MCP414X/416X/424X/426X
7/8-Bit Single/Dual SPI Digital POT with
Non-Volatile Memory
Features
Description
Single or Dual Resistor Network options The MCP41XX and MCP42XX devices offer a wide
Potentiometer or Rheostat configuration options range of product offerings using an SPI interface.
Resistor Network Resolution WiperLock Technology allows application-specific
- 7-bit: 128 Resistors (129 Steps) calibration settings to be secured in the EEPROM.
- 8-bit: 256 Resistors (257 Steps)
R Resistances options of:
AB Package Types (top view)
-5k
-10k
MCP41X1
MCP41X2
-50k
Single Potentiometer
Single Rheostat
- 100 k
CS
CS 1 8 V 1 8 V
DD
DD
Zero-Scale to Full-Scale Wiper operation
SCK SCK
2 7 P0B 2 7 SDO
Low Wiper Resistance: 75 (typical)
SDI/SDO P0W SDI
3 6 3 6 P0B
Low Tempco: V 4 5 P0A V 4 5 P0W
SS SS
- Absolute (Rheostat): 50 ppm typical
PDIP, SOIC, MSOP PDIP, SOIC, MSOP
(0C to 70C)
- Ratiometric (Potentiometer): 15 ppm typical
CS CS V
1 8 V 1 8
DD
DD
Non-volatile Memory
SCK 2 7 P0B SCK 2 7 SDO
- Automatic Recall of Saved Wiper Setting
EP EP
9 9
- WiperLock Technology
SDI/SDO
3 6 P0W SDI 3 6 P0B
SPI serial interface (10 MHz, modes 0,0 & 1,1)
V 4 5 P0A V 4 5 P0W
SS SS
- High-Speed Read/Writes to wiper registers
3x3 DFN*
3x3 DFN*
- Read/Write to Data EEPROM registers
- Serially enabled EEPROM write protect
- SDI/SDO multiplexing (MCP41X1 only)
MCP42X1 Dual Potentiometers
Resistor Network Terminal Disconnect Feature
via:
- Shutdown pin (SHDN)
16 15 14 13
V
CS 1 14 DD
- Terminal Control (TCON) Register
SCK WP
SDO 1 12
SCK 13
2
Write Protect Feature:
SDI 12 SHDN
3
SDI NC
2 11
EP
- Hardware Write Protect (WP) Control pin V
4 11 WP
SS
17
P0B
P0B V 3 10
P1B
- Software Write Protect (WP) Configuration bit 5 10 SS
P0W
P1W 9
6
P0W
Brown-out reset protection (1.5V typical) V
4 9
SS
P0A
P1A 8
7
Serial Interface Inactive current (2.5 uA typical)
56 7 8
PDIP, SOIC, TSSOP
High-Voltage Tolerant Digital Inputs: Up to 12.5V
Supports Split Rail Applications
Internal weak pull-up on all digital inputs 4x4 QFN*
Wide Operating Voltage:
- 2.7V to 5.5V - Device Characteristics MCP42X2 Dual Rheostat
Specified
CS 1 10 V
DD
CS 1 10 V
DD
- 1.8V to 5.5V - Device Operation
SDO
SCK 2 9 SCK
2 9 SDO
Wide Bandwidth (-3dB) Operation:
P0B EP
SDI 3 8
SDI 3 8 P0B
- 2 MHz (typical) for 5.0 k device V P0W 11
4 7
SS
6 P1W V P0W
Extended temperature range (-40C to +125C) P1B 5 4 7
SS
6 P1W
P1B 5
MSOP, DFN
3x3 DFN*
* Includes Exposed Thermal Pad (EP); see Table 3-1.
