CAT5113_08 Datasheet, PDF (6/13 Pages) Catalyst Semiconductor – 100-Tap Digitally Programmable Potentiometer (DPP™)

CAT5113
APPLICATIONS INFORMATION
Potentiometer Configuration
(a) resistive divider (b) variable resistance
(c) two-port
Applications
V₁ (-)
3₊
R₃
R₄
1
–
2
+5V
8
2
1 _DPP
7
4
CAT5113/5114
V₂ (+)
R₂
R₁
R₂
6_–
5⁺
7
+5V
9
– ⁴ A₃
V_O
10 ⁺
8
11
R₃
R₄
+2.5V
A₁ = A₂ = A₃ = ¼ LM6064
R₂ = R₃ = R₄ = 5kΩ
R_POT = 10kΩ
Programmable Instrumentation Amplifier
+5V
8
R₁
2
R_A
6
1 _DPP
7
pR_POT
4
7
+5V
8
4
3 ^{5 (1-p)RPOT}
3
R_B
555
R₂
6
0.01µF
2
C
0.003µF
5
1
0.01µF
Programmable Sq. Wave Oscillator (555)
OSC
IC3A
¼ 74HC132
10kΩ
0.01µF
CS
+5V +200mV
8
2
1 _DPP
7
4
+
–
CAT5111/5112
IC2
7
6
V_REF = 1V
20kΩ
5
IC1B
V_CORR
499kΩ
499kΩ
+5V
2_–
4
1
V_OUT = 1V ± 1mV
3⁺
11 ^IC1A
-5V
499kΩ
499kΩ
V_SENSOR = 1V ± 50mV
Sensor Auto Referencing Circuit
Doc. No. MD-2009 Rev. V
6
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice