參數(shù)資料
型號(hào): MCP2036T-I/ML
廠商: Microchip Technology
文件頁數(shù): 28/30頁
文件大?。?/td> 0K
描述: IC AFE KEYLESS ENTRY 16QFN
標(biāo)準(zhǔn)包裝: 3,300
系列: *
2009 Microchip Technology Inc.
DS22186C-page 7
MCP2036
3.0
APPLICATIONS
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.
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 Figure 3-1 and Figure 3-2).
The MCP2036 is designed to work with both
configurations:
FIGURE 3-1:
Using Analog-Multiplexer for Key Selection (Example)
MCP2036
LREF
LBTN
LREF
DRVOUT
10
Ω
10nF
REFSEL
10nF
I/O
0
1
2
3
0
1
3
2
CD4052
Key Coils
PIC Microcontroller
ISOL
I/O
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