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Few Low-cost External Components
Electrostatic sensitive device.
Observe precautions for handling.
2.4 GHz
WDECT/ISM
Single-chip
Transceiver
T2802
Preliminary
Description
The T2802 is an RF IC for low-power applications in the 2.45 GHz ISM band. The
QFN48-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, TX filter
and modulation compensation circuit for advanced closed-loop modulation concept.
No mechanical tuning is necessary in production.
Figure 1.
Block Diagram
MIXER
OUT IF_IN
IR MIXER
RF_IN
DEMOD
BB FILTER
RAMP_OUT
RAMP_SET
RAMP
GEN
RAMP
D/A
D/A
RSSI
DEMOD DAC
RSSI
DEMOD
IF_TANK
IF AMP 1
IF AMP 2
BB_OUT
TANK
CF
VCO
TX/RX
SWITCH
GF
TX_DATA
CLOCK
PC
TX_OUT
TX DRIVER
CP
RC
f
:n
CTRL
LOGIC
f
:n
RX_ON
TX_ON
PU_RX/TX
PU_PLL
PD
MCC
3-WIRE
BUS
DATA
ENABLE
PU_VCO
VCO
REG
AUX
REG
VREG_VCO
VS_VCO
VREG
VS_REG VTUNE
GND_VCO
PU_REG REG_CTRL
CP
I_CPSW
LD
REF_CLK
Rev. 4509F鈥揇ECT鈥?0/03