ATR2731 Datasheet, PDF (1/26 Pages) ATMEL Corporation – DAB One-chip Front End

Features
• 8.5V Supply Voltage
• Voltage Regulator for Stable Operating Conditions
• Microprocessor-controlled Via a Simple Two-wire Bus
• Two Selectable Addresses
• Gain-controlled RF Amplifier with Two Inputs, Selectable Via a Simple Two-wire Bus
Control
• Balanced RF Amplifier Inputs
• Gain-controlled RF Mixer
• Four-pin Voltage-controlled Oscillator
• SAW Filter Driver With Differential Low-impedance Output
• AGC Voltage Generation for RF Section, Available at Charge-pump Output (Can Also
Be Used to Control a PIN Diode Attenuator)
• Gain-controlled IF Amplifier
• Balanced IF Amplifier Inputs
• Selectable Gain-controlled IF Mixer
• Single-ended IF Output
• AGC Voltage Generation for IF Section, Available at Charge-pump Output
• Separate Differential Input for the IF AGC Block
• All AGC Time Constants are Adjustable
• AGC Thresholds Programmable Via a Simple Two-wire Bus
• Three AGC Charge Pump Currents Selectable (Zero, Low, High)
• Reference Oscillator
• Programmable 9-bit Reference Divider
• Programmable 15-bit Counter 1:2048 to 1:32767 Effectively
• Tri-state Phase Detector with Programmable Charge Pump
• Superior Phase-noise Performance
• Programmable Deactivation of Tuning Output
• Three Switching Outputs (Open Collector)
• Three D/A Converters (Resolution: 8 Bits)
• Lock Status Indication (Open Collector)
DAB One-chip
Front End
ATR2731
Rev. 4904A–DAB–03/06