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Features
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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)
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Three DACs for Software Controlled Tuner Alignment
Low-power Consumption
High Signal to Noise Ratio (SNR)
Integrated Band Gap – Only One Supply Voltage Necessary
Frequency
Synthesizer for
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.
Radio Tuning
ATR4256
Figure 1-1.
Block Diagram
SWO1 SWO2 SWO3 SWO4
7
8
9
10
Tuning
OSCIN
OSCOUT
13
12
Oscillator
Switching outputs
DAC3
3-bit
5
DAC3
MX2LO
15
OSC
buffer
V Ref
CLK
DATA
EN
17
16
18
3-wire
bus
interface
DAC2
DAC1
4
3
DAC2
DAC1
R-
divider
DAC
AM/FM
VRef
FMOSCIN
19
FM-
preamp
N-
divider
Phase
detector
Current
sources
1
PDO
Band gap
2
PD
20
GNDAN
V5
14
11
GND
VS
6
4867D–AUDR–01/08
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相关代理商/技术参数
ATR4258 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AM/FM RECEIVER IC
ATR4258_05 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AM/FM Receiver IC
ATR4258-ILQH 功能描述:射频接收器 COM.RADIO - AM/FM RECEIVER RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel
ATR4258-ILQH 19 制造商:Atmel Corporation 功能描述:COM.RADIO - AM/FM RECEIVER
ATR4258-ILQH 19 功能描述:IC RCVR AM/FM 3WIRE BUS 44SSOP RoHS:是 类别:RF/IF 和 RFID >> RF 接收器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 09/Jan/2012 标准包装:50 系列:* 频率:850MHz ~ 2.175GHz 灵敏度:- 数据传输率 - 最大:- 调制或协议:- 应用:* 电流 - 接收:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 特点:- 电源电压:4.75 V ~ 5.25 V 工作温度:0°C ~ 85°C 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘
ATR4258-ILQH19 功能描述:射频接收器 COM.RADIO - AM/FM Receiver RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel
ATR4258-ILSH 功能描述:射频接收器 COM.RADIO - AM/FM RECEIVER RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel
ATR4258-ILSH 19 功能描述:IC RCVR AM/FM 3WIRE BUS 44SSOP RoHS:是 类别:RF/IF 和 RFID >> RF 接收器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 09/Jan/2012 标准包装:50 系列:* 频率:850MHz ~ 2.175GHz 灵敏度:- 数据传输率 - 最大:- 调制或协议:- 应用:* 电流 - 接收:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 特点:- 电源电压:4.75 V ~ 5.25 V 工作温度:0°C ~ 85°C 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