MCP4151-104E/MF Microchip Technology, MCP4151-104E/MF Datasheet - Page 59

• Manufacturer Part Number: MCP4151-104E/MF
• Description: IC POT DGTL SNGL 100K SPI 8DFN
• Manufacturer: Microchip Technology

Specifications of MCP4151-104E/MF

• Package / Case: 8-DFN
• Taps: 257
• Resistance (ohms): 100K
• Number Of Circuits: 1
• 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
• Resistance In Ohms: 100K
• Number Of Pots: Single
• Taps Per Pot: 256
• Resistance: 100 KOhms
• Wiper Memory: Volatile
• Digital Interface: Serial (SPI)
• Operating Supply Voltage: 2.5 V, 3.3 V, 5 V
• Supply Current: 1 mA
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.0
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
devices can be used to replace the common mechani-
cal trim pot in applications where the operating and
terminal voltages are within CMOS process limitations
(V
8.1
All inputs that would be used to interface to a Host
Controller support High Voltage on their input pin. This
allows the MCP4XXX device to be used in split power
rail applications.
An example of this is a battery application where the
PIC
(4.8V) and the MCP4XXX device is powered by the
3.3V regulated voltage.
For SPI applications, these inputs are:
• CS
• SCK
• SDI (or SDI/SDO)
• SHDN
Figure 8-1
rail systems. In this system, the MCP4XXX interface
input signals need to be able to support the PIC MCU
output high voltage (V
In Example #1
input signals need to be able to support the PIC MCU
output high voltage (V
becomes too large, then the customer may be required
to do some level shifting due to MCP4XXX V
related to Host Controller V
In Example #2
input signals need to be able to support the lower
voltage of the PIC MCU output high voltage level (V
Table 8-1
voltage
specifications. So this PIC MCU operating at 3.3V will
drive a V
at 5.5V, the V
signals meet specifications.
© 2008 Microchip Technology Inc.
DD
®
= 2.7V to 5.5V).
MCU is directly powered by the battery supply
trimming.
OH
APPLICATIONS EXAMPLES
Split Rail Applications
shows an example PIC microcontroller I/O
through
specifications
at 2.64V, and for the MCP4XXX operating
IH
(Figure
(Figure
is 2.47V. Therefore, the interface
Figure 8-2
The
OH
OH
8-1), the MCP4XXX interface
8-2), the MCP4XXX interface
).
). If the split rail voltage delta
MCP413X/415X/423X/425X
IH
and
levels.
show three example split
the
MCP4XXX
OH
levels
MCP413X/415X/423X/425X
OH
).
FIGURE 8-1:
System 1.
FIGURE 8-2:
System 2.
TABLE 8-1:
5.5
5.0
4.5
3.3
3.0
2.7
Note 1:
V
DD
5V
PIC
2:
3:
4.4
4.0
3.6
2.64 2.64 4.5
2.4
2.16 2.16 5.5
PIC MCU
V
Voltage
Regulator
3V
IH
(1)
SHDN
V
V
V
V
V
V
V
V
The only MCP4XXX output pin is SDO,
which is Open-Drain (or Open-Drain with
Internal Pull-up) with High Voltage Support
PIC MCU
SDO
OH
OL
IH
IL
OH
OL
IH
IL
Voltage
Regulator
SCK
SDI
4.4
4.0
3.6
2.4
CS
V
maximum = 0.2 * V
maximum = 0.2 * V
minimum = 0.8 * V
minimum = 0.45 * V
maximum = 0.6V
maximum = 0.2 * V
SHDN
OH
minimum = 0.8 * V
minimum (SDA only) =;
SDO
V
SCK
SDI
CS
OH
2.7
3.0
3.3
5.0
V
Example Split Rail
Example Split Rail
DD
- V
MCP4XXX
IH
3V
1.215 —
1.35
1.485 —
2.025 —
2.25
2.475 —
V
COMPARISONS
IH
DD
DD
DD
—
—
DD
MCP4XXX
(2)
DD
DD
V
SDI
CS
SCK
SHDN
SDO
DS22060B-page 59
;
;
OH
(3)
(3)
(3)
(3)
(3)
(3)
;
;
MCP4XXX
SDI
CS
SCK
SHDN
SDO
Comment
5V