MCP4341T-104E/ST Microchip Technology, MCP4341T-104E/ST Datasheet - Page 39
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MCP4341T-104E/ST
Manufacturer Part Number
MCP4341T-104E/ST
Description
IC DGTL POT QUAD 100K 20TSSOP
Manufacturer
Microchip Technology
Series
WiperLock™r
Datasheet
1.MCP4361-503EML.pdf
(80 pages)
Specifications of MCP4341T-104E/ST
Taps
129
Resistance (ohms)
100K
Number Of Circuits
4
Temperature Coefficient
150 ppm/°C Typical
Memory Type
Non-Volatile
Interface
SPI Serial
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP
Resistance In Ohms
100K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
5.0
The Resistor Network has either 7-bit or 8-bit
resolution. Each Resistor Network allows zero scale to
full scale connections.
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.
FIGURE 5-1:
© 2009 Microchip Technology Inc.
R
Note 1:
AB
R
R
R
R
S
S
S
S
RESISTOR NETWORK
A
B
The wiper resistance is dependent on
several factors including, wiper code,
device V
and W), and temperature.
Also for the same conditions, each tap
selection resistance has a small variation.
This R
some specifications (such as INL) for the
smaller
compared to larger resistance devices
(100.0 kΩ).
R
R
R
R
R
W
W
W
W
W
W
(1)
(1)
(1)
(1)
(1)
DD
variation has greater effects on
resistance
(100h)
Resistor Block Diagram.
(FFh)
(FEh)
(01h)
(00h)
, Terminal voltages (on A, B,
8-Bit
257
N =
256
255
Analog Mux
1
0
Figure 5-1
(80h)
(7Fh)
(7Eh)
(01h)
(00h)
7-Bit
128
N =
127
126
devices
1
0
shows a block
(5.0 kΩ)
W
5.1
The resistor ladder is a series of equal value resistors
(R
resistors. The total number of resistors in the series
(ladder)
Figure
connected to analog switches which are connected to
the device Terminal A and Terminal B pins. The R
(and R
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:
S
) with a connection point (tap) between the two
S
5-1). The end points of the resistor ladder are
) resistance has small variations over voltage
Resistor Ladder Module
determines
R
R
S
S
=
=
MCP434X/436X
shows the calculation for the step
------------- -
(
-------------
(
R
R
128
256
AB
AB
)
)
R
the
S
CALCULATION
R
AB
8-bit Device
7-bit Device
DS22233A-page 39
resistance
(see
AB