CAT5115 Datasheet, PDF (6/9 Pages) Catalyst Semiconductor – 32-Tap Digitally Programmable Potentiometer

C_AA_PT_P5_L1_I1_C5_{ATIONS INFORMATION}
Potentiometer Configurations
(a) resistive divider (b) variable resistance
Applications
(c) two-port
V1
(-)
+5V
DPP
U/
3 ₊ A1
1
–
2
R2
R1
R2
CAT5114/5113/5115 ⁶ – ^A2
V2
5⁺
7
(+)
R3
R4
+5V _A3
9 _–4
+
8
VO
10
11
R3
R4
+2.5V
Programmable Instrumentation Amplifier
+5V
8
U/ ²
1
7
4
{^{RA R1 6}
} pRPOT
4
7
8
{ } 5
3
(1-p)RPOT
RB R2
3
555
6
5
C
.01 F,
.003 F
2
1
+5V
.01 F
Programmable Sq. Wave Oscillator (555)
OSC
CS
IC3A
1/4 74HC132
10k
0.01 F
Doc. No. 2117, Rev. E
+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