Temperature-to-Voltage Converter Measures Remote Diodes with

Temperature-to-Voltage Converter Measures Remote Diodes with
News Release ⎜ www.linear.com
Temperature-to-Voltage Converter Measures
Remote Diodes with 1oC Accuracy
MILPITAS, CA – July 11, 2011 – Linear Technology Corporation introduces the LTC2997, a
high accuracy temperature-to-voltage converter with built-in series resistance cancellation for
2.5V to 5.5V 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 1.8V
voltage reference output is also available to share with an external ADC or for generating
temperature threshold voltages to compare against the VPTAT output.
The LTC2997 is offered in commercial, industrial and automotive versions, supporting
operating temperature ranges from 0°C to 70°C, -40°C to 85°C and -40°C to 125°C,
respectively. The LTC2997 is available today in a small RoHS compliant, 6-pin, 2mm x 3mm
DFN package. Pricing starts at $1.45 each in 1,000 piece quantities. Please visit
www.linear.com/product/LTC2997 for more product selection information.
Temperature-to-Voltage Converter Measures
Remote Diodes with 1oC Accuracy
page 2
Photo Caption: High Accuracy Temperature-to-Voltage Converter
Summary of Features: LTC2997
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Converts Remote or Internal Diode Temperature-to-Analog Voltage
±1°C Remote Temperature Accuracy
±1.5°C Internal Temperature Accuracy
Built-In Series Resistance Cancellation
2.5V to 5.5V Supply Voltage
1.8V Reference Voltage Output
3.5ms VPTAT Update Time
4mV/°C Output Gain
170μA Quiescent Current
6-Pin 2mm × 3mm DFN Package
About Linear Technology
Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing
and marketing a broad line of high performance analog integrated circuits for major companies
worldwide for three decades. The Company’s products provide an essential bridge between our
analog world and the digital electronics in communications, networking, industrial, automotive,
computer, medical, instrumentation, consumer, and military and aerospace systems. Linear
Technology produces power management, data conversion, signal conditioning, RF and interface
ICs, and µModule® subsystems.
LT, LTC, LTM, µModule and
are registered trademarks of Linear Technology Corp. All other trademarks are the
property of their respective owners.
Press Contacts:
North America / Worldwide
UK & Nordic
John Hamburger, Director Marketing
Communications
jhamburger@linear.com
Tel: 408-432-1900 ext 2419
Alan Timmins
alan@ezwire.com
Tel: +44-1-252-629937
Doug Dickinson, Media Relations Manager
ddickinson@linear.com
Tel: 408-432-1900 ext 2233
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