Datasheet > AD9874ABSTRL

AD9874ABSTRL

更新时间： 2024-02-01 15:55:05

品牌	Logo	应用领域
亚德诺 - ADI		电信信息通信管理电信集成电路
页数	文件大小	规格书
41页	747K
描述
Low Power IF Digitizing Subsystem

阅读下载

中文翻译

获取价格

技术参数
数据手册
替代型号

如果您发现信息不准确，欢迎纠错

AD9874ABSTRL 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	QFP
包装说明：	LFQFP, QFP48,.35SQ,20	针数：	48
Reach Compliance Code：	compliant	ECCN代码：	5A991.B.7
HTS代码：	8542.39.00.01	风险等级：	0.63
JESD-30 代码：	S-PQFP-G48	JESD-609代码：	e3
长度：	7 mm	湿度敏感等级：	3
功能数量：	1	端子数量：	48
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	LFQFP
封装等效代码：	QFP48,.35SQ,20	封装形状：	SQUARE
封装形式：	FLATPACK, LOW PROFILE, FINE PITCH	峰值回流温度（摄氏度）：	260
电源：	3/3.3,3/5 V	认证状态：	Not Qualified
座面最大高度：	1.6 mm	子类别：	Other Telecom ICs
标称供电电压：	3 V	表面贴装：	YES
技术：	BICMOS	电信集成电路类型：	TELECOM CIRCUIT
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	30
宽度：	7 mm	Base Number Matches：	1

AD9874ABSTRL 数据手册

AD9874

DEFINITION OF SPECIFICATIONS/TEST METHODS

Dynamic Range (DR)

Dynamic range is the measure of a small target input signal

(P_TARGET) in the presence of a large unwanted interferer signal

(P_INTER). Typically, the large signal will cause some unwanted

characteristic of the component or system to degrade, thus

making it unable to detect the smaller target signal correctly. In

the case of the AD9874, it is often a degradation in noise figure

at increased VGA attenuation settings that limits its dynamic

range (refer to TPCs 15a, 15b, and 15c).

Single-Sideband Noise Figure (SSB NF)

Noise figure (NF) is defined as the degradation in SNR perfor-

mance (in dB) of an IF input signal after it passes through a

component or system. It can be expressed with the equation

Noise Figure = 10 × log(SNR_INSNR_OUT

)

The term SSB is applicable for heterodyne systems containing a

mixer. It indicates that the desired signal spectrum resides on

only one side of the LO frequency (i.e., single sideband); thus a

“noiseless” mixer has a noise figure of 3 dB.

The test method for the AD9874 is as follows. The small target

signal (an unmodulated carrier) is input at the center of the IF

frequency, and its power level (P_TARGET) is adjusted to achieve an

SNR_TARGETof 6 dB. The power of the signal is then increased by

3 dB prior to injecting the interferer signal. The offset frequency

of the interferer signal is selected so that aliases produced by

the decimation filter’s response as well as phase noise from the LO

(due to reciprocal mixing) do not fall back within the measurement

bandwidth. For this reason, an offset of 110 kHz was selected.

The interferer signal (also an unmodulated carrier) is then

injected into the input and its power level is increased to the

point (P_INTER) where the target signal SNR is reduced to 6 dB.

The dynamic range is determined with the equation:

The AD9874’s SSB noise figure is determined by the equation

SSB NF = P_IN− 10 × log BW −174 dBm Hz − SNR

(

)

}

{

where P_INis the input power of an unmodulated carrier, BW is

the noise measurement bandwidth, –174 dBm/Hz is the thermal

noise floor at 293 K, and SNR is the measured signal-to-noise

ratio in dB of the AD9874.

Note that P_INis set to –85 dBm to minimize any degradation in

measured SNR due to phase noise from the RF and LO signal

generators. The IF frequency, CLK frequency, and decimation

factors are selected to minimize any spurious components

falling within the measurement bandwidth. Note also that a

bandwidth of 10 kHz is used for the data sheet specification.

