ATR2808

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 Summary 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, TXwww.DataSheet4U.com preamplifier, power-ramping generator for power amplifiers, integrated synthesizer, fully integrated VCO and gaussian data filter for TX. Figure 1-1. Block Diagram MIXER IF_IN OUT IR MIXER RF_IN DEMOD BB FILTER RAMP_OUT RAMP_SET RAMP GEN RAMP D/A D/A RSSI DEMOD DAC RSSI GF TX_DATA DEMOD IF_TANK IF AMP 1 IF AMP 2 BB_OUT TANK CF VCO TX / RX SWITCH PC TX_OUT f :n TX DRIVER 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. 4693ES–DECT–03/06 Note: This...