X93154 Datasheet, PDF (7/9 Pages) Intersil Corporation – Digitally Controlled Potentiometer

X93154
Applications Information (Continued)
Micro-Power LCD Contrast Control
3.3V
240K
100K
3.3V
+
U1A
-
100K
50K
300K
100K
-
U1B
+
-12V
X93154 (R_TOTAL)
V_OUT = -3.88
( 1+
100K
)
50K + R_TOTAL
V_OUT = -2.75V to -11.6V
U1 = LMC6042
Single Supply Variable Gain Amplifier
3.3V
20K
20K
V_IN
10K
3.3V
+
U1
-
X93154
(R_TOTAL)
V_OUT
Gain = ^RTOTAL
10K
U1 = LMC6042
7
FN8180.2
October 5, 2005