T2803_05 Datasheet, PDF (1/28 Pages) ATMEL Corporation – 2.4 GHZ WDECT/ISM SINGLE CHIP TRANSCEIVER

Features
• Supply-voltage Range 3V to 4.6V (Regulated)
• Auxiliary Voltage Regulator On-chip (3.2V to 4.6V)
• Low Current Consumption
• Few Low-cost External Components
• No Mechanical Tuning Required
• Supports Multiple Reference Clocks (10.368 MHz/13.824 MHz)
• Fast Settling Synthesizer (864 kHz Channel Spacing)
• TX Preamplifier with 3 dBm Output Power at 2.45 GHz
(4 Programmable Power Levels)
• Ramp-signal Generator for Power Ramping and Power Control of
External SiGe Power Amplifier (T7024 and T7026)
Electrostatic sensitive device.
Observe precautions for handling.
2.4 GHz
WDECT/ISM
Single-chip
Transceiver
1. Description
The T2803 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 and Gaus-
sian data filter for TX. No mechanical tuning is necessary in production.
Figure 1-1. Block Diagram
MIXER
OUT IF_IN
IF_TANK
IR MIXER
IF AMP 1
IF AMP 2
RF_IN
RAMP_OUT
RAMP_SET
RAMP
GEN
RAMP
D/A
RSSI
DEMOD
TANK
CF
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
T2803
VREG_VCO VS_VCO
VREG VS_REG
OLE
GND_VCO PU_REG REG_CTRL VTUNE
CP
LD
I_CPSW
REF_CLK
Rev. 4572I–DECT–07/05