REF200 Datasheet, PDF (17/34 Pages) Burr-Brown (TI) – DUAL CURRENT SOURCE/CURRENT SINK

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System Examples (continued)
RTD
Cable Shield
200-µA
Reference
Current
REF200
SBVS020B – SEPTEMBER 2000 – REVISED JULY 2015
R_OFFSET
INA110
Instrumentation Amplifier
V_OUT = Gain • 200 µA • Δ RTD
200-µA
Compensation
Current
+V_S
8 7 65
I
O
AB
C
1 2 34
REF200
–V_S
Figure 26. RTD Excitation With Three-Wire Lead Resistance Compensation
OPA602
Triangle Output
C
Square Output
R
10 kΩ
Frequency = 1/4RC (Hz)
Frequency = 25/C (Hz)
(C is in µF and R = 10 kΩ)
1N4148
1N4148
1/2
REF200
2 Vp-p
2 Vp-p
Bidirectional
Current Source
1N4148
1N4148
Figure 27. Precision Triangle Waveform Generator
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