MCP2036-E/MG MICROCHIP [Microchip Technology], MCP2036-E/MG Datasheet - Page 7
MCP2036-E/MG
Manufacturer Part Number
MCP2036-E/MG
Description
Inductive Sensor Analog Front End Device
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.MCP2036-EMG.pdf
(30 pages)
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3.0
The MCP2036 is an Analog Front End device that uses
the electromagnetic interaction between a conductive
target and a sensing coil to detect the pressure applied
by the user on the surface of a touch panel. The device
incorporates all analog blocks for a simple inductor
impedance measurement circuit.
FIGURE 3-1:
© 2009 Microchip Technology Inc.
APPLICATIONS
Key Coils
Using Analog-Multiplexer for Key Selection (Example)
Key Coils
LREF
CD4052
0
1
2
3
1
0
2
3
LREF
For an inductive touch system, two methods are used
for switching the driver and measurement circuitry
between the different sensor coils: analog multiplexers
and GPIO grounding (see
The MCP2036 is designed to work with both
configurations:
10nF
10nF
10Ω
10nF
10nF
10Ω
4K7
4K7
4K7
4K7
PIC
LREF
REFSEL
I/O
I/O
I/O
I/O
I/O
PIC
DRVOUT
LBTN
®
MCP2036
LBTN
REFSEL
I/O
I/O
DRVOUT
LREF
I/O
Microcontroller
MCP2036
®
Microcontroller
Figure 3-1
MCP2036
DS22186B-page 7
and
Figure
3-2).
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