DataSheetWiki


ATR4256 fiches techniques PDF

ATMEL Corporation - Frequency Synthesizer

Numéro de référence ATR4256
Description Frequency Synthesizer
Fabricant ATMEL Corporation 
Logo ATMEL Corporation 





1 Page

No Preview Available !





ATR4256 fiche technique
Features
Reference Oscillator up to 15 MHz (Tuned)
Oscillator Buffer Output (for AM Up/Down Conversion)
Two Programmable 16-bit Dividers
Fine-tuning Steps Possible
Fast Response Time Due to Integrated Loop Push-pull Stage
3-wire Bus (Enable, Clock and Data; 3V and 5V Microcontrollers Acceptable)
Four Programmable Switching Outputs (Open Drain)
Three DACs for Software Controlled Tuner Alignment
Low-power Consumption
High Signal to Noise Ratio (SNR)
Integrated Band Gap – Only One Supply Voltage Necessary
1. Description
The ATR4256 is a synthesizer IC for FM receivers and an AM up-conversion system
in BiCMOS technology. Together with the AM/FM IC ATR4258 or ATR4255, it com-
prises a complete AM/FM car radio front-end, which is also recommended for RDS
(Radio Data System) applications. It is controlled by a 3-wire bus and also contains
switches and Digital to Analog Converters (DACs) for software-controlled alignment of
the AM/FM tuner. The ATR4256 is the pin-compatible successor IC of U4256BM-R.
Figure 1-1. Block Diagram
Tuning
SWO1 SWO2 SWO3 SWO4
7 8 9 10
13
OSCIN
12 Oscillator
OSCOUT
15
MX2LO
OSC
buffer
17
CLK
16
3-wire
DATA
bus
EN 18 interface
Switching outputs
DAC3
3-bit
VRef
DAC2
DAC1
5
DAC3
4
DAC2
3
DAC1
R-
divider
DAC
AM/FM
VRef
19
FMOSCIN
FM-
preamp
20
GNDAN
N-
divider
Phase
detector
Band gap
14
V5
Current
sources
11
GND
6
VS
1
PDO
2
PD
www.DataSheet4U.com
Frequency
Synthesizer for
Radio Tuning
ATR4256
4867D–AUDR–01/08

PagesPages 21
Télécharger [ ATR4256 ]


Fiche technique recommandé

No Description détaillée Fabricant
ATR4251 High-dynamic-range Antenna Amplifier IC ATMEL Corporation
ATMEL Corporation
ATR4252 All-in-One IC Solution ATMEL Corporation
ATMEL Corporation
ATR4255 AM/FM RECEIVER IC ATMEL Corporation
ATMEL Corporation
ATR4256 Frequency Synthesizer ATMEL Corporation
ATMEL Corporation

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche