MCP4332-503E/ST

Manufacturer Part NumberMCP4332-503E/ST
DescriptionIC DGTL POT QUAD 50K 14TSSOP
ManufacturerMicrochip Technology
MCP4332-503E/ST datasheet
 


Specifications of MCP4332-503E/ST

Taps129Resistance (ohms)50K
Number Of Circuits4Temperature Coefficient150 ppm/°C Typical
Memory TypeVolatileInterfaceSPI Serial
Voltage - Supply1.8 V ~ 5.5 VOperating Temperature-40°C ~ 125°C
Mounting TypeSurface MountPackage / Case14-TSSOP
Resistance In Ohms50KLead Free Status / RoHS StatusLead free / RoHS Compliant
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5.0
RESISTOR NETWORK
The Resistor Network has either 7-bit or 8-bit
resolution. Each Resistor Network allows zero scale to
full scale connections.
Figure 5-1
diagram for the resistive network of a device.
The Resistor Network is made up of several parts.
These include:
• Resistor Ladder
• Wiper
• Shutdown (Terminal Connections)
Devices have either four resistor networks. These are
referred to as Pot 0, Pot 1, Pot 2 and Pot 3.
A
8-Bit
7-Bit
N =
N =
257
128
(100h)
(80h)
(1)
R
W
R
S
256
127
(FFh)
(7Fh)
(1)
R
R
W
S
255
126
(FEh)
(7Eh)
(1)
R
W
R
S
R
AB
1
1
(01h)
(01h)
(1)
R
R
W
S
0
0
(00h)
(00h)
(1)
R
W
Analog Mux
B
Note 1:
The wiper resistance is dependent on
several factors including, wiper code,
device V
, Terminal voltages (on A, B
DD
and W), and temperature.
Also for the same conditions, each tap
selection resistance has a small variation.
This R
variation has greater effects on
W
some specifications (such as INL) for the
smaller
resistance
devices
compared to larger resistance devices
(100.0 k).
FIGURE 5-1:
Resistor Block Diagram.
 2010 Microchip Technology Inc.
5.1
Resistor Ladder Module
The resistor ladder is a series of equal value resistors
(R
) with a connection point (tap) between the two
S
resistors. The total number of resistors in the series
shows a block
(ladder)
determines
Figure
5-1). The end points of the resistor ladder are
connected to analog switches which are connected to
the device terminal A and terminal B pins. The R
(and R
) resistance has small variations over voltage
S
and temperature.
For an 8-bit device, there are 256 resistors in a string
between terminal A and terminal B. The wiper can be
set to tap onto any of these 256 resistors thus providing
257 possible settings (including terminal A and
terminal B).
For a 7-bit device, there are 128 resistors in a string
between terminal A and terminal B. The wiper can be
set to tap onto any of these 128 resistors thus providing
129 possible settings (including terminal A and
terminal B).
Equation 5-1
resistance.
EQUATION 5-1:
R
S
W
R
S
(5.0 k)
MCP433X/435X
the
R
resistance
(see
AB
AB
shows the calculation for the step
R
CALCULATION
S
R
AB
=
-------------
8-bit Device
256
R
AB
=
------------- -
7-bit Device
128
DS22242A-page 43