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WE2408 Datasheet Preview

WE2408 Datasheet

2.4GHz Single Chip FM Transceiver

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WiNEDGEwww.DataSheet4U.com & WiRELESS
Winceiver WE2408
2.4GHz Single Chip FM Transceiver
FEATURES
x 2.4GHz Operating Frequency
x 2.7 - 3.3V Operation
x -2 dBm Tx Output Power
x -99 dBm Rx Sensitivity
x Full Duplex
x Dual VCO
x FM/FSK Modulator
x No Tuning "Tankless" FM Demodulator
x Direct-Conversion, Zero-IF Architecture
x Low External Component Count
x Serial Programming Interface
x Low Standby Current
x Thin-Quad Flat Package (TQFP-48)
DESCRIPTION
WE2408 are single-chip FM/FSK transceiver ICs operate in 2.4GHz ISM band. Utilizing a unique
direct-conversion, zero-intermediate frequency (zero-IF) receiver architecture, WE2408 provides radio
designers a high performance RF transceiver solution with low external component count and small
PCB footprint.
The receiver section of the WE2408 provides all of the required receiver functions including local
oscillator synthesis (VCO), down-conversion, filtering, automatic gain control (AGC), automatic
frequency control (AFC), FM/FSK demodulator and RSSI functions.
The transmitter section contains a directly modulated VCO and RF power amplifier (PA).
Internal, dual, high-performance phase locked loop (PLL) synthesizers/VCOs allow full duplex or half-
duplex operation over the entire RF tuning range. Tuning, power management, and gain control
(manual) functions are accomplished via serial interface.
APPLICATIONS
x 2.4G Wireless Voice/Data Products
x 2.4GHz Cordless Phones
x AMR/Telemetry/Data Radios
Winceiver and WE2408 are trademarks of WiNEDGE & WiRELESS Pte Ltd
WiNEDGE & WiRELESS PTE LTD
TECHplace 1, Blk 4010, #04-12, Ang Mo Kio Ave 10, Singapore 569626
Tel: (65) 6455 4371 Fax: (65) 6455 6811
Email: sales@winedge.com.sg
Website: www.winedge.com




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WE2408 Datasheet Preview

WE2408 Datasheet

2.4GHz Single Chip FM Transceiver

No Preview Available !

WiNEDGE & WiRELESS
www.DataSheet4U.com
TABLE OF CONTENT
Winceiver WE2408
2.4GHz Single Chip FM Transceiver
SIMPIFIED 2.4GHZ APPLICATION CIRCUIT...................................................................................... 3
BLOCK DIAGRAM................................................................................................................................ 4
PIN CONFIGURATION ........................................................................................................................ 4
PIN DESCRIPTIONS............................................................................................................................ 5
FUNCTIONAL DESCRIPTION ............................................................................................................. 6
ZERO IF RECEIVER.............................................................................................................................. 6
TRANSMITTER...................................................................................................................................... 8
REFERENCE OSCILLATOR ................................................................................................................. 9
OPERATION LIMITS.......................................................................................................................... 10
ELECTRICAL SPECIFICATIONS ...................................................................................................... 10
RECEIVER BANDWIDTH ADJUSTMENT ......................................................................................... 15
BASEBAND FILTERS BANDWIDTH ................................................................................................... 15
DEMODULATOR BANDWIDTH........................................................................................................... 16
IF FILTER BANDWIDTH...................................................................................................................... 17
RSSI ................................................................................................................................................... 17
RSSI TOLERANCE .............................................................................................................................. 17
METHODS OF CORRECTING RSSI TOLERANCE ............................................................................ 17
RSSI SETTLING TIME ......................................................................................................................... 18
RX/TX RESPONSE TIME .................................................................................................................. 18
RX/TX PLL LOCK TIME ....................................................................................................................... 18
RECEIVER ATTACK TIME .................................................................................................................. 19
FM MODULATION ............................................................................................................................. 20
FM DEVIATION.................................................................................................................................... 20
FM MODULATOR ................................................................................................................................ 20
AUTOMATIC FREQUENCY CONTROL (AFC) ................................................................................. 22
AFC CORRECTION RANGE ............................................................................................................... 23
SWITCHING AFC ON AND OFF DURING OPERATION .................................................................... 24
CRYSTAL TUNING WITH AFC............................................................................................................ 24
WORKING CONDITIONS FOR AFC ................................................................................................... 24
AFC NOISE.......................................................................................................................................... 24
AFC RESPONSE TIME........................................................................................................................ 24
SERIAL PROGRAMMING INTERFACE ............................................................................................ 25
TIMING DIAGRAM ............................................................................................................................... 25
REFERENCE FREQUENCY REGISTER .......................................................................................... 26
RECEIVE FREQUENCY REGISTER ................................................................................................. 27
TRANSMIT FREQUENCY REGISTER .............................................................................................. 28
MODE REGISTER ............................................................................................................................. 29
RX GAIN CONTROL (BIT 3, 10-15, 18-19).......................................................................................... 29
AGC GAIN RESET DISABLE............................................................................................................... 31
CHARGE PUMP CURRENT AND POLARITY (BIT 6-9) ...................................................................... 31
ANALOG VS DIGITAL OUTPUT (BIT 17) ............................................................................................ 31
OTHER OPERATION MODES (BIT 18-22).......................................................................................... 32
PROGRAMMING EXAMPLES ............................................................................................................. 33
CIRCUIT DESIGN CONSIDERATIONS............................................................................................. 33
PACKAGE INFORMATION ................................................................................................................ 34
REVISION HISTORY.......................................................................................................................... 35
ORDERING INFORMATION .............................................................................................................. 36
© 2003 WiNEDGE & WiRELESS PTE LTD
Rev Date: 2003 May 23
Page 2


Part Number WE2408
Description 2.4GHz Single Chip FM Transceiver
Maker ETC
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