SNU301 is a interface chip for temperature and pressure sensor. The product is used for sensor specific calibration of capacitive sensor signals and has the advantages of high accuracy and fast response speed. It has passed the AEC-Q100 standard certification. It can use in industrial or consumer environments .And also it is optimized for automotive environments by overvoltage and reverse polarity protection circuitry, excellent electromagnetic compatibility, and multiple diagnostic features.

Core Features

Power - supply and Protection: The power - supply voltage range is 4.5V - 5.5V. It supports ±20V overvoltage and reverse - polarity protection, with an ESD HBM protection level of ±2000V and a Latch - up protection of ±200mA, ensuring reliable operation in complex electrical environments.

Signal - processing Capability: It has two built - in 24 - bit high - resolution ADCs that can accurately collect sensor signals. Additionally, it integrates a high - precision PGA (Programmable Gain Amplifier) and a temperature sensor (either internal or external). Through internal temperature compensation and pressure compensation algorithms, it can directly output calibrated pressure data, ensuring high - precision measurement across the entire temperature range.

Flexible Output and Configuration: It supports multiple output interfaces, including SENT, analog, and I2C, which can meet the communication requirements of different host systems. It is equipped with 256 - byte OTP memory for storing calibration coefficients and configuration parameters, supporting multi - point calibration and simplifying the mass - production process.

Diagnostic Function: It has high and low clamp - setting functions and sensor abnormal - diagnosis functions, which can output analog diagnostic voltages, facilitating system fault detection and maintenance.

Wide Operating Temperature Range: The operating temperature range is - 40°C - 150°C, meeting the AEC - Q100 Grade 0 automotive - grade standard, which ensures long - term stable operation under extreme conditions.

Technical Specifications

Parameter	Specification
Type	Capacitive
Channel	Single channel
Supply voltage	4.5~5.5V
Supply current	3mA
Operating temperature range	-40°C~150°C
Memory	256Bytes (OTP)
Temperature sampling rate (Max)	4.8kHz
Pressure sampling rate (Max)	4.8kHz
ADC resolution	24-bit
Analog output resolution (DAC)	16-bit
Interface	SENT/Analog/I2C
Over-voltage and reverse polarity protection	±20V
ESD HBM	±2000V
Qualifications	AEC-Q100 Grade 0