X9258_11 Datasheet, PDF (17/20 Pages) Intersil Corporation – Quad Digital Controlled Potentiometers(XDCP™)

X9258
Applications information
Basic Configurations of Electronic Potentiometers
V_R
+V_R
V_W/R_W
FIGURE 9. THREE TERMINAL POTENTIOMETER; VARIABLE
VOLTAGE DIVIDER
Application Circuits
V_S
+
V_O
–
R₂
R₁
V_O = (1+ R₂/R₁) V_S
FIGURE 11. NON-INVERTING AMPLIFIER
I
FIGURE 10. TWO-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 R₂
FIGURE 12. VOLTAGE REGULATOR
R₁
R₂
V_S
100kΩ
–
V_O
+
10kΩ
TL072
10kΩ
10kΩ
+12V
-12V
FIGURE 13. OFFSET VOLTAGE ADJUSTMENT
V_S
–
V_O
+
R₁ R₂
V_UL = {R₁/(R₁+R₂)} V_O(MAX)
V_LL = {R₁/(R₁+R₂)} V_O(MIN)
FIGURE 14. COMPARATOR WITH HYSTERESIS
17
FN8168.5
April 14, 2011