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MCP4021 Datasheet(PDF) 46 Page - Microchip Technology

Part # MCP4021
Description  Low-Cost NV Digital POT with WiperLock??Technology
PDF  64 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP4021 Datasheet(HTML) 46 Page - Microchip Technology

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MCP4021/2/3/4
DS21945E-page 46
© 2006 Microchip Technology Inc.
6.3.2
MONOTONIC OPERATION
Monotonic
operation
means
that
the
device’s
resistance increases with every step change (from
terminal A to terminal B or terminal B to terminal A).
The wiper resistance is different at each tap location.
When changing from one tap position to the next (either
increasing or decreasing), the
ΔRW is less than the
ΔRS. When this change occurs, the device voltage and
temperature are “the same” for the two tap positions.
FIGURE 6-7:
Resistance, RBW.
0x3F
0x3E
0x3D
0x03
0x02
0x01
0x00
Resistance (RBW)
RW
(@ tap)
RS0
RS1
RS3
RS62
RS63
RBW =
RSn + RW(@ Tap n)
n = 0
n = ?



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