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DUAL
CHANNEL TEMPERATURE SENSOR
The
ADT7461 is an enhanced digital temperature sensor that can
monitor a wide temperature range. It automatically cancels
temperature errors because of resistance in series with
the remote sensor. The default temperature measurement range
of 0° to 127°C can be configured to a remote-sensor extended
range of –64° to 191°C, which is used to measure temperatures
from –40° to 150°C. The device automatically compensates
for as much as 1 kW of series parasitic resistance between
the sensor and recording circuits.
The
ADT7461 cancels thermal measurement inaccuracies caused
by resistance in series with the thermal diode sensor by
automatically switching current sources, comparing the resulting
output voltages, and calculating the corrected temperature.
Additional on-chip signal conditioning eliminates the effects
of noise in the sensor circuits. The remote sensor has 0.25°C
resolution and 1°C accuracy; the local sensor has 1°C resolution
and 3°C accuracy.
The
ADT7461 costs $1.70 per unit in 1000-piece quantities.
Analog
Devices, Inc.
(800)
262-5643
www.analog.com
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