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What is LT8900?

This electronic component, produced by the manufacturer "ETC", performs the same function as "Low Cost 2.4GHz Radio Transceiver".


LT8900 Datasheet PDF - ETC

Part Number LT8900
Description Low Cost 2.4GHz Radio Transceiver
Manufacturers ETC 
Logo ETC Logo 


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LT8900 Datasheet Revision 1.2
LT8900
Low Cost 2.4GHz Radio Transceiver
FEATURES
GENERAL DESCRIPTION
z Complete 2.4 GHz radio transceiver includes
fully integrated RF PLL and channel filtering
z Supports Frequency-Hopping Spread
Spectrum
z Supports SPI and I2C bus interface
z Built-in smart auto-acknowledge Tx/Rx
protocol simplifies usage
z Packet data rate 1 Mbps over-the-air
z FIFO flag signal permits continuous streaming
data at 1 Mbps over-the-air
z Power management for minimizing current
consumption
z Digital readout of RSSI and temperature
z Lead-free 4x4mm QFN Package & SOP16
for best RF performance
Application
z Remote controls
z Wireless keyboards and mice
z Proprietary Wireless Networks
z Home automation
z Commercial and industrial short-range
wireless
z Wireless voice, VoIP, Cordless headsets
z Robotics and machine connectivity
The LT8900 is a low-cost, fully
integrated CMOS RF transceiver, GFSK data
modem, and packet framer, optimized for use in the 2.4
GHz ISM band. It contains transmit, receive, RF
synthesizer, and digital modem functions, with few
external components. The transmitter supports digital
power control. The receiver utilizes extensive digital
processing for excellent overall performance, even in
the presence of interference and transmitter
impairments.
The LT8900 transmits GFSK data at approximately 1
dBm output power. The low-IF receiver architecture
produces good selectivity, with sensitivity down to
approx. -87 dBm. Digital RSSI values are available to
monitor channel quality.
On-chip transmit and receive FIFO registers are
available to buffer the data transfer with MCU.
Over-the-air data rate is always 1 Mbps even
when connected to a slow, low-cost MCU.
Built-in CRC, FEC, data whitening, and automatic
retry/acknowledge are all available to simplify and
optimize performance for individual applications.
The digital baseband interface can be either 4-wire SPI
or 2-wire I2C-bus. Three additional pins are available
for optional reset and buffer control.
For extended battery life, power consumption is
minimized all key areas. A sleep mode is available to
reduce standby current consumption to just 1 uA
typ. while preserving register settings.
This product is available in RoHS compliant 24-lead
4x4 mm JEDEC standard QFN package, featuring an
exposed pad on the bottom for best RF characteristics.
Also available in bare die form.
Free Datasheet http://www.datasheet4u.com/

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LT8900 equivalent
LT8900 Datasheet Revision 1.2
Parameter
Symbol
Receive Section
Receiver sensitivity
Maximum useable signal
Data (Symbol) rate
Min. Carrier/Interference ratio
Co-Channel Interference
Adjacent Ch. Interference,
1MHz offset
Adjacent Ch. Interference,
2MHz offset
Adjacent Ch. Interference,
3MHz offset
Out-of-Band Blocking
For additional test conditions, see
footnote1.
Ts
CI_cochannel
CI_1
CI_2
CI_3
OBB_1
OBB_2
OBB_3
OBB_4
Transmit Section
PAV
RF Output Power
Second harmonic
Third harmonic
Modulation Characteristics
Peak
FM 00001111 pattern
Deviation
01010101 pattern
In-Band Spurious Emission
2MHz offset
>3MHz offset
Out-of-Band Spurious
Emission, Operation
Note:
f1avg
f2max
IBS_2
IBS_3
OBS_O_1
OBS_O_2
OBS_O_3
OBS_O_4
MIN
-20
-10
-27
-27
-10
-17
TYP
MAX Unis Test Condition and Notes
Measured using 50 Ohm balun. For
BER 0.1%:
-87 dBm FEC off.
1 dBm
1 us
For BER 0.1%
+9 dB -60 dBm desired signal.
+6 dB -60 dBm desired signal.
-12 dB -60 dBm desired signal.
-24 dB -67 dBm desired signal.
dBm
dBm
dBm
dBm
30 MHz
2000 MHz
2000 MHz
2400 MHz
2500 MHz
3000 MHz
3000 MHz
12.75 GHz
to
to
to
to
Meas. with ACX
BF2520 ceramic filter
2 on ant. pin .
Desired sig. -67
dBm, BER 0.1%.
Measured using 50 Ohm balun3:
6
POUT= maximum output power
Reg09=0x4000
2
dBm
POUT = nominal output power,
Reg09=0x1840
POUT=minimum
output
power,Reg09=1FC0
-50 dBm Conducted to ANT pin.
-50 dBm Conducted to ANT pin.
280 kHz
225 kHz
-40 dBm
-60 dBm
< -60 -36 dBm 30 MHz ~ 1 GHz
-45
-30
dBm
1 GHz ~ 12.75 GHz, excludes desired
signal and harmonics.
< -60 -47 dBm 1.8 GHz ~ 1.9 GHz
< -65 -47 dBm 5.15 GHz ~ 5.3 GHz
1. The test is run at one midband frequency, typically 2460 MHz. With blocking frequency swept in 1 MHz steps, up to 24 exception
frequencies are allowed. Of these, no more than 5 shall persist with blocking signal reduced to -50dBm. For blocking
frequencies below desired receive frequency, in-band harmonics of the out-of-band blocking signal are the most frequent cause
of failure, so be sure blocking signal has adequate harmonic filtering.
2. In some applications, this filter may be incorporated into the antenna, or be approximated by the effective antenna bandwidth.
3. Transmit power measurement is corrected for insertion loss of Balun, in order to indicate the transmit power at the IC pins.
Page 5
December
2010
Free Datasheet http://www.datasheet4u.com/


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1. Low Cost 2.4GHz Radio Transceiver

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LT8900The function is Low Cost 2.4GHz Radio Transceiver. ETCETC

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