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ATR0797 Dataheets PDF



Part Number ATR0797
Manufacturers ATMEL Corporation
Logo ATMEL Corporation
Description 65-300 MHZ SIGE IF RECEIVER DEMODULATOR
Datasheet ATR0797 DatasheetATR0797 Datasheet (PDF)

www.DataSheet4U.com Features • • • • Gain Control in 20-dB Steps Very Low I/Q Amplitude and Phase Errors High Input P1dB Small and Optimized Package for High Reliability and Performance Applications • Infrastructure Digital Communication Systems • GSM/Cellular Transceivers • ISM Band Transceivers Benefits • Fully Integrated Device with Reduced External Component Count 65 - 300 MHz SiGe IF Receiver/ Demodulator ATR0797 Electrostatic sensitive device. Observe precautions for handling. Descri.

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www.DataSheet4U.com Features • • • • Gain Control in 20-dB Steps Very Low I/Q Amplitude and Phase Errors High Input P1dB Small and Optimized Package for High Reliability and Performance Applications • Infrastructure Digital Communication Systems • GSM/Cellular Transceivers • ISM Band Transceivers Benefits • Fully Integrated Device with Reduced External Component Count 65 - 300 MHz SiGe IF Receiver/ Demodulator ATR0797 Electrostatic sensitive device. Observe precautions for handling. Description The ATR0797 is a multi-purpose demodulator RFIC. The silicon monolithic integrated circuit is designed with Atmel’s advanced SiGe technology. This demodulator is capable of both quadrature demodulation or direct IF output. Features include switchable gain control on a frequency range from 65 MHz to 300 MHz. The device performs a very low amplitude as well as phase error and allows high input P1dB. The ATR0797 targets a variety of system applications for communications including 3G wireless. Figure 1. Block Diagram GC1 5 GC2 4 2 1 BBIP BBIN IFP IFN 8 9 ϕ 16 15 13 12 BBQP BBQN LOP LON Rev. 4665D–SIGE–08/04 DataSheet 4 U .com www.DataSheet4U.com Pin Configuration Figure 2. Pinning BBIN BBIP VCC GC2 GC1 GND VCC IFP 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 BBQP BBQN VCC LOP LON GND VCC IFN Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol BBIN BBIP VCC GC2 GC1 GND VCC IFP IFN VCC GND LON LOP VCC BBQN BBQP Function Baseband I-axis negative output, self biasing Baseband I-axis positive output, self biasing 5 V power supply Gain control input, stage 2, 5 V CMOS levels Gain control input, stage 1, 5 V CMOS levels Ground 5 V power supply IF positive input, self biasing, AC-coupled IF negative input, self biasing, AC-coupled 5 V power supply Ground Local oscillator, negative input, self biasing, AC-coupled Local oscillator, positive input, self biasing, AC-coupled 5 V power supply Baseband Q-axis negative output, self biasing Baseband Q-axis positive output, self biasing 2 ATR0797 4665D–SIGE–08/04 DataSheet 4 U .com www.DataSheet4U.com ATR0797 Product Description Atmel’s ATR0797 is a variable gain I-Q demodulator designed for use in receiver IF sections, that are typically existing in superheterodyne RF architectures. The ATR0797 has two gain stages that are independent of each other. These gain stages are broadband differential amplifiers each with a digital control pin to set the gain. Since the amplifiers have approximately the same gain, setting GC1 high and GC2 low results in approximately the same gain as setting GC1 low and GC2 high. Former setting offers better noise figures. The IF input is a differential input that has internal bias circuitry to set the common mode voltage. The use of blocking capacitors to facilitate AC coupling is highly recommended to avoid changing the common mode voltage. Either input may be driven single ended if the other input is connected to ground through an AC short such as a 1000 pF capacitor.


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