MICRF505BML datasheet(19/27 Pages) MICREL

tên linh kiện	MICRF505BML

Giải thích chi tiết về linh kiện	868MHz and 915MHz ISM Band Transceiver

PDF	27 Pages

Scroll/Zoom	100%

nhà sản xuất	MICREL [Micrel Semiconductor]

Trang chủ	http://www.micrel.com

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19 / 27 page

May 13, 2004

M9999-051304

MICRF505

Micrel

RSSI

A6..A0

0000001

Modulation1 Modulation0

"0"

RSSI_en

LD_en

PF_FC1

PF_FC0

0,5

1,5

2,5

-110

-100

-90

-80

-70

-60

-50

-40

(dBm)

RSSI

Figure 12. RSSI Voltage

C10

1nF

33k

Pin 14

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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