AC7801-TEMP
AEC-Q100 qualified temperature sensor interface with high accuracy and fast response for automotive thermal monitoring
Product Overview
Description
The AC7801-TEMP is an automotive-qualified temperature sensor interface designed for precise thermal monitoring in vehicle applications.
With support for RTD, thermistor, and thermocouple sensors, 16-bit ADC, and -40°C to +150°C measurement range, it is ideal for engine and battery temperature monitoring.
The device includes sensor fault detection, linearization, and LIN interface for automotive network integration.
Product Series
AC
Primary Application
Engine temperature monitoring
Key Features
- Multi-sensor type support (RTD, thermistor, thermocouple)
- 16-bit high-resolution ADC
- ±0.5°C accuracy over temperature range
- Integrated sensor excitation
- Sensor fault detection (open/short)
- Digital linearization and compensation
- LIN 2.1 interface for automotive networks
- AEC-Q100 Grade 1 qualified
Specifications
| Supply Voltage | 3.3V to 5V |
|---|---|
| ADC Resolution | 16-bit |
| Sensor Types | RTD, Thermistor, Thermocouple |
| Temperature Range | -40°C to +150°C |
| Accuracy | ±0.5°C |
| Interface | LIN 2.1 / Analog output |
Applications
Engine temperature monitoring
Electronic system design
Battery temperature sensing
Battery and charging management
HVAC temperature control
Industrial automation and control
Transmission temperature monitoring
Electronic system design
Thermal management systems
Electronic system design
FAE Expert Insights
"The AC7801-TEMP is an excellent solution for automotive temperature monitoring applications. The multi-sensor support provides flexibility for different temperature sensing requirements. I have successfully used this interface in engine management and battery monitoring systems where accurate temperature measurement is critical. The 16-bit ADC provides sufficient resolution for precise thermal monitoring. The integrated linearization eliminates the need for external lookup tables or complex calculations. The sensor fault detection provides early warning of sensor failures, improving system reliability. For automotive temperature sensing applications, this interface offers excellent accuracy and integration."
High-accuracy temperature sensor interface with multi-sensor support for automotive thermal monitoring
— Dr. Michael Chen, BeiLuo
Frequently Asked Questions
What temperature sensor types are supported?
The AC7801-TEMP supports RTD sensors like PT100/PT1000 for high accuracy, NTC/PTC thermistors for cost-sensitive applications, and thermocouples for high-temperature measurement. The interface provides appropriate excitation and signal conditioning for each sensor type.
Select RTD for highest accuracy, thermistor for cost-sensitive, thermocouple for high temperatures.
What is the accuracy of temperature measurement?
The AC7801-TEMP achieves ±0.5°C accuracy over the -40°C to +150°C automotive temperature range. The 16-bit ADC provides high resolution for precise temperature measurement. Accuracy includes linearization and cold junction compensation for thermocouples.
±0.5°C accuracy meets most automotive temperature monitoring requirements.
How does sensor fault detection work?
Sensor fault detection identifies open-circuit and short-circuit conditions in the sensor connection. The interface monitors sensor excitation current and voltage to detect faults. Fault conditions are reported via LIN interface. This enables early detection of sensor failures.
Fault detection provides early warning of sensor failures for system reliability.
Can AC7801-TEMP interface with multiple sensors?
Yes, the AC7801-TEMP supports multiple sensor inputs with multiplexing. Up to 4 sensors can be connected and measured sequentially. This enables multi-point temperature monitoring with a single interface IC. Each sensor channel is individually configurable.
Multi-sensor support enables distributed temperature monitoring.
What is LIN interface used for?
The LIN 2.1 interface provides low-cost automotive network connectivity. LIN is widely used for body electronics and sensor networks in vehicles. The interface supports baud rates up to 20kbps. LIN enables integration with existing vehicle networks.
LIN interface provides cost-effective automotive network integration.