MCP4161-502E/SN Microchip Technology, MCP4161-502E/SN Datasheet - Page 59

• Manufacturer Part Number: MCP4161-502E/SN
• Description: IC POT DGTL SNGL 5K SPI 8SOIC
• Manufacturer: Microchip Technology

Specifications of MCP4161-502E/SN

• Package / Case: 8-SOIC (3.9mm Width)
• Taps: 257
• Resistance (ohms): 5K
• Number Of Circuits: 1
• 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
• Resistance In Ohms: 5K
• Number Of Pots: Single
• Taps Per Pot: 256
• Resistance: 5 KOhms
• Wiper Memory: Non Volatile
• Digital Interface: Serial (4-Wire, SPI)
• Operating Supply Voltage: 2.5 V, 3.3 V, 5 V
• Supply Current: 550 uA
• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

8.0
Non-volatile digital potentiometers have a multitude of
practical uses in modern electronic circuits. The most
popular uses include precision calibration of set point
thresholds, sensor trimming, LCD bias trimming, audio
attenuation, 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)
• WP
• 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 and the MCP4XXX specifica-
tions. So this PIC MCU operating at 3.3V will drive a
V
the V
specifications.
© 2008 Microchip Technology Inc.
OH
DD
®
at 2.64V, and for the MCP4XXX operating at 5.5V,
IH
= 2.7V to 5.5V).
MCU is directly powered by the battery supply
is 2.47V. Therefore, the interface signals meet
trimming.
APPLICATIONS EXAMPLES
Split Rail Applications
shows an example PIC microcontroller I/O
through
(Figure
(Figure
Figure 8-2
The
OH
OH
8-1), the MCP4XXX interface
8-2), the MCP4XXX interface
).
). If the split rail voltage delta
MCP414X/416X/424X/426X
IH
levels.
show three example split
OH
levels
MCP414X/416X/424X/426X
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
WP
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
WP
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
WP
SHDN
SDO
DS22059B-page 59
;
;
OH
(3)
(3)
(3)
(3)
(3)
(3)
;
;
MCP4XXX
SDI
CS
SCK
WP
SHDN
SDO
Comment
5V