MCP4332-503E/ST Microchip Technology, MCP4332-503E/ST Datasheet - Page 44

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MCP4332-503E/ST

Manufacturer Part Number
MCP4332-503E/ST
Description
IC DGTL POT QUAD 50K 14TSSOP
Manufacturer
Microchip Technology
Datasheet

Specifications of MCP4332-503E/ST

Taps
129
Resistance (ohms)
50K
Number Of Circuits
4
Temperature Coefficient
150 ppm/°C Typical
Memory Type
Volatile
Interface
SPI Serial
Voltage - Supply
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
14-TSSOP
Resistance In Ohms
50K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
MCP433X/435X
5.2
Each tap point (between the R
connection point for an analog switch. The opposite
side of the analog switch is connected to a common
signal which is connected to the Terminal W (Wiper)
pin.
A value in the volatile wiper register selects which
analog switch to close, connecting the W terminal to
the selected node of the resistor ladder.
The wiper can connect directly to Terminal B or to
Terminal A. A zero scale connection, connects the
Terminal W (wiper) to Terminal B (wiper setting of
000h). A full scale connection, connects the Terminal W
(wiper) to Terminal A (wiper setting of 100h or 80h). In
these configurations the only resistance between the
Terminal W and the other Terminal (A or B) is that of the
analog switches.
A wiper setting value greater than full scale (wiper
setting of 100h for 8-bit device or 80h for 7-bit devices)
will also be a full scale setting (Terminal W (wiper) con-
nected to Terminal A).
setting map.
Equation 5-2
determine the resistance between the wiper and
terminal B.
EQUATION 5-2:
DS22242A-page 44
N = 0 to 256 (decimal)
N = 0 to 128 (decimal)
R
R
Wiper
WB
WB
=
=
illustrates the calculation used to
R
------------- -
R
------------- -
256
128
AB
AB
N
N
Table 5-1
+
+
R
WB
R
R
W
W
CALCULATION
illustrates the full wiper
8-bit Device
7-bit Device
S
resistors) is a
TABLE 5-1:
3FFh-
07Fh-
03Fh-
Wiper Setting
081h
080h
041h
040h
001h
000h
7-bit
3FFh-
0FFh-
07Fh-
101h
100h
081h
080h
001h
000h
8-bit
VOLATILE WIPER VALUE VS.
WIPER POSITION MAP
Reserved (Full Scale (W = A)),
Increment and Decrement
commands ignored
Full Scale (W = A),
Increment commands ignored
W = N
W = N (Mid Scale)
W = N
Zero Scale (W = B)
Decrement command ignored
 2010 Microchip Technology Inc.
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