Refer to Figures 22a and 22b for an indication of how NF varies

with BW. Also, refer to the TPCs to see how NF is affected by

different operating conditions. All references to noise figures

within this data sheet imply single-sideband noise figure.

DR = P

– P

+ SNR_TARGET

INTER

TARGET

Note that the AD9874’s AGC is enabled for this test.

IF Input Clip Point

The IF input clip point is defined as 2 dB below the input power

level (P_IN), resulting in the clipping of the AD9874’s ADC.

Unlike other linear components that typically exhibit a soft

compression (characterized by its 1 dB compression point), an

ADC exhibits a hard compression once its input signal exceeds

its rated maximum input signal range. In the case of the AD9874,

which contains a ꢀ-ꢁ ADC, hard compression should be avoided

because it causes severe SNR degradation.

Input Third Order Intercept (IIP3)

IIP3 is a figure of merit used to determine a component’s or

system’s susceptibility to intermodulation distortion (IMD)

from its third order nonlinearities. Two unmodulated carriers at

a specified frequency relationship (f₁and f₂) are injected into a

nonlinear system exhibiting third order nonlinearities producing

IMD components at 2f₁– f₂and 2f₂– f₁. IIP3 graphically repre-

sents the extrapolated intersection of the carrier’s input power

with the third order IMD component when plotted in dB. The

difference in power (D in dBc) between the two carriers and the

resulting third order IMD components can be determined from

the equation

D = 2 ×(IIP3 – P

)

REV. A

–7–

1...5 6 789 10 11...41

中文翻译

下载PDF

AD9874ABSTRL 替代型号

型号	品牌	替代类型	描述	数据表
AD9874ABST	ADI	类似代替	IF Digitizing Subsystem

与AD9874ABSTRL相关器件

型号	品牌	获取价格	描述	数据表
AD9874ABSTZ	ADI	获取价格	IF Digitizing Subsystem
AD9874ABSTZRL	ADI	获取价格	IC SPECIALTY TELECOM CIRCUIT, PQFP48, PLASTIC, MS-026BBC, LQFP-48, Telecom IC:Other
AD9874BST	ADI	获取价格	IF Digitizing Subsystem
AD9874BSTZ	ADI	获取价格	IC SPECIALTY TELECOM CIRCUIT, PQFP48, PLASTIC, MS-026BBC, LQFP-48, Telecom IC:Other
AD9874EB	ADI	获取价格	IF Digitizing Subsystem
AD9874-EB	ADI	获取价格	IF Digitizing Subsystem
AD9875	ADI	获取价格	Broadband Modem Mixed-Signal Front End
AD9875BST	ADI	获取价格	Broadband Modem Mixed-Signal Front End
AD9875BSTRL	ADI	获取价格	Broadband Modem Mixed-Signal Front End
AD9875BSTZ	ADI	获取价格	IC SPECIALTY TELECOM CIRCUIT, PQFP48, LQFP-48, Telecom IC:Other

与AD9874ABSTRL相关文章

压敏电阻器在直流电路中的过压保护应用探讨
2024-06-07

4
电感耐压值及其与电感大小的关系
2024-06-07

11
CNY17F光耦合器：特性、应用、封装、引脚功能及替换型号解析
2024-06-07

8
DS1307资料解析：特性、引脚说明、替代推荐
2024-06-07

6

产品中心

服务支持

精选活动

关于我们

帮助中心

AD9874ABSTRL

AD9874ABSTRL 技术参数

AD9874ABSTRL 数据手册

AD9874ABSTRL 替代型号

与AD9874ABSTRL相关器件

与AD9874ABSTRL相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

AD9874ABSTRL

AD9874ABSTRL 技术参数

AD9874ABSTRL 数据手册

AD9874ABSTRL 替代型号

与AD9874ABSTRL相关器件

与AD9874ABSTRL相关文章

您还可以找

您在本页遇到什么问题？