CAT5113LI-01 Datasheet, PDF (7/13 Pages) ON Semiconductor – 100‐tap Digital Potentiometer (POT)

CAT5113
APPLICATIONS INFORMATION
(a) resistive divider
(b) variable resistance
Figure 5. Potentiometer Configuration
(c) two−port
Applications
V₁ (−)
3
+
1 ^R3
R₄
2_–
+5 V
28
1
7
R₂
R₁
R₂
+5 V
9 – ⁴ A₃
10
+
8
11
V_O
4
CAT5113/5114
–
6
V₂ (+)
5⁺
R₃
R₄
+2.5 V
7
A₁ = A₂ = A₃ = ¹/₄ LM6064
R₂ = R₃ = R₄ = 5 kW
R_POT = 10 kW
Figure 6. Programmable Instrumentation
Amplifier
+5 V
2
1
8
R_A
7
4
R_B
C
R₁
6
pR_POT
4
7
3 ^{5 (1−p)RPOT}
R₂
6
+5 V
8
3
555
5
0.01 mF
0.003 mF
2
1
0.01 mF
Figure 7. Programmable Sq. Wave Oscillator (555)
OSC
CS
IC3A
1_{/4 74HC132}
10 kW
0.01 mF
+5 V _{+200 mV}
8
2
1
7
+
4
–
CAT5111/5112
IC2
7
20 kW _IC1B
6
V_REF = 1 V
5
V_CORR
499 kW
2
3
499 kW
+5 V
–
4
1
V_OUT = 1 V  1 mV
+ _{11 IC1A}
−5 V
499 kW
499 kW
V_SENSOR = 1 V  50 mV
Figure 8. Sensor Auto Referencing Circuit
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