Document
MCP4021/2/3/4
Low-Cost NV Digital POT with WiperLock™ Technology
Features
• Nonvolatile 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 k, 5 k, 10 k or 50 k • Low Tempco:
- Absolute (Rheostat): 50 ppm (0°C to 70°C Typ.) - Ratiometric (Potentiometer): 10 ppm (Typ.) • Low Wiper Resistance: 75 (Typ.) • WiperLock™ Technology to Secure the Wiper Setting in Nonvolatile 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 k Device
Description
The MCP4021/2/3/4 devices are nonvolatile, 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™ technology, 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
VDD 1 VSS 2
A3 A W4
8 U/D
7 NC B 6B W 5 CS
MCP4023 SOT-23-6 Potentiometer
VDD 1
A
VSS 2 B U/D 3
6A W 5W
4 CS
MCP4022
SOT-23-6 Rheostat
VDD 1 VSS 2 U/D 3
AW B
6A 5W 4 CS
MCP4024 SOT-23-5 Rheostat
VDD 1
W
VSS 2 B
U/D 3
5W A
4 CS
Block Diagram
A
VDD
Power-Up
and
Brown-Out
VSS
Control
Wiper Register (Resistor Array)
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 (k) Wiper ()
# of Steps
VDD Operating
Range
Control Interface
WiperLock 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.
.
2006-2023 Microchip Technology Inc.
DS20001945G-page 1
MCP4021/2/3/4
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
VDD ............................................................................................................. 6.5V CS and U/D inputs w.r.t VSS .................................. –0.3V to 12.5V A, B and W terminals w.r.t VSS................... –0.3V to VDD + 0.3V Current at Input Pins ..................................................±10 mA Current at Supply Pins ...............................................±10 mA Current at Potentiometer Pins ...................................±2.5 mA Storage temperature ....................................–65°C to +150°C Ambient temp. with power applied ...............–55°C to +125°C ESD protection on all pins 4 kV (HBM), 400V (MM) Maximum Junction Temperature (TJ) . .........................+150°C
† Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.
AC/DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all parameters apply across the specified operating ranges. TA = –40°C to +125°C, 2.1 k5 k10 kand50 kdevicesTypical specifications represent values for VDD = 5.5V, VSS = 0V, TA = +25°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Operating Voltage Range CS Input Voltage Supply Current
Resistance (± 20%)
VDD
2.7
—
VCS
VSS
—
IDD
—
45
—
15
—
0.3
—
0.6
RAB
1.68
2.1
4.0
5
5.5 12.5
— — 1
3 2.52 6.0
V
V
The CS pin will be at one of
three input levels (VIL, VIH or VIHH). (Note 6)
µA 5.5V, CS = VSS, fU/D = 1 MHz
µA 2.7V, CS = VSS, fU/D = 1 MHz
µA Serial Interface Inactive
(CS = VIH, U/D = VIH)
mA EE Write cycle, TA = +25°C
k -202 devices(Note 1)
k -502 devices(Note 1)
8.0
10
12.0
k -103 devices(Note 1)
40.0
50
60.0
k -503 devices(Note 1)
Resolution
N
64
Taps No Missing Codes
Step Resistance
RS
—
RAB / 63
—
Note 6
Note 1: Resistance is defined as the resistance between terminal A to terminal B.
2: INL and DNL are measured at VW with VA = VDD and VB = VSS. (–202 devices VA = 4V). 3: MCP4021/23 only, test conditions are: IW = 1.9 mA, code = 00h. 4: MCP4022/24 .