User manual

Installation and Operation

2.2.3 Evaluating the MCP4023 and MCP4013

The MCP4023/13-XXXI/OT is a 6-pin, grounded digital potentiometer with terminals A

and W available on the device pins. Footprint U2 supports the SOT-23-6 package.

Populating R2 will create a voltage divider with a transfer function illustrated in

Equation 2-2.

EQUATION 2-2: GROUNDED POTENTIOMETER – VOLTAGE DIVIDER

CALCULATION

2.2.4 Evaluating the MCP4024 and MCP4014

The MCP4024/14-xxxI/OT is a 5-pin, grounded digital rheostat with the W terminals

available on the device pins. Footprint U2 supports the SOT-23-5 package. An “INCR”

command moves the wiper toward terminal A, thus causing the resistance across the

rheostat to increase. A “DECR” command moves the wiper toward terminal B, thus

causing the resistance across the rheostat to decrease.

wiper

⋅

R2 R

nom

--------------------------

5.0V d 10k

⋅

⁄

()

⋅

2.5k 10k+

-----------------------------------------------

Where:

d = the wiper setting (0 to 63)

Note 1: DO NOT populate U1 if using U2.

2: The included MCP4021 digital potentiometer samples could be used to

evaluate the MCP4023 simply by shorting terminal B to GND.

3: The MCP4013 has high-voltage tolerant pins and, therefore, accepts

high-voltage Increment and Decrement commands. Since this device is

nonvolatile, the WiperLock™ Technology feature is not present.

Note 1: DO NOT populate U1 if using U2.

2: The included MCP4021 digital potentiometer samples could be used to

evaluate the MCP4024 simply by not populating R

, letting terminal A

float and by shorting terminal B to GND.

3: The MCP4014 has high-voltage tolerant pins and, therefore, accepts

high-voltage Increment and Decrement commands. Since this device is

nonvolatile, the WiperLock™ Technology feature is not present.