4 MHz internal oscillator.
- What is the purpose of the heater FET driver in the L9780AC1TR?
The heater FET driver is used to control the sensor heater and includes diagnostic features.
- Can the L9780AC1TR be used in industrial applications?
Yes, it is suitable for industrial sensor applications, including those that support the IO-Link standard.
- How does the L9780AC1TR protect against shorts?
The device provides protection against shorts and offers diagnostic capabilities via SPI.
