ATR2808_06 Datasheet, PDF (1/3 Pages) ATMEL Corporation – 2.9/5.8 GHz WDCET/ISM Single-chip Transceiver

Features
• Fully Integrated TX/RX with 2.9 GHz TX VCO for 5.8 GHz Applications Using a
Frequency Doubler
• Supply Voltage Range 3.4V to 4.6V
• 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
2.9/5.8 GHz
WDCET/ISM
Single-chip
Transceiver
ATR2808
1. 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 1-1. Block Diagram
MIXER
OUT ^IF_IN
IF_TANK
DEMOD
TANK
CF
IR MIXER
IF AMP 1
IF AMP 2
RF_IN
RAMP_OUT
RAMP_SET
RAMP
GEN
RAMP
D/A
RSSI
DEMOD
BB FILTER
D/A _{DEMOD DAC}
TX / RX
SWITCH
VCO
GF
BB_OUT
RSSI
TX_DATA
TX_OUT
PC
PD
f
:n
TX DRIVER
VCO
REG
CP
AUX
REG
3-WIRE
BUS
RC
f
:n
CTRL
LOGIC
CLOCK
DATA
ENABLE
RX_ON
TX_ON
PU_RX/TX
PU_PLL
Summary
VREG_VCO
VS_VCO
VREG VS_REG
OLE
GND_VCO PU_REG REG_CTRL VTUNE
CP
LD
I_CPSW
REF_CLK
Rev. 4693ES–DECT–03/06
Note: This is a summary document. A complete document
is available under NDA. For more information, please con-
tact your local Atmel sales office.