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ATR2731

ATMEL Corporation
Part Number ATR2731
Manufacturer ATMEL Corporation
Description DAB One-chip Front End
Published Jan 22, 2009
Detailed Description www.DataSheet4U.com Features • • • • • • • • • • • • • • • • • • • • • • • • • • • • 8.5V Supply Voltage Voltage Regula...
Datasheet PDF File ATR2731 PDF File

ATR2731
ATR2731

Overview
www.
DataSheet4U.
com 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 1.
Description www.
DataSheet4U.
com The ATR2731 is a monolithically integrated Digital Audio Broadcasting one-chip front-end circuit manufactured using Atmel’s advanced UHF5S technology.
Its functionality covers a gain-controlled RF amplifier with two selectable RF inputs, a gain-controlled RF mixer, a VCO which provides the LO signal for the RF mixers, either directly or after passing a frequency divider, a SAW filter driver, an AGC block for the RF section, a gain-controlled IF amplifier, an IF mixer which can also be bypassed, an AGC block for the IF section, and a fractional-N ...


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