参数资料
型号: MAX7036EVKIT-433+
厂商: Maxim Integrated
文件页数: 11/13页
文件大小: 0K
描述: EVAL KIT MAX7036
标准包装: 1
系列: *
300MHz to 450MHz ASK Receiver
with Internal IF Filter
times larger than the resistor in the RC smoothing cir-
cuit between DSP and DSN. This circuit will provide an
instantaneous jump of one-half of the DSP increase
from “no signal” voltage to peak voltage, which then
decays with the same time constant as that of the
threshold build-up from the RC smoothing circuit. The
DC slicing voltage at DSN is slightly higher (by the ratio
of the two resistors in the circuit) than it would be with-
out the speed-up circuit. Always provide a capacitive
path from the PDOUT pin to ground when using the
peak-detector output.
Keeping the traces short also reduces parasitic induc-
tance. Generally, 1in of a PCB trace adds about 20nH
of parasitic inductance. The parasitic inductance can
have a dramatic effect on the effective inductance of a
passive component. For example, a 0.5in trace con-
necting a 100nH inductor adds an extra 10nH of induc-
tance or 10%.
To reduce the parasitic inductance, use wider traces
and a solid ground or power plane below the signal
traces. Also, use low-inductance connections to ground
on all GND pins, and place decoupling capacitors
close to all power-supply connections.
MAX7036
DATA
FILTER
Table 2. Component Values
COMPONENT
C1
f RF = 315MHz
4.7pF
f RF = 433.92MHz
2.7pF
DATA
SLICER
C2
C3
C4
100pF
100pF
0.1μF
100pF
100pF
0.1μF
20
17
16
18
C5
390pF
390pF
DSN
R1
DSP
PDOUT
C6
180pF
180pF
DATAOUT
C4
Figure 4. Using PDOUT for Faster Startup
Layout Considerations
A properly designed PCB is an essential part of any
RF/microwave circuit. On high-frequency inputs and
outputs, use controlled-impedance lines and keep them
as short as possible to minimize losses and radiation.
At high frequencies, trace lengths that are λ /10 or
longer act as antennas.
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
L1
L2
R1
Y1
1μF
0.01μF
22pF
10pF
0.1μF
220pF
10pF
10pF
100pF
0.1μF
100nH
27nH
22k Ω
9.8375MHz
1μF
0.01μF
22pF
10pF
0.1μF
220pF
10pF
10pF
100pF
0.1μF
47nH
15nH
22k Ω
13.55375MHz
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11
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