Tranceptores Fsk

TRF6903 SINGLE CHIP MULTIBAND RF TRANSCEIVER
SWRS022D − MARCH 2004 − REVISED JUNE 2005

D Single-Chip RF Transceiver for 315-MHz, D D D D D D D
433-MHz, 868-MHz, and 915-MHz Industrial, Scientific, and Medical (ISM) Bands 2.2-V to 3.6-V Operation Low Power Consumption FSK/OOK Operation Integer-N Synthesizer With Fully Integrated Voltage Controlled Oscillator (VCO) On-Chip Reference Oscillatorand Phase-Locked Loop (PLL) Power Amplifier With 8-dBm Typical Output Power Programmable Brownout Detector
10.7 MHz Ceramic or Discrete IF Filter Ceramic Discriminator

D Clock Recovery With Integrated Data Bit D D D D D D D D
Synchronizer and Baud Rate Selection Linear Receive Strength Signal Indicator (RSSI) Flexible 3-Wire Serial Interface Minimal Number of External Components Required48-Pin Low-Profile Plastic Quad Flat Package (PQFP) Programmable XTAL Trimming Lock Detect Indicator Programmable Training Sequence Recognition Pin Compatible to the TRF6901

47

43, 44

CER_DIS 35

37

36

39 LEARN/HOLD

MIX_OUT

IF_IN1, IF_IN2

SLC_CAP

LPF_OUT

LPF_IN

34

RX_DATA DCLK

33 27 41 23 18

1 LNA_IN1 2 45 LNA_IN2 DET_OUT

RSSI_OUT RX_FLAG

TRF6903CLOCK

DATA 20 STROBE 19

4

STDBY 26 PA_OUT VCO_TUNE XTAL_SW CP_OUT MODE LOCK_DETECT TX_DATA 21 22 32

13

15

30

XTAL

31

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the gates.

Please be aware that an important notice concerningavailability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of allparameters.

Copyright  2005, Texas Instruments Incorporated

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

1

TRF6903 SINGLE CHIP MULTIBAND RF TRANSCEIVER
SWRS022D − MARCH 2004 − REVISED JUNE 2005

48 47 46 45 44 43 42 41 40 39 38 37

GND RSSI_OUT DEM_VCC LEARN/HOLD DEM_GND LPF_IN

PQFP PACKAGE (TOP VIEW)

MIX_VCC MIX_OUT MIX_GND DET_OUT IF_IN1 IF_IN2

LNA_IN1 LNA_IN2 LNA_VCCPA_OUT PA_GND1 PA_VCC PA_GND2 VCO_GND1 VCO_VCC VCO_VCC2 VCO_BYPASS VCO_GND2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

36 35 34 33 32 31 30 29 28 27 26 25

LPF_OUT CER_DIS SLC_CAP RX_DATA TX_DATA XTAL_SW XTAL XTAL_VCC DGND DCLK STDBY NC

description
The TRF6903 single-chip solution is an integrated circuit intended for use as a low-cost multiband FSK or OOK transceiverto establish a frequency-programmable, half-duplex, bidirectional RF link. The multichannel transceiver is intended for digital (FSK, OOK) modulated applications in the North American and European 315-MHz, 433-MHz, 868-MHz, and 915-MHz ISM bands. The single-chip transceiver operates down to 2.2 V and is designed for low power consumption. The synthesizer has a typical channel spacing of better than200 kHz and features a fully-integrated VCO. Only the PLL loop filter is external to the device. Two fully-programmable operation modes, Mode0 and Mode1, allow extremely fast switching between two preprogrammed settings (for example, receive (RX)/transmit (TX); TX_frequency_0/TX_frequency_1; RX_frequency_0/RX_frequency_1; …) without reprogramming the device. ISM band standards Europe has assignedan unlicensed frequency band of 868 MHz to 870 MHz. This band is specifically defined for short range devices with duty cycles from 0.1% to 100% in several subbands. The new European frequency band, due to the duty cycle assignment, allows a reliable RF link and makes many new applications possible. The North American unlicensed ISM band covers 902 MHz to 928 MHz (center frequency of 915 MHz),...