CAT5113 Datasheet, PDF (6/9 Pages) Catalyst Semiconductor – 100-Tap Digitally Programmable Potentiometer

CAT5113
APPLICATIONS INFORMATION
Potentiometer Configurations
(a) resistive divider (b) variable resistance
Applications
(c) two-port
V1
(-)
+5V
DPP
U/
CAT5114/5113
V2
(+)
3 ₊ A1
1
–
2
R2
R1
R2
6 _– A2
+
7
5
R3
R4
9
+5V _A3
–⁴
+
8
10
11
+5V
VO
+5V
8
U/ ²
1
7
4
{^{RA R1 6}
} pRPOT
4
7
8
{ } 5
3
(1-p)RPOT
RB R2
3
555
R3
R4
+2.5V
6
5
2
1
C
.01 F,
.01 F
.003 F
Programmable Instrumentation Amplifier
Programmable Sq. Wave Oscillator (555)
OSC
CS
IC3A
1/4 74HC132
10k
0.01 F
Doc. No. 2009, Rev. R
+5V +200mV
7
20k
6
5
ICIB
1.00V = VREF
U/D
INC
CS
CAT5112/5111
IC2
+
VCORR ^499k
499k
–
Sensor
+5V
2_{– 4}
+
3
1
11
VOUT = 1V + 1mV
499k
-5V _ICIA
100mV = VSHIFT
499k
1V + 50mV
VSENSR
Sensor Auto Referencing Circuit
6