MICRF102 Ver la hoja de datos (PDF) - Micrel
Número de pieza
componentes Descripción
Fabricante
MICRF102 Datasheet PDF : 12 Pages
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MICRF102
Micrel
Parameter
Digital / Control Section
Calibration Time
Power Amplifier Output Hold Off
Time from STBY
Transmitter Stabilization Time
from STBY
Maximum Data Rate
– ASK modulation
VSTBY
Enable voltage
STBY Sink Current
ASK pin
ASK input current
Condition
Note 9, ASK data rate 20kbps
Note 10, STDBY transition from LOW to HIGH
Crystal, ESR < 20Ω
From External Reference (500mVpp)
Crystal, ESR < 20Ω
Duty cycle of the modulating signal = 50%
ISTBY = VDD
VIH, input high voltage
VIL, input low voltage
ASK = 0V, 5.0V input current
Min Typ Max Unit
25
ms
6
ms
10
ms
19
ms
20
kbits/s
0.75VDD 0.6VDD
V
5
6.5
µA
0.8VDD
V
0.2VDD V
–10 0.1
10
µA
Note 9. When the device is first powered up or it loses power momentarily, it goes into the calibration mode to tune up the transmit antenna.
Note 10. After the release of the STDBY, the device requires an initialization time to settle the REFOSC and the internal PLL. The first MARK state
(ASK HIGH) after exit from STDBY needs to be longer than the initialization time. After that, highs and lows in the ASK pin callibrates the
output RF stage. See Figures 2, 3, and 4.
+5VSW
R1
100k
R3
100k
+5VTX
R2
6.8k
C1
0.1µF
16V
C4
100pF
50V
C5
4.7µF
6.3V
MICRF102
PC
VDD
ASK
ANTP
VSS
ANTN
REFOSC STBY
Data
C2
8.2pF 50V
(4.7pF 50V)
C3
12pF 50V
(2.7pF 50V)
L1
pcbant
REFOSC
C6 (np)
4.7µF
6.3V
Y1
9.84375MHz
(13.560MHz)
+5VSW
R4
(np)
Figure 1.
+5VTX
R5
0Ω
Frequency Antenna Height Azimuth
(MHz) Polarity (meters) (0-360)
434.03
V
2.5
140
EMI Meter Duty Cycle Corrected
Reading Correction Reading
(dBµV/m) (dB) (dBµV/m)
64.2
5.4
58.8
Corrected 15:231b Limit
Reading (dBµV/m)
(µV/m)
871.00
80.8
Margin
(dB)
22
868.5
V
1
150
53.1
5.4
47.7
242.70
60.8
33.1
434.03
H
1
150
76.1
5.4
70.7
3427.80
80.8
10.1
868.5
H
1.5
295
60.1
5.4
54.7
543.30
60.8
26.1
1302
V
1
195
41.1
5.4
35.7
61.00
54
18.3
1736
V
1
280
51.3
5.4
45.9
197.20
60.8
14.9
1302
H
2.5
110
49.4
5.4
44
158.50
54
10
1736
H
1
113
44.5
5.4
39.2
91.20
60.8
21.6
Note. Higher order harmonics were found to be below the noise floor of the receiving system for testing.
Table 1. Transmitted Power Measurement with Transmitted Frequency 433.92MHz, FCC Limits and Compliance
MICRF102
4
December 2006
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