T2803

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 T2803 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 Gaussian data filter for TX. No mechanical tuning is necessary in production. www.DataSheet4U.com Figure 1-1. 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 IF AMP 1 DEMOD IF_TANK IF AMP 2 BB_OUT TANK CF VCO TX/RX SWITCH GF TX_DATA PC TX_OUT TX DRIVER f :n PD 3-WIRE BUS CLOCK DATA ENABLE VCO REG AUX REG CP RC f :n CTRL LOGIC RX_ON TX_ON PU_RX/TX PU_PLL VREG_VCO VS_VCO VREG VS_REG OLE GND_VCO PU_REG REG_CTRL VTUNE CP I_CPSW LD REF_CLK Rev. 45...