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ATR2732 Datasheet

  • ATR2732

  • Integrated DAB One-chip Front End

  • 14頁

  • ATMEL   ATMEL

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Features
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Highly Integrated DAB Front-end Solution Covering Band III and L-band Reception
Convenient Internal Clock Generation, Single Reference Clock
Fractional PLL for VHF
Fully Integrated VCOs
High-precision Digitally Tunable Reference Oscillator
Integrated High-performance LNAs
Very Flexible Programming of the AGC
Automatically Aligned External Filter Tuning
Simple Three-wire Digital Control Interface for Easy Handling
Single Low Voltage (3.3V) Supply Operation
Low Current Consumption Due to Several Power-down Options
Small SMD Package (QFN 9 mm
脳
9 mm)
Integrated DAB
One-chip Front
End
ATR2732
Preliminary
Summary
Applications
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Commercial DAB Receivers
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DAB Receiver Solutions for Car Radio Applications
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Portable DAB Solutions
1. Description
The ATR2732 is a front-end monolithic integrated circuit, manufactured using Atmel鈥檚
silicon-germanium BiCMOS process (SiGMOS).
The ATR2732 carries out all functions of RF and IF processing, as well as the
clock-signal generation for these functions. Therefore, there is an integrated fractional
PLL, which, equivalent to most of the other functions, can be controlled via an external
digital bus. The RF functions include LNA, down-conversion mixing, amplifying, detec-
tion, and gain control. An external SAW filter is required in the signal path after the RF
functions. Additional amplifiers with detection and control functions are integrated IF
functions.
The device offers several tuning support functions, and was created to simplify the
design and manufacturing process. To this end, the number of external components
are minimal.
The part fits perfectly to Atmel鈥檚 DAB baseband processor ATR2740.
Figure 1-1.
Block Diagram
Gain
cntl
Vtune
gen.
A
D
RSSI
PWR
cntl
Control unit
VCO
L-band
PLL
VHF
frac. PLL
SPI interface
NOTE:
This is a summary document.
The complete document is available
under NDA. For more information,
please contact your local Atmel sales
office.
VCO
4918AS鈥揇AB鈥?3/06

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