CAT5127, CAT5129
APPLICATION INFORMATION
Potentiometer Configurations
(a) resistive divider
(b) variable resistance
(c) two-port
Applications
V1
(-)
3
+
–
A1
1
R3
R4
+5V
2
8
1
7
VO
4
+5V
RA
R1
6
2
DPP
+5V
8
R1
R2
R2
9
10
+5V
–
+
4
A3
8
2
1
7
4
11
}
}
RB
pRPOT
(1-p)RPOT
4
7
8
3
CAT5127
A2
7
R2
3
555
6
2
1
0.01µF
5
CAT5127
V2
(+)
6
5
–
+
R3
R4
+2.5V
0.01µF
0.003µF
C
Programmable Instrumentation Amplifier
Programmable Sq. Wave Oscillator (555)
+5V
100kΩ
2
1
7
V O (REG)
8
CAT5127
VOUT
SHUTDOWN
1µF
SD
GND
FB
1.23V
6
}
}
VIN (UNREG)
2952
11kΩ
R1
0.1µF
4
6.8µF
330
+5V
2
pR
(1-p)R
330
1M
+5V
3
+5V
2
1
7
4
8
3
R2
820
IS
–
7
4
6
A1
2
3
–
+
R3
CAT5127
6
3
+
7 6
VO
4
A2
10k
LT1097
+2.5V
Programmable Voltage Regulator
Programmable I to V convertor
Doc. No. MD-2127 Rev. C
8
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CATALYST [ CATALYST SEMICONDUCTOR ]
