U2731B-NFN

U2731B-NFN Datasheet

U2731B

Part	Datasheet
U2731B-NFN	U2731B-NFN (pdf)

Related Parts	Information
U2731B-NFNG1	U2731B-NFNG1

PDF Datasheet Preview
• V Supply Voltage • Voltage Regulator for Stable Operating Conditions • Microprocessor-controlled Via a Simple Two-wire Bus • Two Addresses Selectable • 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 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 • Tristate Phase Detector with Programmable Charge Pump • Superior Phase-noise Performance • Deactivation of Tuning Output Programmable • Three Switching Outputs Open Collector • Three D/A Converters Resolution 8 Bits • Lock Status Indication Open Collector Electrostatic sensitive device. Observe precautions for handling. DAB One-chip Front End U2731B The U2731B 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 frequency synthesizer. The frequency synthesizer controls the VCO to synthesize frequencies in the range of 70 MHz to 500 MHz in a 16-kHz raster within certain limits the reference divider factor is fully programmable. The lock status of the phase detector is indicated at a special output pin three switching outputs can be addressed. A reference signal which is generated by an on-chip reference oscillator is available at an output pin. This reference signal is also used to generate the LO signal for the IF mixer, either by doubling the frequency or by using the reference frequency itself. Three D/A converters at a resolution of 8 bits provide a digitally controllable output voltage. The thresholds inside the AGC blocks can be digitally controlled by means of on-chip 4-bit D/A converters. All functions of this IC are controlled via a simple two-wire bus. Figure Block Diagram SAW1 SAW2 IFIN1 IFIN2 CPIF 16 CPRF 12 RFA1 13 RFA2 14 RFB1 15 RFB2 C1VCO 32 33 B2VCO B1VCO 35 C2VCO th1 V AGC V AGC x1/x2 4-bit latch 4-bit latch 4-bit latch 4-bit latch 26 IF AGCIN2 27 IF AGCIN1 WAGC 29 IFOUT 20, 25, 38 VS 10, 11, 17, 30, 31,36, 37 GND 42 OSCI 43 OSCO 5 FREF Reference counter Tristate phase detector Lock detector Programmable charge pump Ordering Information Extended Type Number Package Information Package SSO44 Dimensions in mm Package SSO44 Remarks Tube Taped and reeled technical drawings according to DIN specifications 24 U2731B Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel 41 26-426-5555 Fax 41 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel 852 2721-9778 Fax 852 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel 81 3-3523-3551 Fax 81 3-3523-7581 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel 33 2-40-18-18-18 Fax 33 2-40-18-19-60 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France Tel 33 4-42-53-60-00 Fax 33 4-42-53-60-01 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel 44 1355-803-000 Fax 44 1355-242-743 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel 49 71-31-67-0 Fax 49 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759 Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel 33 4-76-58-30-00 Fax 33 4-76-58-34-80 Literature Requests Disclaimer Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. Atmel Corporation All rights reserved. and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be the trademarks of others. Printed on recycled paper.

PDF Datasheet Preview

• V Supply Voltage
• Voltage Regulator for Stable Operating Conditions
• Microprocessor-controlled Via a Simple Two-wire Bus
• Two Addresses Selectable
• 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 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
• Tristate Phase Detector with Programmable Charge Pump
• Superior Phase-noise Performance
• Deactivation of Tuning Output Programmable
• Three Switching Outputs Open Collector
• Three D/A Converters Resolution 8 Bits
• Lock Status Indication Open Collector

Electrostatic sensitive device. Observe precautions for handling.

DAB One-chip Front End

U2731B

The U2731B 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 frequency synthesizer. The frequency synthesizer controls the VCO to synthesize frequencies in the range of 70 MHz to 500 MHz in a 16-kHz raster within certain limits the reference divider factor is fully programmable. The lock status of the phase detector is indicated at a special output pin three switching outputs can be addressed. A reference signal which is generated by an on-chip reference oscillator is available at an output pin. This reference signal is also used to generate the LO signal for the IF mixer, either by doubling the frequency or by using the reference frequency itself. Three D/A converters at a resolution of 8 bits provide a digitally controllable output voltage. The thresholds inside the AGC blocks can be digitally controlled by means of on-chip 4-bit D/A converters. All functions of this IC are controlled via a simple two-wire bus.

Figure Block Diagram

SAW1 SAW2

IFIN1 IFIN2 CPIF
16 CPRF
12 RFA1
13 RFA2
14 RFB1
15 RFB2

C1VCO
32 33

B2VCO

B1VCO 35

C2VCO
th1 V AGC

V AGC
x1/x2
4-bit latch
4-bit latch
4-bit latch
4-bit latch
26 IF AGCIN2
27 IF

AGCIN1

WAGC
29 IFOUT
20, 25, 38 VS
10, 11, 17, 30, 31,36, 37 GND
42 OSCI
43 OSCO
5 FREF

Reference counter

Tristate phase detector

Lock detector

Programmable charge pump
Ordering Information

Extended Type Number

Package Information

Package SSO44

Dimensions in mm

Package SSO44

Remarks Tube Taped and reeled
technical drawings according to DIN specifications
24 U2731B

Atmel Corporation
2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 487-2600

Regional Headquarters

Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel 41 26-426-5555 Fax 41 26-426-5500

Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel 852 2721-9778 Fax 852 2722-1369

Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel 81 3-3523-3551 Fax 81 3-3523-7581

Atmel Operations

Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314

Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314

La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel 33 2-40-18-18-18 Fax 33 2-40-18-19-60

ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France Tel 33 4-42-53-60-00 Fax 33 4-42-53-60-01
1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759

Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel 44 1355-803-000 Fax 44 1355-242-743

RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel 49 71-31-67-0 Fax 49 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759

Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom

Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel 33 4-76-58-30-00 Fax 33 4-76-58-34-80

Literature Requests

Disclaimer Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems.

Atmel Corporation All rights reserved. and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be the trademarks of others.

Printed on recycled paper.

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Datasheet ID: U2731B-NFN 519467