Rev. 4693DS–DECT–08/04
2.9/5.8 GHz
WDCET/ISM
Single-chip
Transceiver
ATR2808
Summary
Preliminary
Features
Fully Integrated TX/RX with 2.9 GHz TX VCO for 5.8 GHz Applications Using a
Frequency Doubler
Supply Voltage Range 3.4 V to 4.6 V
TX Preamplifier with 0 dBm Output Power at 2.9 GHz
Ramp-signal Generator for Power Ramping and Power Control of External SiGe Power
Amplifier
Fast Settling Synthesizer (1.728 MHz Channel Spacing at 5.8 GHz)
Supports Multiple Reference Clocks (10.368 MHz/13.824 MHz)
Benefits
Extended Battery Operating Time
Low Current Consumption
Very Small 7 × 7 mm Package
Few Low Cost External Components
No Mechanical Tuning Required
Electrostatic sensitive device.
Observe precautions for handling.
Description
The ATR2808 is an RF IC for low-power applications in the 5.8 GHz ISM band. The
QFN 48-packaged IC is a complete transceiver including image rejection mixer, IF
amplifier, FM demodulator, baseband filter, RSSI, TX preamplifier, power-ramping
generator for power amplifiers, integrated synthesizer, fully integrated VCO and gaus-
sian data filter for TX.
Figure 1. Block Diagram
TANK
PC
RC
GF
CP
VCO
f
: n
f
: n
CTRL
LOGIC
PD
TX / RX
SWITCH
IR MIXER IF AMP 1 IF AMP 2
DEMOD
BB FILTER
3-WIRE
BUS
DEMOD DAC
RSSI
TX DRIVER
CLOCK
DATA
ENABLE
RX_ON
TX_ON
PU_RX/TX
PU_PLL
TX_DATA
RSSI
BB_OUT
CF
DEMOD
IF_TANKIF_IN
MIXER
OUT
RF_IN
TX_OUT
VS_VCO CP LD REF_CLK
VTUNE
VREG VS_REG
REG_CTRL
VREG_VCO
VCO
REG
RAMP
GEN
RAMP_OUT
RAMP_SET
AUX
REG
OLE
PU_REGGND_VCO
D/A
I_CPSW
RAMP
D/A
Note: This is a summary document. A complete document
is available under NDA. For more information, please con-
tact your local Atmel sales office.