Silicon Labs introduced a new family of high-precision temperature sensors offering industry-leading power efficiency. Silicon Labs’ ultra-low-power Si705x temperature sensors consume only 195 nA (typical average current) when sampled once per second, which minimizes self-heating and enables multi-year coin cell battery operation. Unlike traditional digital temperature sensors, the Si705x devices maintain their accuracy across the full operating temperature and voltage ranges and offer four accuracy levels up to +/-0.3 °C. The sensors are ideal for HVAC, white goods, computer equipment, asset tracking, cold chain storage, industrial control and medical equipment. AEC-Q100-qualified versions are also available for automotive applications.
Traditional approaches to temperature sensing that use thermistors or embedded MCU temperature sensors suffer from poor accuracy and higher power consumption. Although improved accuracy can be achieved through end-of-line calibration, this technique presents additional manufacturing costs and challenges while accuracy is still susceptible to variations in power supply voltage. In contrast, the Si705x sensors’ patented signal processing technology provides stable temperature accuracy over the entire operating voltage and temperature ranges without the need for costly end-of-line production calibration. In addition, the integrated low-power analog design delivers an optimal price/performance solution with up to 35 times better power efficiency than competing temperature sensor products.
New Vishay Intertechnology IHLP® Inductors in 2020 Case Size Offer High-Temperature Operation to +155 °C - [Link]
The HDC1008 is a digital humidity sensor with integrated temperature sensor that provides excellent measurement accuracy at very low power. The device measures humidity based on a novel capacitive sensor. The humidity and temperature sensors are factory calibrated. The innovative WLCSP (Wafer Level Chip Scale Package) simplifies board design with the use of an ultra-compact package. The sensing element of the HDC1008 is placed on the bottom part of the device, which makes the HDC1008 more robust against dirt, dust, and other environmental contaminants. The HDC1008 is functional within the full –40°C to +125°C
HDC1008 – Integrated Low Power Digital Humidity Sensor with Integrated Temperature Sensor - [Link]
by Susan Nordyk @ edn.com:
Based on 1.1-µm pixel technology, the AR1335 CMOS image sensor from ON Semiconductor provides 18% better sensitivity than previous-generation devices, along with increased quantum efficiency and linear well capacity to enable near-digital still-camera quality and low-light imaging on smart-phone cameras. The sensor’s pixel and color filter processing increase sensitivity, allowing more light to be captured to improve image quality, especially in low light.
The AR1335 offers crisp 13-Mpixel resolution with high-quality zoom and sharp reproduction of scene details. Professional video quality is supported through 4K ultra-high definition and cinema formats at 30 fps and full HD 1080P at 60 fps. On-chip camera functions include windowing, mirroring, column and row skip modes, and snapshot mode. In addition, a 32° chief ray angle makes the sensor suitable for low z-height applications.
The AR1335 is now in mass production in die format. It has been designed into several smart phone models, with availability in leading phones expected by the second quarter of 2015.
Sensor enables low-light imaging for smart-phone cameras - [Link]
Vishay Intertechnology is broadening its optoelectronics portfolio with the introduction of two new automotive-grade high-speed silicon PIN photodiodes in top-view, surface-mount packages measuring 5 mm by 4 mm by 0.9 mm. Offering a large sensitive area of 7.5 mm2, the Vishay Semiconductors VEMD5010X01 and VEMD5110X01 provide high radiant sensitivity with a reverse light current of 48 µA and a very low dark current of 2 nA for automotive, industrial, and medical applications.
The AEC-Q101-qualified devices are manufactured using Vishay’s new foil assisted mold (FAM) technology. The photodiodes’ leadframe, bond wire, and connection pads are molded in a black epoxy, while a free cavity above the radiant sensitive area allows light to enter the package for signal generation. This design enables a smaller overall package size with a lower height profile, while maintaining a large radiant sensitive area. In addition, thermal stress on the bond is reduced for increased robustness and reliability.
