
MAKING YOUR OWN ADAPTER OR ACTIVE PROBE Page 59
C
YBER
A
MP
380, COPYRIGHT MARCH 2002, AXON INSTRUMENTS, INC.
software analysis.
AD590 Integrated Circuit Temperature Sensor
ANALOG GROUND
10
R3
10K
INPUT ( 1 )
INPUT ( 2 )
5.000 V
4
R1
2K
R2
9K
( GAIN )
AD59
10 mV/
°
K
Figure 22. The Analog Devices AD590 temperature measurement integrated circuit allows 1 µA/°K to flow in
the circuit. R1 is trimmed so that the circuit sensitivity is exactly 10 mV/°K. R3 is used to zero the nominal
2.73 V response at 0°C. Alternatively, this can be achieved using the Autozeroing function of the CyberAmp, or
in software.
LM35A Integrated Circuit Temperature Sensor
ANALOG GROUND
10
INPUT
1
5.000 V
4
V
GND
S
LM35A
OUT
10 mV/°C
Figure 23. This integrated circuit from National Semiconductor Corp. represents a simple solution to
temperature measurement. The LM35A data sheet should be consulted for circuits to extend the temperature
range or to implement remote sensing.
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