Semihouse Electronics Agency Brand - Shensiling Launches a New Generation of Digital High Precision, Ultra Low Power Consumption, and Wide Voltage Temperature and Humidity Sensor Chip Product - CHT8315


Release time:

2021-09-06

Recently, Sensylink has launched a new generation of high-precision digital temperature and humidity sensor chip product CHT8315 on the basis of the previous generation of products. 0.02%RH, the accuracy is ±5.0%RH. It can cover applications with a wide voltage range of 1.35V - 5.5V. When collecting temperature and humidity data once per second under 3.3V power supply, the average operating current is only 1.0uA (Typ.); in standby mode, the current

Semihouse Electronics  Agency Brand - Shensiling Launches a New Generation of Digital High Precision, Ultra Low Power Consumption, and Wide Voltage Temperature and Humidity Sensor Chip Product - CHT8315

background introduction

Recently, Sensylink has launched a new generation of high-precision digital temperature and humidity sensor chip product CHT8315 on the basis of the previous generation of products. 0.02%RH, the accuracy is ±5.0%RH. It can cover applications with a wide voltage range of 1.35V - 5.5V. When collecting temperature and humidity data once per second under 3.3V power supply, the average operating current is only 1.0uA (Typ.); in standby mode, the current consumption is 35nA (Typ. .). On the digital interface, it is compatible with the I 2 C/SMBus protocol, supports the PEC function, improves the robustness and reliability of the communication with the host, and supports the time-out function at the same time, and supports the fastest speed up to 3.4MHz (HSM, high-speed mode ), supports up to 4 slave address settings, which further improves the adaptability and flexibility to complex systems. In terms of chip function, the upper and lower limit alarm values ​​of temperature and humidity can be flexibly set to provide system wake-up without continuous monitoring by the microcontroller. With an alarm acceleration detection function, it is suitable for ultra-low power consumption systems powered by batteries.

 

01Product Introduction

CHT8315 provides a unique FAST function (set Focus bit = 1), in this mode, the sensor chip actively and continuously collects temperature and humidity with ultra-low power consumption (collected once every 120s), allowing the MCU to enter deep sleep, and with the preset temperature and humidity High/low thresholds (T HIGH,  T LOW H HIGH,  H LOW , ) are compared in real time. Once the threshold is exceeded/lower, the sensor chip automatically enters the high-speed continuous measurement mode and wakes up the MCU through the ALERT PIN.

The CHT8315 ensures an error of less than ±0.5 ° C in the temperature range of 0~100 ° C, less than ±1 ° C in the temperature range of -40 ~ 125 ° C, and less than ±5.0%RH in the humidity range of 20 ~ 80%RH. Ultra-low working current, with alarm sensitivity adjustable temperature and humidity comparison function, with flexible temperature and humidity threshold logic, making it very suitable for environmental monitoring. The 3.0mmx3.0mmx1.0mm small size, and ultra-low power consumption, can be widely used in household appliances, smart home devices, intelligent constant temperature and humidity meters, HVAC systems and inkjet printers and other fields.

 

CHT8315实物解剖图

 CHT8315的典型应用

Shutdown Current vs Vcc

 Average Current vs Vcc

Temperature Error vs. Ambient Temperature

Humidity Error vs AmbientHumidity

Temperature Error vs.Vcc(RH=50%)

 

 

Humidity Error vs Vcc(T=25℃)

 

02 Product Features

Operating voltage range: 1.35V-5.5V

Average operating current (one conversion per second) 1.0uA(Typ.)@3.3V

Shutdown current: 35nA(Typ.)

Temperature and humidity accuracy:

  • ±0.5℃(Max.) from 0℃to 100℃

    ±1.0℃(Max.) from -40℃to 125℃

    ±5.0%RH(Max.) from 20%RHto 80%RH

  • Temperature resolution: 14 bit ADC, 0.03125℃

    Humidity resolution: 16 bit ADC, 0.02%RH

    Interface protocols compatible with I2C/SMBus:

    Support PEC function, increase the robustness and reliability of communication

    Support time-out function to prevent communication exception

    Speeds up to 3.4MHz are supported

    A maximum of four secondary address Settings are supported

    Programmable setting of high and low temperature and humidity thresholds

    Measuring range: -40℃~125℃, 0%RH ~100%RH

  • Package form: DFN3x3-6 (3.0*3.0*1.0mm 3 )

 

03 Interpretation of advantages

◇Accuracy

  • Without calibration, the CHT8315 specification supports a temperature accuracy of ±0.5°C from 0 to 100°C.

  • Within the power supply voltage range of 1.35~5.5V, the temperature change is less than 0.04℃/V, and the humidity change is less than 0.5%RH/V.

◇ALERT function

  •  ALERT real-time active monitoring and wake-up function, alarm acceleration detection function.

◇Technical support

  • Provide Southern District (Shenzhen) FAE technical support.

  • Provide North District (Beijing) FAE technical support.

  • Provide original (Shanghai) FAE, AE technical support.

 

04 Product application

The figure below shows the test demo and related data of CHT8315.

 

 

【About Sensylink

 

Shanghai Sensylink Microelectronics Technology Co., Ltd. (Sensylink)

Temperature|Temperature and Humidity Sensor-Shanghai Sensylink Microelectronics Technology Co., Ltd. (www.sensylink.com) Sensylink Microelectronics is a supplier of environmental sensor chips and analog & mixed signal chips, which designs, develops, manufactures and sells Including temperature sensor chip, temperature and humidity sensor chip. Shen Siling is committed to combining innovative sensor technology with mature integrated circuit process technology to design sensor chip products with high integration, high precision, small size, and low power consumption. Based in China and serving the world, Shensiling provides customers with more cost-effective products and services.