MCP4023 Microchip Technology, MCP4023 Datasheet - Page 25

• Manufacturer Part Number: MCP4023
• Description: Low-Cost NV Digital POT with WiperLock Technology
• Manufacturer: Microchip Technology

3.0
The descriptions of the pins are listed in
TABLE 3-1:
3.1
The V
The input power supply is relative to V
from 2.7V to 5.5V. A decoupling capacitor on V
V
performance.
3.2
The V
3.3
The terminal A pin is connected to the internal potenti-
ometer’s terminal A (available on some devices). The
potentiometer’s terminal A is the fixed connection to the
0x3F terminal of the digital potentiometer.
The terminal A pin is available on the MCP4021,
MCP4022 and MCP4023 devices. The terminal A pin
does not have a polarity relative to the terminal W or B
pins. The terminal A pin can support both positive and
negative current. The voltage on teminal A must be
between V
The terminal A pin is not available on the MCP4024.
The potentiometer’s terminal A is internally floating.
© 2006 Microchip Technology Inc.
Legend: TTL = TTL compatible input
MCP4021
SS
(SOIC-8)
)
1
2
3
4
5
6
7
8
DD
SS
is
PIN DESCRIPTIONS
Positive Power Supply Input (V
pin is the device’s positive power supply input.
Ground (V
pin is the device ground reference.
Potentiometer Terminal A
SS
I = Input
P = Power
recommended
Pin Number
(SOT-23-6)
and V
MCP4022
MCP4023
PIN FUNCTION TABLE
—
—
1
2
6
5
4
3
DD
.
SS
)
(SOT-23-5)
MCP4024
to
—
—
—
1
2
5
4
3
achieve
SS
Symbol
and can range
Table
V
V
U/D
NC
CS
W
A
B
DD
SS
maximum
A = Analog input
O = Output
3-1.
DD
DD
Type
(to
Pin
I/O
I/O
I/O
—
)
P
P
I
I
Buffer
Type
TTL
TTL
3.4
The terminal W pin is connected to the internal potenti-
ometer’s terminal W (the wiper). The wiper terminal is
the adjustable terminal of the digital potentiometer. The
terminal W pin does not have a polarity relative to
terminals A or B pins. The terminal W pin can support
both positive and negative current. The voltage on
teminal W must be between V
3.5
The terminal B pin is connected to the internal potenti-
ometer’s terminal B (available on some devices). The
potentiometer’s terminal B is the fixed connection to the
0x00 terminal of the digital potentiometer.
The terminal B pin is available on the MCP4021 device.
The terminal B pin does not have a polarity relative to
the terminal W or A pins. The terminal B pin can
support both positive and negative current. The voltage
on teminal B must be between V
The terminal B pin is not available on the MCP4022,
MCP4023 and MCP4024 devices.
For the MCP4023 and MCP4024, the internal potenti-
ometer’s terminal B is internally connected to V
Terminal B does not have a polarity relative to terminals
W or A. Terminal B can support both positive and
negative current.
For the MCP4022, terminal B is internally floating.
—
—
—
A
A
A
Positive Power Supply Input
Ground
Potentiometer Terminal A
Potentiometer Wiper Terminal
Chip Select Input
Potentiometer Terminal B
No Connection
Increment/Decrement Input
Potentiometer Wiper (W) Terminal
Potentiometer Terminal B
MCP4021/2/3/4
Function
SS
SS
and V
and V
DS21945E-page 25
DD
DD
.
.
SS
.