X9271_14 Datasheet, PDF (16/18 Pages) Intersil Corporation – Single, Digitally Controlled Potentiometer

X9271
Applications information
Basic Configurations of Electronic Potentiometers
V_R
+V_R
RW
3-terminal Potentiometer;
Variable Voltage Divider
Application Circuits
V_S
+
–
V_O
R₂
R₁
V_O = (1+R₂/R₁)V_S
FIGURE 7. NONINVERTING AMPLIFIER
R₁
R₂
V_S
100kΩ
–
+
V_O
10kΩ
TL072
10kΩ
10kΩ
+12V
-12V
FIGURE 9. OFFSET VOLTAGE ADJUSTMENT
I
2-terminal Variable Resistor;
Variable Current
V_IN
317
V_O (REG)
R₁
I_adj
R₂
V_O (REG) = 1.25V (1+R₂/R₁)+I_adj
FIGURE 8. VOLTAGE REGULATOR
V_S
–
+
V_O
R₁ R₂
V_UL = {R₁/(R₁+R₂)} V_O(max)
RL_L = {R₁/(R₁+R₂)} V_O(min)
FIGURE 10. COMPARATOR WITH HYSTERESIS
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FN8174.4
July 18, 2014