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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8.0
APPLICATIONS EXAMPLES
Digital potentiometers have a multitude of practical
uses in modern electronic circuits. The most popular
uses include precision calibration of set point thresh-
olds, sensor trimming, LCD bias trimming, audio atten-
uation, adjustable power supplies, motor control
overcurrent trip setting, adjustable gain amplifiers and
offset trimming. The MCP433X/435X devices can be
used to replace the common mechanical trim pot in
applications where the operating and terminal voltages
are within CMOS process limitations (V
5.5V).
8.1
Split Rail Applications
All inputs that would be used to interface to a host
controller support high voltage on their input pin. This
allows the MCP43XX device to be used in split power
rail applications.
An example of this is a battery application where the
®
PIC
MCU is directly powered by the battery supply
(4.8V) and the MCP43XX device is powered by the
3.3V regulated voltage.
For SPI applications, these inputs are:
• CS
• SCK
• SDI (or SDI/SDO)
• RESET
Figure 8-1
through
Figure 8-2
show three example split
rail systems. In this system, the MCP43XX interface
input signals need to be able to support the PIC MCU
output high voltage (V
).
OH
In Example #1
(Figure
8-1), the MCP43XX interface
input signals need to be able to support the PIC MCU
output high voltage (V
). If the split rail voltage delta
OH
becomes too large, then the customer may be required
to do some level shifting due to MCP43XX V
related to host controller V
levels.
IH
In Example #2
(Figure
8-2), the MCP43XX interface
input signals need to be able to support the lower
voltage of the PIC MCU output high voltage level (V
Table 8-1
shows an example PIC microcontroller I/O
voltage
specifications
and
the
specifications. So this PIC MCU operating at 3.3V will
drive a V
at 2.64V, and for the MCP43XX operating
OH
at 5.5V, the V
is 2.47V. Therefore, the interface
IH
signals meet specifications.
 2010 Microchip Technology Inc.
MCP433X/435X
5V
Voltage
Regulator
PIC
= 2.7V to
DD
FIGURE 8-1:
System 1.
Voltage
Regulator
3V
®
PIC
MCU
SDI
CS
SCK
I/O
SDO
FIGURE 8-2:
System 2.
TABLE 8-1:
®
(1)
PIC
MCU
V
V
V
DD
IH
5.5
4.4
4.4
5.0
4.0
4.0
levels
OH
4.5
3.6
3.6
3.3
2.64 2.64 4.5
3.0
2.4
2.4
).
OH
2.7
2.16 2.16 5.5
Note 1:
V
OH
MCP43XX
V
OL
V
minimum = 0.8 * V
IH
V
maximum = 0.2 * V
IL
2:
V
OH
V
OL
V
minimum = 0.45 * V
IH
V
maximum = 0.2 * V
IL
3:
The only MCP4XXX output pin is SDO,
which is open-drain (or open-drain with
internal pull-up) with high voltage support
3V
®
MCP4XXX
MCU
SDI
SDI
CS
CS
SCK
SCK
I/O
RESET
SDO
SDO
Example Split Rail
5V
MCP4XXX
SDI
CS
SCK
RESET
SDO
Example Split Rail
V
– V
COMPARISONS
OH
IH
(2)
MCP4XXX
Comment
V
V
V
OH
DD
IH
OH
(3)
2.7
1.215 —
(3)
3.0
1.35
(3)
3.3
1.485 —
(3)
2.025 —
(3)
5.0
2.25
(3)
2.475 —
minimum = 0.8 * V
;
DD
maximum = 0.6V
;
DD
;
DD
minimum (SDA only) =;
maximum = 0.2 * V
DD
;
DD
DD
DS22242A-page 63