參數(shù)資料
型號(hào)： MCP2036T-I/ML
廠商： Microchip Technology
文件頁數(shù)： 26/30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 5
MCP2036
2.0
PIN DESCRIPTION
Descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
2.1
Chip Select (CS)
The circuit is fully enabled when a logic-low is applied
to the CS input. The circuit enters in Low-Power mode
when a logic-high is applied to this input. During
Low-Power mode, the detector output voltage falls to
VREF and the supply current is reduced to 0.5 μA (typ.).
This pin has an internal pull-up resistor to ensure
proper selection of the circuit.
2.2
Voltage Reference (VREF)
VREF is a mid-scale reference output. It can source and
sink small currents and has low output impedance. A
load capacitor between 100 nF and 1 μF needs to be
located close to this pin.
2.3
Power Supply (VDD, VSS)
The VDD pin is the power supply pin for the analog and
digital circuitry within the MCP2036. This pin requires
an appropriate bypass capacitor of 100 nF. The voltage
on this pin should be maintained in the 2.7V-5.5V range
for specified operation.
The VSS pin is the ground pin and the current return
path for both analog and digital circuitry of the
MCP2036. If an analog ground plane is available, it is
recommended that this device be tied to the analog
ground plane of the PCB.
2.4
Inductor Inputs (LREF, LBTN)
These pins are inputs for the external coils (reference
and sensor). The inputs should be AC coupled to the
coils by a 10 nF ceramic capacitor.
2.5
Input Selection (REFSEL)
Digital input that is used to select between coil inputs
(reference and sensor).
2.6
Detector Isolate (ISOL)
Digital input that is used to isolate the detector circuit
while measuring the system virtual ground. Pulling the
input high disables the detector input multiplexers,
isolating the op amp circuitry from the coils inputs.
Pulling the input low reconnects the inputs for
measuring both reference and button coil inputs.
2.7
Clock (CLK)
The external clock input is used for synchronous
detection of the AC waveforms on the coils. The clock
signal is also used to generate a triangular waveform
applied to coil driver input.
Pad Name
Pin Number
I/O
Type
Description
14 Pins
16 Pins
VREF
1
16
OUT
AN
Voltage Reference
LREF
2
1
IN
AN
Reference Inductor Input
LBTN
3
2
IN
AN
Active Inductor Input
VDD
4
3
PWR
AN
Power Supply
DRVOUT
5
4
OUT
AN
Current Driver Output for Inductors
DRVIN
6
5
IN
AN
Current Driver Input
CLK
7
6
IN
CMOS
Clock Signal
REFSEL
8
7
IN
CMOS
Detector Select Input
CS
9
8
IN
CMOS
Chip Select, Active low
ISOL
10
9
IN
CMOS
Detector Isolation Control Input,
high = isolate
VSS
11
10
PWR
AN
Power Supply Return
VDETOUT
12
11
OUT
AN
Detector Output Voltage
VDET-
13
12
IN
AN
Negative Input for Output Detector
VDET+
14
13
IN
AN
Positive Input for Output Detector
NC
14
—
No connect
NC
15
—
No connect
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