Datasheet

®
REF200
10
FIGURE 12. Precision Triangle Waveform Generator.
FIGURE 11. RTD Excitation With Three Wire Lead Resistance Compensation.
1N41481N4148
1N41481N4148
Bidirectional
Current Source
1/2
REF200
OPA602
R
C
Triangle Output
Square Output
2Vp-p
2Vp-p
10kΩ
Frequency = 1/4RC (Hz)
Frequency = 25/C (Hz)
(C is in µF and R = 10kΩ)
7
V = Gain • 200µA • ∆ RTD
OUT
AB
O
C
I
–V
S
+V
S
RTD
Cable Shield
200µA
Reference
Current
200µA
Compensation
Current
REF200
1
R
OFFSET
INA110
Instrumentation Amplifier
234
865