Temperature-to-voltage converter measures remote diodes with 1 °C accuracy
July 12, 2011 // Paul Buckley
Linear Technology Corporation has introduced a high accuracy temperature-to-voltage converter with built-in series resistance cancellation for 2.5 V to 5.5 V systems. Many low voltage systems today rely on temperature to assess overall system health and reliability. Traditional implementations require a series of filters, a precise reference and a current source, resulting in a complex conversion scheme prone to inaccuracies if not carefully designed. The LTC2997 is a simple temperature monitoring solution that measures a remote diode's temperature with ±1°C accuracy or local temperature with ±1.5°C accuracy, and outputs a voltage proportional to absolute temperature. The LTC2997 provides a precise, space-saving, micropower temperature monitoring solution.
The LTC2997's simplicity, accuracy and micropower consumption caters to a wide variety of applications, including system thermal control, energy harvesting, desktop and notebook computers, network servers and environmental monitoring. Two current sense inputs can be configured to measure either local or remote temperature. A built-in algorithm cancels the errors due to sensor series resistance when measuring a diode or transistor voltages. A 1.8 V voltage reference output is also available to share with an external ADC or for generating temperature threshold voltages to compare against the V PTAT output.
The LTC2997 is offered in commercial, industrial and automotive versions, supporting operating temperature ranges from 0 to 70 °C, -40 to 85 °C and -40 to 125 °C, respectively. The LTC2997 is available today in a small RoHS compliant, 6-pin, 2 mm x 3 mm DFN package. Pricing starts at $1.45 each in 1,000 piece quantities.
More information about the LTC2997 temperature-to-voltage converter at
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Internet of Things (IoT) manufacturer Ciseco has launched the Raspberry Pi ‘Wireless Inventors Kit’ (RasWIK), featuring 88 pieces to provide everything a Pi owner needs to follow a series of step-by-step projects or to create their own wireless devices, without the need for configuration or even writing code.
RasWIK has been designed to be highly accessible, demystifying the dark art of wireless and enabling anyone with basic computing skills to begin building wireless devices with a Raspberry Pi. You can create anything from a simple traffic light, to a battery monitor, or even a temperature gauge that sends data to the Xively IoT cloud so billions can access the data.This month, Ciseco is giving away twelve Raspberry Pi Wireless Inventors kits, worth £49.99 each for EETimes Europe's readers to win.
And the winners are...
In our previous reader offer, Farsens was giving away five kits for EEtimes Europe readers to evaluate its FenixVortex, Kineo and X1 wireless, battery free sensor tags.
Lucky winners include Mr A. Neil from the UK, Mr. E. Delvaux from Belgium, Mr Lengal from the Czech Republic, Mr H. Bijlsma from the Netherlands, and Mr G. Pfaff from Germany. All should be receiving their packages soon. Lets wish them some interesting findings with their projects.
December 15, 2011 | Texas instruments | 222901974
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