MCP4161-502E/SN Microchip Technology, MCP4161-502E/SN Datasheet - Page 60

• 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

MCP414X/416X/424X/426X
8.2
The circuit in
TC1240A doubling charge pump. When the SHDN pin
is high, the TC1240A is off, and the level on the CS pin
is controlled by the PIC® microcontrollers (MCUs) IO2
pin.
When the SHDN pin is low, the TC1240A is on and the
V
pin to go higher than the voltage such that the PIC
MCU’s IO2 pin “clamps” at approximately V
FIGURE 8-3:
generate the V
The circuit in
MCP402X Non-volatile Digital Potentiometer Evalua-
tion Board (Part Number: MCP402XEV). This method
requires that the system voltage be approximately 5V.
This ensures that when the PIC10F206 enters a
brown-out condition, there is an insufficient voltage
level on the CS pin to change the stored value of the
wiper. The MCP402X Non-volatile Digital Potentiome-
ter Evaluation Board User’s Guide (DS51546) contains
a complete schematic.
GP0 is a general purpose I/O pin, while GP2 can either
be a general purpose I/O pin or it can output the internal
clock.
For the serial commands, configure the GP2 pin as an
input (high impedance). The output state of the GP0 pin
will determine the voltage on the CS pin (V
For high-voltage serial commands, force the GP0
output pin to output a high level (V
GP2 pin to output the internal clock. This will form a
charge pump and increase the voltage on the CS pin
(when the system voltage is approximately 5V).
DS22059B-page 60
OUT
PIC MCU
voltage is 2 * V
Techniques to force the CS pin to
V
IO1
IO2
IHH
Figure 8-4
Figure 8-3
IHH
voltage.
DD
R
Using the TC1240A to
. The resistor R
1
shows the method used on the
SHDN
V
TC1240A
IN
shows a method using the
V
OUT
C
OH
C+
2
C-
) and configure the
CS
1
allows the CS
MCP402X
IL
DD
or V
.
C
1
IH
).
FIGURE 8-4:
Digital Potentiometer Evaluation Board
(MCP402XEV) implementation to generate the
V
8.3
Figure 8-5
the
Disconnecting the wiper allows the transistor input to
be taken to the Bias voltage level (disconnecting A and
or B may be desired to reduce system current).
Disconnecting Terminal A modifies the transistor input
by the R
Disconnecting Terminal B modifies the transistor input
by the R
Common A and Common B connections could be
connected to V
FIGURE 8-5:
using Terminal Disconnects.
IHH
Input
PIC10F206
Input
voltage.
independent
Using Shutdown Modes
AW
GP0
GP2
BW
shows a possible application circuit where
Balance
rheostat value to the Common A. The
DD
rheostat value to the Common B.
B
A
C
and V
Common A
1
Common B
terminals
MCP4XXX Non-volatile
Example Application Circuit
© 2008 Microchip Technology Inc.
SS
W
.
R
Bias
1
could
To base
of Transistor
(or Amplifier)
C
2
CS
MCP4XXX
be
used.