MCP4021 Datasheet, PDF (1/64 Pages) Microchip Technology – Low-Cost NV Digital POT with WiperLock™ Technology

MCP4021/2/3/4
Low-Cost NV Digital POT with WiperLock™ Technology
Features
• Non-volatile Digital Potentiometer in SOT-23,
SOIC, MSOP and DFN packages
• 64 Taps: 63 Resistors with Taps to terminal A and
terminal B
• Simple Up/Down (U/D) Protocol
• Power-on Recall of Saved Wiper Setting
• Resistance Values: 2.1 kΩ, 5 kΩ, 10 kΩ or 50 kΩ
• Low Tempco:
- Absolute (Rheostat): 50 ppm (0°C to 70°C typ.)
- Ratiometric (Potentiometer): 10 ppm (typ.)
• Low Wiper Resistance: 75Ω (typ.)
• WiperLock™ Technology to Secure the wiper
setting in non-volatile memory (EEPROM)
• 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:
- 4 MHz (typ.) for 2.1 kΩ device
Description
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.
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.
Package Types
MCP4021
SOIC, MSOP, DFN
Potentiometer
V_DD 1
V_SS 2
A
A3
W4
8 U/D
7 NC
B _6B
W _{5 CS}
MCP4023
SOT-23-6
Potentiometer
V_{DD 1}
A
V_{SS 2}
B
U/D ₃
6A
5W
W
4 ^CS
MCP4022
SOT-23-6
Rheostat
V_{DD 1}
V_{SS 2}
U/D ₃
A
6A
W
5W
B
4 ^CS
MCP4024
SOT-23-5
Rheostat
V_{DD 1}
W
V_{SS 2}
B
U/D ₃
5W
A
4 ^CS
Block Diagram
A
V_DD
Power-Up
and
Brown-Out
V_SS
Control
2-Wire
CS
Interface
W
and
U/D
Control
Logic
EEPROM and
WiperLock™
Technology
B
Device Features
Device
Wiper
Memory
Configuration Type
Resistance (typical)
Options (kΩ) Wiper (Ω)
# of
Steps
V_DD
Operating
Range
Control WiperLock™
Interface Technology
MCP4021 Potentiometer ⁽¹⁾ EE 2.1, 5.0, 10.0, 50.0
75
64 2.7V - 5.5V U/D
Yes
MCP4022
Rheostat
EE 2.1, 5.0, 10.0, 50.0 75
64 2.7V- 5.5V U/D
Yes
MCP4023 Potentiometer EE 2.1, 5.0, 10.0, 50.0 75
64 2.7V - 5.5V U/D
Yes
MCP4024
Rheostat
EE 2.1, 5.0, 10.0, 50.0 75
64 2.7V - 5.5V U/D
Yes
Note 1: Floating either terminal (A or B) allows the device to be used in Rheostat mode.
.
© 2006 Microchip Technology Inc.
DS21945E-page 1