CAT5129 CATALYST [Catalyst Semiconductor], CAT5129 Datasheet - Page 7

• Manufacturer Part Number: CAT5129
• Description: 32-Tap Digitally Programmable Potentiometer (DPP TM)
• Manufacturer: CATALYST [Catalyst Semiconductor]

APPLICATION INFORMATION
Potentiometer Configurations
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
DPP
Applications
V IN (UNREG)
SHUTDOWN
CAT5127
2
1
7
+5V
2
1
7
+5V
Programmable Instrumentation Amplifier
4
V 1
4
(-)
V 2
(+)
8
8
Programmable Voltage Regulator
CAT5127
1µF
(a) resistive divider
3
2
6
5
R 1
+
–
–
+
SD
GND
R 2
R 2
A 1
100kΩ
A 2
2952
1
7
V OUT
FB
R 3
R 3
1.23V
10
9
6
3
(b) variable resistance
–
+
11kΩ
R 4
R 1
R 2
820
R 3
10k
R 4
+5V
4
11
A 3
0.1µF
8
+2.5V
V O
6.8µF
V O (REG)
7
I S
CAT5127
2
1
7
+5V
4
8
Programmable Sq. Wave Oscillator (555)
2
3
Programmable I to V convertor
0.003µF
(c) two-port
R A
R B
–
+
0.01µF
330
2
1
7
+5V
4
C
+5V
8
R 1
R 2
7
4
CAT5127
6
A1
6
6
3
pR
(1-p)R
}
}
3
pR POT
(1-p)R POT
330
7
6
4
CAT5127, CAT5129
LT1097
2
2
3
555
+2.5V
–
+
1M
8
+5V
1
7
4
3
5
Doc. No. 2127 Rev. A
6
A2
+5V
0.01µF
V O