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PDF ATR4262 Data sheet ( Hoja de datos )
| Número de pieza | ATR4262 | |
| Descripción | DRM And HD Radio Front-end IC | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• World Tuner Application Due to Integrated VCO Dividers
• RF Input for Weather Band Applications
• AM Reception 100 kHz Up to 30 MHz
• AM Up/Down Conversion Depending on Reception Frequency
• VCO Slave Mode for Phase Diversity Applications
• FM Image Rejection Mixer
• Selectable High-side/Low-side Injection for FM Mode
• Selectable FM Mixer Output
• RF-AGC Threshold Programmable for AM and FM
• Inband-AGC Threshold Programmable
• Cascode Control Voltage for AM FET Pre-stage
www.Da•taISnhteeegtr4aUt.ecdomPin-diode Drivers for AM and FM
• Three Selectable IF Amplifier Inputs
• Fractional PLL with Fast Lock Time
• Small Frequency Steps for AM
• Excellent SNR for DRM Applications
• Differential Reference Frequency Input for PLL Down to 9 kHz or Integrated XCO Driver
Available
• Two Wire Interface (TWI) with Two Selectable Bus Addresses
• Digital Electronic Alignment of Up to Two External Filter Stages
• Flexible and Economic IF Filter Concept
• Control Inputs for IF Gain, Reception Frequency and Keyed AGC
• Integrated State-machine for Optional Control of Alternative Frequency Check
• Only One Power Supply Voltage Necessary
Broadcast
Radio
Front-end IC for
AM/FM/DRM/HD
Radio
ATR4262
Summary
1. Description
The ATR4262 is a single-chip AM/FM and weather band tuner dedicated for digital IF
solutions in car-radio applications. ATR4262 is produced using Atmel®’s advanced
BICMOS2S technology and fulfills the automotive requirements. This part is suitable
for IBOC reception as well as for DRM solutions. The high flexibility allows to design
high performance and cost optimized tuner solutions.
Preliminary
NOTE: This is a summary document.
The complete document is available
under NDA. For more information,
please contact your local Atmel sales
office.
4994AS–AUDR–09/07
1 page  
ATR4262 [Preliminary]
6. Functional Description
The ATR4262 front end is designed for world-tuner applications. Due to its flexible divider
arrangement, the tuner can be used for reception from 100 kHz to 163 MHz. The field of use
covers all the common radio broadcast services from AM-LW to AM-SW (up to 30 MHz) and
from FM-OIRT to US weatherband. The tuner application can be easily adapted to the require-
ments of DRM and HD-radio (IBOC).
www.DataSheet4U.com
• FM section
The ATR4262 contains a high performance FM image rejection mixer, which helps to reduce
the demands and the cost of the front end application. The FM mixer output can be switched
to an alternative pair of pins to allow different IF filter concepts for FM mode. Two selectable
inputs can be used for independent FM front end sections.
• AM section
The AM section contains a dedicated AM prescaler for the LO signal. Very small tuning
steps are possible using this divider, while at the same time a high PLL comparison fre-
quency guarantees excellent phasenoise behavior.
• RF-AGC
Both AM and FM signal paths have their own RFAGCs with a wideband and a narrowband
detector with individual thresholds. The thresholds for AM and FM can be programmed in
2 dB steps. An optional keyed AGC function reduces the wideband AGC threshold up to
6 dB in order to avoid desensitization of the tuner. Pin diode drivers for AM and FM are inte-
grated to reduce cost for external components. In addition to the pin diode control, a
cascode control voltage for the external LNA is provided by the AM-AGC block.
• IF stage
The IF amplifier has three selectable inputs, which can be matched to any common IF filter
impedance by external components. With these inputs, the tuner application can be easily
adapted to different broadcast standards, while conventional standards are still possible.
Gain can be set via pins or by setting bits, which makes the ATR4262 very versatile and
easy to adapt to different baseband architectures.
• Fractional PLL
The ATR4262 contains a complete fractional PLL, which guarantees fast lock time, low
phase noise and small tuning steps. A reference clock frequency from 9 kHz up to 21 MHz
provided by, for example, baseband can be used. Alternatively the integrated XCO with
standard crystals from 10 MHz to 21 MHz can be used as the reference for the PLL.
• Double tuner concept
Like phase diversity or background tuning, double-tuner applications are also possible. For
phase diversity applications, the tuner can also operate in slave mode with a master tuner
providing the VCO frequency for both tuners.
• Digital electronic alignment
Two independent gain and offset programmable DACs are available to tune the FM front
end section. The PLL’s tuning voltage is used as input for the DACs to ensure proper track-
ing to the reception frequency. In slave mode, the tuning voltage of a master tuner must be
applied to a dedicated input pin.
4994AS–AUDR–09/07
5
5 Page 
Headquarters
Atmel Corporation
2325 Orchard Parkway
San Jose, CA 95131
USA
Tel: 1(408) 441-0311
Fax: 1(408) 487-2600
www.DataSheet4U.com
International
Atmel Asia
Room 1219
Chinachem Golden Plaza
77 Mody Road Tsimshatsui
East Kowloon
Hong Kong
Tel: (852) 2721-9778
Fax: (852) 2722-1369
Atmel Europe
Le Krebs
8, Rue Jean-Pierre Timbaud
BP 309
78054
Saint-Quentin-en-Yvelines Cedex
France
Tel: (33) 1-30-60-70-00
Fax: (33) 1-30-60-71-11
Atmel 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
Product Contact
Web Site
www.atmel.com
Literature Requests
www.atmel.com/literature
Technical Support
Sales Contact
www.atmel.com/contacts
Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any
intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI-
TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY
WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDEN-
TAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF
THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no
representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications
and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided
otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use
as components in applications intended to support or sustain life.
© 2007 Atmel Corporation. All rights reserved. Atmel®, logo and combinations thereof, and others are registered trademarks or trademarks of
Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others.
4994AS–AUDR–09/07
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| PDF Descargar | [ Datasheet ATR4262.PDF ] | |
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