ATR4262M1

更新时间： 2024-02-09 15:29:32

品牌	Logo	应用领域
爱特美尔 - ATMEL		无线
页数	文件大小	规格书
12页	221K
描述
Broadcast Radio Front-end IC for AM/FM/DRM/HD Radio

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ATR4262M1 技术参数

生命周期：	Obsolete	零件包装代码：	QFN
包装说明：	HVQCCN,	针数：	48
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.83	Is Samacsys：	N
JESD-30 代码：	S-XQCC-N48	长度：	7 mm
功能数量：	1	端子数量：	48
最高工作温度：	90 °C	最低工作温度：	-40 °C
封装主体材料：	UNSPECIFIED	封装代码：	HVQCCN
封装形状：	SQUARE	封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
认证状态：	Not Qualified	座面最大高度：	1 mm
表面贴装：	YES	技术：	BICMOS
电信集成电路类型：	TELECOM CIRCUIT	温度等级：	INDUSTRIAL
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	QUAD	宽度：	7 mm
Base Number Matches：	1

ATR4262M1 数据手册

ATR4262M1 [Preliminary]

6. Functional Description

The ATR4262M1 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).

• FM section

The ATR4262M1 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 inband detec-

tor 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 integrated 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 ATR4262M1 very versatile and

easy to adapt to different baseband architectures.

• Fractional PLL

The ATR4262M1 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.

4994BS–AUDR–05/08

1 2 3 456 7 8...12

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