MCP4021/2/3/4
Low-Cost NV Digital POT with WiperLock™ Technology
Package Types
Features
MCP4021
MCP4022
• Non-volatile Digital Potentiometer in SOT-23,
SOIC, MSOP and DFN packages
SOIC, MSOP, DFN
Potentiometer
SOT-23-6
Rheostat
• 64 Taps: 63 Resistors with Taps to terminal A and
terminal B
V
V
A
8
7
6
5
U/D
1
2
3
4
1
2
3
6
5
4
DD
DD
A
W
• Simple Up/Down (U/D) Protocol
V
V
W
CS
NC
B
SS
A
SS
• Power-on Recall of Saved Wiper Setting
• Resistance Values: 2.1 kΩ, 5 kΩ, 10 kΩ or 50 kΩ
• Low Tempco:
A
B
U/D
B
W
W
CS
- Absolute (Rheostat): 50 ppm (0°C to 70°C typ.)
- Ratiometric (Potentiometer): 10 ppm (typ.)
• Low Wiper Resistance: 75Ω (typ.)
MCP4023
MCP4024
SOT-23-6
Potentiometer
SOT-23-5
Rheostat
A
V
W
5
V
• WiperLock™ Technology to Secure the wiper
setting in non-volatile memory (EEPROM)
A
1
2
3
6
5
4
1
2
3
DD
DD
W
V
W
CS
V
SS
SS
W
B
B
A
• High-Voltage Tolerant Digital Inputs: Up to 12.5V
• Low-Power Operation: 1 µA Max Static Current
• Wide Operating Voltage: 2.7V to 5.5V
• Extended Temperature Range: -40°C to +125°C
• Wide Bandwidth (-3 dB) Operation:
U/D
U/D
CS
4
Block Diagram
A
- 4 MHz (typ.) for 2.1 kΩ device
VDD
Power-Up
and
Brown-Out
Control
Description
VSS
The MCP4021/2/3/4 devices are non-volatile, 6-bit
digital potentiometers that can be configured as either a
potentiometer or rheostat. The wiper setting is
controlled through a simple Up/Down (U/D) serial
interface.
2-Wire
Interface
and
Control
Logic
W
CS
U/D
These device’s implement Microchip’s WiperLock tech-
nology, which allows application-specific calibration
settings to be secured in the EEPROM without
requiring the use of an additional write-protect pin.
EEPROM and
WiperLock™
Technology
B
Device Features
Resistance (typical)
VDD
Operating
Range
Wiper
Configuration
Memory
Type
# of
Steps
Control WiperLock™
Interface Technology
Device
Options (kΩ)
Wiper (Ω)
MCP4021 Potentiometer (1)
EE
EE
EE
EE
2.1, 5.0, 10.0, 50.0
2.1, 5.0, 10.0, 50.0
2.1, 5.0, 10.0, 50.0
2.1, 5.0, 10.0, 50.0
75
75
75
75
64 2.7V - 5.5V
64 2.7V- 5.5V
U/D
U/D
U/D
U/D
Yes
Yes
Yes
Yes
MCP4022
MCP4023
MCP4024
Rheostat
Potentiometer
Rheostat
64 2.7V - 5.5V
64 2.7V - 5.5V
Note 1: Floating either terminal (A or B) allows the device to be used in Rheostat mode.
.
© 2006 Microchip Technology Inc.
DS21945E-page 1