MCP4018 MICROCHIP [Microchip Technology], MCP4018 Datasheet - Page 30

• Manufacturer Part Number: MCP4018
• Manufacturer: MICROCHIP [Microchip Technology]

MCP4017/18/19
3.1
The V
The input power supply is relative to V
from 1.8V to 5.5V. A de-coupling capacitor on V
V
performance.
While the device’s voltage is in the range of 1.8V ≤ V
< 2.7V, the Resistor Network’s electrical performance
of the device may not meet the data sheet
specifications.
3.2
The V
3.3
The SCL pin is the serial clock pin of the I
The MCP401X acts only as a slave and the SCL pin
accepts only external serial clocks. The SCL pin is an
open-drain output. Refer to Section 5.0 “Serial
Interface - I
Interface communication.
3.4
The SDA pin is the serial data pin of the I
The SDA pin has a Schmitt trigger input and an
open-drain output. Refer to Section 5.0 “Serial
Interface - I
Interface communication.
3.5
The terminal B pin (available on some devices) is
connected to the internal potentiometer’s terminal B.
The potentiometer’s terminal B is the fixed connection
to the Zero Scale (0x00 tap) wiper value of the digital
potentiometer.
The terminal B pin is available on the MCP4017 device.
The terminal B pin does not have a polarity relative to
the terminal W pin. The terminal B pin can support both
positive and negative current. The voltage on terminal
B must be between V
The terminal B pin is not available on the MCP4018
and MCP4019 devices. For these devices, the
potentiometer’s terminal B is internally connected to
V
3.6
The terminal W pin is connected to the internal
potentiometer’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
DS22147A-page 30
SS
SS
)
.
DD
SS
is
Positive Power Supply Input (V
pin is the device’s positive power supply input.
Ground (V
pin is the device ground reference.
I
I
Potentiometer Terminal B
Potentiometer Wiper (W) Terminal
2
2
C Serial Clock (SCL)
C Serial Data (SDA)
recommended
2
2
C Module” for more details of I
C Module” for more details of I
SS
SS
and V
)
to
DD
.
achieve
SS
and can range
2
2
C interface.
C interface.
maximum
2
2
C Serial
C Serial
DD
DD
(to
DD
)
W pin can support both positive and negative current.
The voltage on terminal W must be between V
V
3.7
The terminal A pin (available on some devices) is
connected to the internal potentiometer’s terminal A.
The potentiometer’s terminal A is the fixed connection
to the Full Scale (0x7F tap) wiper value of the digital
potentiometer.
The terminal A pin is available on the MCP4018
devices. The terminal A pin does not have a polarity
relative to the terminal W pin. The terminal A pin can
support both positive and negative current. The voltage
on Terminal A must be between V
The terminal A pin is not available on the MCP4017
and MCP4019 devices. For these devices, the
potentiometer’s terminal A is internally floating.
DD
.
Potentiometer Terminal A
© 2009 Microchip Technology Inc.
SS
and V
DD
.
SS
and