Vishay Intertechnology Automotive-Grade PIN Photodiodes Deliver 7.5 mm² Sensitive Area in Low-Profile Packages - [Link]
Scientists have created a new generation of biosensors that could potentially allow machines to sniff out subtle differences in smell with more accuracy than our own human noses. From University of Manchester:
Every odour has its own specific pattern which our noses are able to identify. Using a combination of proteins coupled to transistors, for the first time machines are able to differentiate smells that are mirror images of each other, so called chiral molecules, something that has not been possible before. The human nose can distinguish between some of these molecules and the different forms of the same molecule of carvone, for example, can smell either like spearmint or caraway. Previous machines would not have been able to distinguish between the two.
The development will allow the creation of a new generation of biosensors with an acute ability to sniff out problems. These could have many industrial uses such as telling when food has gone off, and they could even be accurate enough to smell how much pollution is in the atmosphere.
A collaboration of academics from The University of Manchester and the University of Bari in Italy, have created a biosensor that utilises an odorant binding protein. The team’s findings are published today in the journal Nature Communications.
New Sensors Could Allow Machines to Smell More Accurately Than Humans - [Link]
praveen @ circuitstoday.com:
This article is about interfacing pressure sensor to arduino. The pressure sensor used here is SPD005G from Smartec . SPD (Smart Pressure Device) is a series of silicon based pressure sensors suitable for industrial as well as house hold applications. These sensors are generally available in plastic inline or dual inline packaging. SPD sensors are generally available in two operation modes namely gauge type and absolute type. In gauge type the pressure is measured with respect to the atmospheric pressure. There is a small vent on the package for getting contact with the atmosphere. In absolute type, the pressure is measured with respect to vacuum. A small vacuum chamber is incorporated into the package during fabrication. Typical applications of SPD005G are medical systems, BP monitoring, air conditioning systems, process control, hand held pressure sensors etc.
Interfacing pressure sensor to arduino - [Link]
by Steve Taranovich @ edn.com:
The BME680 from Bosch Sensortec is the world’s first environmental sensor combining pressure, humidity, temperature, and indoor air quality in a single 3×3mm2 package.
The new IC enables mobile devices and wearables to monitor indoor air quality measurement in a low power, small footprint package. The level of integration is what makes this solution so attractive as well as Bosch’s capabilities with software algorithms for a full solution.
The IC will enable multiple new capabilities for portable and mobile devices such as air quality measurement, personalized weather stations, indoor navigation, fitness monitoring, home automation, and other applications for the Internet of Things (IoT).
Combo MEMS sensor solution with integrated gas sensor - [Link]
by Jason Poel Smith @ makezine.com:
When working in extreme temperatures it is important to monitor your body temperature. In freezing weather, your fingers and toes get numb and you can develop frostbite without even noticing it. Likewise, if your core body temperature drops too low, you can start to start to suffer the effects of hypothermia before you are aware of it.
So I designed an automatic temperature sensor that will monitor the temperature of your fingers, your toes, and your torso, as well as the outside temperature. This can help you to stay safe when working in extreme cold.
Wearable Temperature Sensors For Working in Extreme Cold - [Link]
Chas over at PNW/Electronics writes:
I came across a stash of iButton T-sense 1-wire sensors.. so I grabbed a couple and decided to check out 1-wire.
Maxim makes a 1-wire device called the DS18B20. It’s a 9-12 bit temperature sensor with the possibility of being powered by parasitic power from the data line. This cuts the signal path down to a single DQ line and a return. A company called iButtonLink produces a nice little wrapper around this device called a T-Sense. There are a couple pieces of software out there that will allow you to hook these up to monitoring systems, I don’t have any though. These devices come with a 64-bit address code and can be daisy-chained which makes having many of these devices monitored very nice.
iButtonLink T-Sense 1-wire sensor (Maxim DS18B20) + PIC 18F14K22 - [Link]
“Raz” over embedded-lab.com has written a tutorial on how to interface BMP180 temperature and barometric pressure sensor with Arduino UNO board. The BMP180 is a new generation sensor coming on a LGA package and it’s able to measure pressure in the range of 300 to 1100hPa using low power and achieving low noise measurements. The interface is a standard I2C and sensor is fully factory calibrated. The voltage required to power the IC is 3.3V, so your Arduino must provide 3.3V. On this tutorial the data is displayed on a 1.44″ TFT display and “Raz” moved a step further calculating the altitude from the derived pressure. Code and libraries are supplied on the link below.
Interfacing BMP180 temperature and pressure sensor on Arduino UNO - [Link]