MCP4021-202E/SN Microchip Technology, MCP4021-202E/SN Datasheet - Page 45

• Manufacturer Part Number: MCP4021-202E/SN
• Description: IC DGTL POT 2.1K 1CH 8SOIC
• Manufacturer: Microchip Technology

Specifications of MCP4021-202E/SN

• Memory Type: Non-Volatile
• Taps: 64
• Resistance (ohms): 2.1K
• Number Of Circuits: 1
• Temperature Coefficient: 150 ppm/°C Typical
• Interface: Up/Down
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Resistance In Ohms: 2.10K
• End To End Resistance: 2.1kohm
• Resistance Tolerance: ± 20%
• No. Of Steps: 64
• Supply Voltage Range: 2.7V To 5.5V
• Control Interface: Serial
• No. Of Pots: Single
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP4XXXDM-DB - BOARD DAUGHTER DIGIPOT MCP4XXXMCP402XEV - BOARD EVAL FOR MCP402X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

6.3
Understanding the operational characteristics of the
device’s resistor components is important to the system
design.
6.3.1
6.3.1.1
INL error for these devices is the maximum deviation
between an actual code transition point and its
corresponding ideal transition point after offset and
gain errors have been removed. These endpoints are
from 0x00 to 0x3F. Refer to
Positive INL means higher resistance than ideal.
Negative INL means lower resistance than ideal.
FIGURE 6-5:
© 2006 Microchip Technology Inc.
Digital
Input
Code
Operational Characteristics
ACCURACY
111
110
101
100
011
010
001
000
Integral Non-Linearity (INL)
Actual
Transfer
Function
INL Accuracy.
Digital Pot Output
Figure
INL < 0
INL < 0
6-5.
Ideal Transfer
Function
6.3.1.2
DNL error is the measure of variations in code widths
from the ideal code width. A DNL error of zero would
imply that every code is exactly 1 LSb wide.
FIGURE 6-6:
6.3.1.3
The ratiometric temperature coefficient quantifies the
error in the ratio R
This is typically the critical error when using a
potentiometer device (MCP4021 and MCP4023) in a
voltage divider configuration.
6.3.1.4
The absolute temperature coefficient quantifies the
error in the end-to-end resistance (nominal resistance
R
critical error when using a rheostat device (MCP4022
and MCP4024) in an adjustable resistor configuration.
Digital
Input
Code
AB
) due to temperature drift. This is typically the
111
110
101
100
011
010
001
000
Differential Non-Linearity (DNL)
Ratiometric Temperature Coefficient
Absolute Temperature Coefficient
MCP4021/2/3/4
Actual
Transfer
Function
AW
Digital Pot Output
DNL Accuracy.
/R
WB
due to temperature drift.
Narrow Code < 1 LSb
Wide Code, > 1 LSb
DS21945E-page 45
Ideal Transfer
Function