Datasheet

Digital Potentiometer Design Guide 7
Digital Potentiometer Solutions
Serial Interfaces
Microchip currently offers devices with one of the following
three serial interfaces:
■
An Up/Down interface
■
An SPI interface
■
An I
2
C interface
Increment
Decrement
Up/Down Interface
This is an easy to implement interface that requires two pins
and can be implemented with minimal software overhead.
This interface is also easy for test systems when using
the non-volatile devices as replacements for mechanical
potentiometers.
High voltage commands require the CS pin forced to the
VIHH voltage, instead of the VIL voltage. In this state, the
WiperLock Technology bit can be enabled and disabled.
Devices with Up/Down Interface
Device
Serial Interface Volatile (Vol) Non-Volatile (NV) # RS Resistors Rs Ω (typ.) Zero-Scale/ Full-Scale
(3)
# of Channels WiperLock™ Technology HV Commands Shutdown Mode Configuration Voltage Range # of Pins Packages I
DD max (μA)
(5)
MCP4011
(1)
U/D Vol 63 33.3/79.4/158.7/793.7 Y/Y 1 N Y(9) N Pot 1.8V to 5.5V
(6)
8 DFN 2x3 1
MCP4012
(1)
U/D Vol 63 33.3/79.4/158.7/793.7 Y/Y 1 N Y
(9)
N Rheo 1.8V to 5.5V
(6)
6 SOT 1
MCP4013
(1)
U/D Vol 63 33.3/79.4/158.7/793.7 Y/Y 1 N Y
(9)
N Pot
(7)
1.8V to 5.5V
(6)
6 SOT 1
MCP4014
(1)
U/D Vol 63 33.3/79.4/158.7/793.7 Y/Y 1 N Y
(9)
N Rheo
(7)
1.8V to 5.5V
(6)
5 SOT 1
MCP4021
(1)
U/D NV 63 33.3/79.4/158.7/793.7 Y/Y 1 Y Y N Pot 2.7V to 5.5V 8 SC70 1
MCP4022
(1)
U/D NV 63 33.3/79.4/158.7/793.7 Y/Y 1 Y Y N Rheo 2.7V to 5.5V 6 SC70 1
MCP4023
(1)
U/D NV 63 33.3/79.4/158.7/793.7 Y/Y 1 Y Y N Pot(7) 2.7V to 5.5V 6 SC70 1
MCP4024
(1)
U/D NV 63 33.3/79.4/158.7/793.7 Y/Y 1 Y Y N Rheo(7) 2.7V to 5.5V 5 SC70 1
1. Resistor options are: -202 (2.1 k), -502 (5.0 k), -103 (10.0 k), and -503 (50.0 k).
2. Resistor options are: -502 (5.0 k), -103 (10.0 k), 503 (50.0 k), and -104 (100.0 k).
3. Zero-scale allows the wiper to “directly” connect to Terminal B, while full-scale allows the wiper to “directly” connect to Terminal A.
4. There is one R
S resistor between the maximum wiper value and Terminal A.
5. This current is with the serial interface inactive, and not during an EEPROM write cycle (for non-volatile devices).
6. The serial interface has been tested to 1.8V, the device’s analog characteristics (resistor) have been tested from 2.7V to 5.5V. Review the device’s characterization graphs for information on analog performance between
1.8Vand 2.7V.
7. One of the terminal pins (A or B) is internally connected to ground, due to the limitation of the number of pins on the package.
8. Shutdown support via software (TCON register(s)). If device has SHDN pin, software shutdown also fuctions.
9. High voltage command support is for compatibility with the corresponding non-volatile version of the device.