|
|
PDF ATR2733 Data sheet ( Hoja de datos )
| Número de pieza | ATR2733 | |
| Descripción | Integrated DAB One-chip Front End | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ATR2733 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
Features
• Highly Integrated DAB Front-end Solution Covering Band III Reception
• Convenient Internal Clock Generation, Single Reference Clock
• Fractional PLL for VHF
• Fully Integrated VCO
• High-precision Digitally Tunable Reference Oscillator
• Integrated High-performance LNA
• 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 7 mm × 7 mm)
Applications
• Commercial DAB Receivers
• DAB Receiver Solutions for Car Radio Applications
• Portable DAB Solutions
1. Description
The ATR2733 is a front-end monolithic integrated circuit, manufactured using Atmel’s
silicon-germanium BiCMOS process (SiGMOS).
The ATR2733 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’s DAB baseband processor ATR2740.
Figure 1-1. Block Diagram
www.DataSheet4U.com
Integrated DAB
One-chip Front
End
ATR2733
Preliminary
VCO
Gain
Cntl
Vtune
Gen.
VHF
Frac.PLL
A
AD
RSSI
PWR
Cntl
Control Unit
NOTE: This is a summary document.
The complete document is available
under NDA. For more information,
please contact your local Atmel sales
office.
4926AS–DAB–04/06
1 page  
ATR2733 [Preliminary]
3.2 AGC in General
www.DataShe
There are three AGCs in the ATR2733, one for the RF signals (3), one for the very beginning of
the IF path (mainly VHF mixer), and one for the IF amplifiers (5) down to the output to baseband
(7).
In these AGCs, the output signals of the relevant blocks are amplified, weakly band-pass fil-
tered, rectified, and, finally, low-pass filtered. The voltage derived in this power-measurement
process is compared to a voltage threshold which can be digitally controlled by several bits,
independently of each other. The setting is done via the control bus. Depending on the result of
this comparison, charge pumps feed a positive or negative current in order to charge or dis-
charge external capacitors. The voltage of these external capacitors is used to control the gains
of practically all blocks in the signal path.
By means of the control bus, the current of the AGC charge pump can be selected as specified
in the following table:
Table 3-1.
MSB
0
0
0
0
1
1
1
1
Selection of Time Constant Factor
LSB
Time Constant Factor
0 0 Infinite
0 1 32
1 0 16
1 18
0 04
0 12
1 01
1 1 0.2
The input pin WAGC, set to logical 1, always sets all AGCs to time constant Infinite (meaning
there is practically no current to the AGC capacitors), regardless of the actual status of the bus
settings.
4926AS–DAB–04/06
5
5 Page 
8. Ordering Information
Extended Type Number
ATR2733-PLQW
ATR2733-PLPW
9. Package Information
Package
QFN48
QFN48
Package: VQFN_7 x 7_48L
Exposed pad 5.1 x 5.1
Dimensions in mm
Not indicated tolerances ±0.05
48
1
Pin 1 identification
Top
ATR2733 [Preliminary]
www.DataSheet4U.com
Remarks
7 mm × 7 mm, 0.5 mm pitch, lead-free
7 mm × 7 mm, 0.5 mm pitch, lead-free
37
36
Bottom
5.1±0.15
48
1
12
7 0.2
0.9±0.1
Drawing-No.: 6.543-5112.01-4
Issue: 1; 8.02.06
Z 10:1
0.23±0.07
25
24
Z
12
13
0.5 nom.
5.5
technical drawings
according to DIN
specifications
4926AS–DAB–04/06
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ATR2733.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ATR2730 | L-band Down-converter | ATMEL Corporation |
| ATR2731 | DAB One-chip Front End | ATMEL Corporation |
| ATR2732 | Integrated DAB One-chip Front End | ATMEL Corporation |
| ATR2732N1 | Integrated DAB One-chip Front End | ATMEL Corporation |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |