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MICRF505BML 데이터시트(PDF) 19 Page - Micrel Semiconductor

부품명 MICRF505BML
상세설명  868MHz and 915MHz ISM Band Transceiver
PDF  27 Pages
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제조업체  MICREL [Micrel Semiconductor]
홈페이지  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MICRF505BML 데이터시트(HTML) 19 Page - Micrel Semiconductor

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May 13, 2004
19
M9999-051304
MICRF505
Micrel
RSSI
A6..A0
D7
D6
D5
D4
D3
D2
D1
D0
0000001
Modulation1 Modulation0
"0"
"0"
RSSI_en
LD_en
PF_FC1
PF_FC0
0
0,5
1
1,5
2
2,5
-110
-100
-90
-80
-70
-60
-50
-40
Pin
Pin
(dBm)
(dBm)
RSSI
Figure 12. RSSI Voltage
C10
1nF
R2
33k
Pin 14
RSSI
RSSI
Figure 13. RSSI Network
A typical plot of the RSSI voltage as function of input power
is shown in Figure 9. The RSSI has a dynamic range of about
50dB from about -110dBm to -60dBm input power.
The RSSI can be used as a signal presence indicator. When
a RF signal is received, the RSSI output increases. This could
be used to wake up circuitry that is normally in a sleep mode
configuration to conserve battery life.
Another application for which the RSSI could be used is to
determine if transmit power can be reduced in a system. If the
RSSI detects a strong signal, it could tell the transmitter to
reduce the transmit power to reduce current consumption.



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