INA110
Instrumentation Amplifier
ROFFSET
Cable Shield
RTD
VOUT = Gain • 200µA • ∆ RTD
200µA
Reference
Current
200µA
Compensation
Current
+VS
8
6
5
7
I
O
C
A
B
REF200
1
2
3
4
–VS
FIGURE 11. RTD Excitation With Three Wire Lead Resistance Compensation.
2Vp-p
2Vp-p
Triangle Output
C
OPA602
Square Output
R
10kΩ
Frequency = 1/4RC (Hz)
Frequency = 25/C (Hz)
(C is in µF and R = 10kΩ)
1N4148
1N4148
Bidirectional
Current Source
1/2
REF200
1N4148
1N4148
FIGURE 12. Precision Triangle Waveform Generator.
®
10
REF200