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AT48810-CH 데이터시트 PDF




ATMEL Corporation에서 제조한 전자 부품 AT48810-CH은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 AT48810-CH 기능
기능 900 MHz Spread- Spectrum RF Module
제조업체 ATMEL Corporation
로고 ATMEL Corporation 로고


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AT48810-CH 데이터시트, 핀배열, 회로
Features
Designed for use with Atmel’s AT48802 Spread-Spectrum Signal Processor
FCC Part 15, Unlicensed Operation
RF Despreading and Narrowband IF for Highest Jamming Margin
•• 1 mW Narrowband Operation, or 1 and 50 mW Spread-Spectrum Operation
AT48810
Description
The AT48810 RF module is intended for time domain duplex spread-spectrum com-
munications under FCC Part 15, 902-928 MHz unlicensed operations. This module
features RF despreading and narrowband IF for powerful interference rejection.
Spreading is via direct sequence. The unit can also be operated in a narrow-band
configuration (FCC limits power to 1 mW in narrow band) by restricting the DC voltage
to the power amplifier so that the transmit power is less than 0 dBm per FCC regula-
tions. The unit can also be run in slow half duplex or simplex mode.
900 MHz
Spread-
Spectrum RF
Module
Pin Diagram
15.36 MHz Clock Out
Ground
VCC
Synthesizer Data Clock Input
Synthesizer Data Input
Synthesizer Data Latch Input
Modulation Input
No Connection
PN Spreading Enable Input
PN Input
12
34
56
78
9 10
11 12
13 14
15 16
17 18
19 20
Audio Out
Ground
RSSI Out
T/R Switch
LNA Gain Hi/Low
VCC
No Connection
Transmit Power On/Off Input
Power Amp VCC Input
Power Amp VCC Input
Note: 1. Connector on module is Dupont/Berg part number 87814-610.
Mating connector is 87409-110.
Preliminary
0625A
3-1




AT48810-CH pdf, 반도체, 판매, 대치품
Transmit Power
Power Output
On/Off Control
+17 dBm at VCC = 5.0 VDC,
VPA = 4.0 VDC
TX PWR input pin 16, CMOS
compatible, low = power on
RF power amp VCC is on a separate pin
from the other circuits VCC.
Receive
Sensitivity
IF Bandwidth
Signal-to-Noise
Post Detection Net Bandwidth
RSSI Output
Attenuators
Audio Output
Interface Rejection
-105 dBm max. at 12 dB SINAD (C-weighted)
30 kHz at -3 dB nominal
30 dB min. C-weighted at -80 dBm
15 kHz, limited by IF filter
Log compressed. Slope 0.24 uA/dB nominal into a zero ohm load. Rout =
58K nominal. Bandwidth 15 kHz, limited by IF filter. Noise floor - 110 dBm
equivalent input.
T/R switch T gives 35 dB nominal, low = transmit. GAIN control gives
17 dB nominal in LNA low = high gain. (binary controls: on/off only, CMOS
compatible.)
Sensitivity 0.4 uA/kHz nominal into a zero ohm load. Rout = 58K nominal.
This output must be lowpass filtered (-3 dB at 200 Hz, 6 dB/octave) to give
net link frequency response which is flat.
Out of Band
Antenna filter is -6 dB at fo ±32.5 MHz and approx. -30 dB at fo ±100 MHz.
A cellular phone with 1 watt power at a distance of 5 feet produces no
noticeable SNR degradation in the receiver for the mating transmitter at a
distance of 10 feet, running spread spectrum R13 code.
In Band
Processing gain depends on code length. The use of RF despreading
assures that the high processing gain can be maximally effective by
allowing narrow IF bandwidth thus significantly reducing IF jamming
induced desensitization.
Clock Output
15.360 MHz buffered from TCXO, CMOS compatible, one
standard load.
Data Port
SPI/3-wire, 3 lines. Synthesizer device is National Semi-
conductor LMX1501 or equal.
3-4 AT48810

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