2008 Microchip Technology Inc. DS22059B-page 1
P1B CS
P1W
V
DD
P1A SDO
SHDN
P0AMCP414X/416X/424X/426X
Device Block Diagram
V Power-up/
P0A
DD
Resistor
Brown-out
Network 0
V
SS
Control
(Pot 0)
P0W
Wiper 0
CS SPI Serial
& TCON
Interface
SCK
Register
Module &
P0B
SDI
Control
SDO Logic
(WiperLock
P1A
Resistor
Technology)
WP
Network 1
SHDN
(Pot 1)
P1W
For Dual Potentiometer
Wiper 1
Devices Only
Memory (16x9)
& TCON
Register
Wiper0 (V & NV)
P1B
Wiper1 (V & NV)
TCON
For Dual Resistor Network
STATUS
Devices Only
Data EEPROM
(10 x 9-bits)
Device Features
Resistance (typical)
V
DD
Wiper
Wiper
Device Operating
Configuration
(2)
R Options (k) - R
AB W Range
()
(3) (1)
MCP4131 1 Potentiometer SPI RAM No Mid-Scale 5.0, 10.0, 50.0, 100.0 75 129 1.8V to 5.5V
(3)
MCP4132 1 Rheostat SPI RAM No Mid-Scale 5.0, 10.0, 50.0, 100.0 75 129 1.8V to 5.5V
(1)
MCP4141 1 Potentiometer SPI EE Yes NV Wiper 5.0, 10.0, 50.0, 100.0 75 129 2.7V to 5.5V
MCP4142 1 Rheostat SPI EE Yes NV Wiper 5.0, 10.0, 50.0, 100.0 75 129 2.7V to 5.5V
(3) (1)
MCP4151 1 Potentiometer SPI RAM No Mid-Scale 5.0, 10.0, 50.0, 100.0 75 257 1.8V to 5.5V
(3)
MCP4152 1 Rheostat SPI RAM No Mid-Scale 5.0, 10.0, 50.0, 100.0 75 257 1.8V to 5.5V
(1)
MCP4161 1 Potentiometer SPI EE Yes NV Wiper 5.0, 10.0, 50.0, 100.0 75 257 2.7V to 5.5V
MCP4162 1 Rheostat SPI EE Yes NV Wiper 5.0, 10.0, 50.0, 100.0 75 257 2.7V to 5.5V
(3) (1)
MCP4231 2 Potentiometer SPI RAM No Mid-Scale 5.0, 10.0, 50.0, 100.0 75 129 1.8V to 5.5V
(3)
MCP4232 2 Rheostat SPI RAM No Mid-Scale 5.0, 10.0, 50.0, 100.0 75 129 1.8V to 5.5V
(1)
MCP4241 2 Potentiometer SPI EE Yes NV Wiper 5.0, 10.0, 50.0, 100.0 75 129 2.7V to 5.5V
MCP4242 2 Rheostat SPI EE Yes NV Wiper 5.0, 10.0, 50.0, 100.0 75 129 2.7V to 5.5V
(3) (1)
MCP4251 2 Potentiometer SPI RAM No Mid-Scale 5.0, 10.0, 50.0, 100.0 75 257 1.8V to 5.5V
(3)
MCP4252 2 Rheostat SPI RAM No Mid-Scale 5.0, 10.0, 50.0, 100.0 75 257 1.8V to 5.5V
(1)
MCP4261 2 Potentiometer SPI EE Yes NV Wiper 5.0, 10.0, 50.0, 100.0 75 257 2.7V to 5.5V
MCP4262 2 Rheostat SPI EE Yes NV Wiper 5.0, 10.0, 50.0, 100.0 75 257 2.7V to 5.5V
Note 1: Floating either terminal (A or B) allows the device to be used as a Rheostat (variable resistor).
2: Analog characteristics only tested from 2.7V to 5.5V unless otherwise noted.
3: Please check Microchip web site for device release and availability
DS22059B-page 2 2008 Microchip Technology Inc.
# of POTs
Control
Interface
Memory
Type
WiperLock
Technology
POR Wiper
Setting
# of Steps