MCP402XEV Microchip Technology, MCP402XEV Datasheet - Page 15

• Manufacturer Part Number: MCP402XEV
• Description: BOARD EVAL FOR MCP402X
• Manufacturer: Microchip Technology

Specifications of MCP402XEV

• Main Purpose: Digital Potentiometer
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP4021
• Primary Attributes: 1 Single Pot, 10 kOhm, 64 Tap, Non Volatile
• Secondary Attributes: 2.7 ~ 5.5 V, 150 ppm/°C
• Processor To Be Evaluated: MCP402X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

© 2005 Microchip Technology Inc.
2.3.1
1. Connect the power supply “+” to V
2. Connect the voltmeter to the W terminal and GND.
The voltmeter should reflect the wiper setting with respect to Equation 2-3.
EQUATION 2-3:
Using R2 and R3 = 2.5 k
• If a 2 k
• If a 5 k
• If a 10 k MCP4021 is utilized, the output range will be approximately 0.83V to
• If a 50 k MCP4021 is utilized, the output range will be approximately 0.23V to
3.21V.
3.75V.
4.17V.
4.77V.
Test Setup
MCP4021 is utilized, the output range will be approximately 1.79V to
MCP4021 is utilized, the output range will be approximately 1.25V to
V
wiper
POPULATED PCB – VOLTAGE DIVIDER CALCULATION
=
Where:
V
------------------------------------------ -
R2
DD
d = the wiper setting (0 to 63)
+
R3
R
wb
+
Installation and Operation
+
R
R3
DD
AB
=
and the “–” to GND.
5.0V
---------------------------------------------------------------------
2.5k
d 10k
+
2.5k
+
63
10k
+
2.5k
DS51546B-page 11