ATR2730 Datasheet | Atmel

Features - - - - - - - - - - - - .. Supply Voltage: 8.5V RF Frequency Range: 1400 MHz to 1550 MHz IF Frequency Range: 150 MHz to 250 MHz Enhanced IM3 Rejection Overall Gain Control Range: 30 d B Typically DSB Noise Figure: 10 d B Gain-controlled Amplifier and L-band Mixer Power-down Function for the Analog Part On-chip Gain-control Circuitry On-chip VCO, Typical Frequency 1261.568 MHz Internal VCO Can Be Overdriven by an External LO On-chip Frequency Synthesizer - Fixed LO Divider Factor: 2464 - Nine Selectable Reference Divider Factors: 32, 33, 35, 36, 48, 49, 63, 64, 65 - A Reference Oscillator (Can Be Overdriven by an External Reference Signal) - Tri-state Phase Detector with Programmable Charge Pump - Programmable Deactivation of Tuning Output - Lock-status Indication - Test Interface L-band Down-converter for DAB Receivers ATR2730 Preliminary 1. Description The ATR2730 is a monolithically integrated L-band down-converter circuit fabricated with Atmel®’s advanced UHF5S technology. This IC covers all functions of an L-band down-converter in a DAB receiver. The device includes a gain-controlled amplifier, a gain-controlled mixer, an output buffer, a gain control block, a power-save function for the analog part, an L-band oscillator, and a plete frequency synthesizer unit. The frequency synthesizer block consists of a reference oscillator/buffer, a reference divider, an RF divider, a tri-state phase detector, a loop filter amplifier, a lock detector, a programmable charge pump, a test interface, and a control interface. 4903C- DAB- 03/07 Figure 1-1. Block Diagram TH IF .. VCC1 VCC3 VCC4 VCC2 3 20 28 9 6, 7, 8, 21, 22, 23, 24 18 Internal 5V supply voltage for frequency synthesizer Voltage stabilizer 14 ∆U Analog part 26 25 5 VCO 4 Power save (analog part) Reference counter : Nref RF counter : 2464 Tristate phase detector Bandgap Lock detector PLCK RF NRF 20 kΩ 12 TANK VREF Charge pump 200/300 13 Lock detector Test interface 1 15 16 11...