Datasheet > AD9870

AD9870

更新时间： 2024-02-14 02:48:16

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
20页	232K
描述
IF Digitizing Subsystem

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AD9870 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	QFP	包装说明：	1.40 MM HEIGHT, PLASTIC, TQFP-48
针数：	48	Reach Compliance Code：	not_compliant
HTS代码：	8542.39.00.01	风险等级：	5.91
JESD-30 代码：	S-PQFP-G48	JESD-609代码：	e0
长度：	7 mm	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）：	220	电源：	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	最大压摆率：	0.0506 mA
标称供电电压：	3.3 V	表面贴装：	YES
电信集成电路类型：	TELECOM CIRCUIT	温度等级：	INDUSTRIAL
端子面层：	Tin/Lead (Sn/Pb)	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

AD9870 数据手册

IF Digitizing Subsystem

AD9870

FEATURES

PRODUCT DESCRIPTION

10 MHz–300 MHz Input Frequency

Baseband (I/Q) Digital Output

10 kHz–150 kHz Output Signal Bandwidth

12 dB SSB NF

The AD9870 is a general-purpose IF subsystem that digitizes a

low-level 10 MHz–300 MHz IF input with a bandwidth of up to

150 kHz. The signal chain of the AD9870 consists of a low-noise

amplifier, a mixer, a variable gain amplifier with integral antialias

filter, a bandpass sigma-delta analog-to-digital converter, and a

decimation filter with programmable decimation factor. An auto-

matic gain control (AGC) circuit provides the AD9870 with

25 dB of continuous gain adjustment. The high dynamic range

of the bandpass sigma-delta converter allows the AD9870 to

cope with blocking signals that are as much as 70 dB stronger

than the desired signal. Auxiliary blocks include clock and LO

synthesizers as well as a serial peripheral interface (SPI) port.

> –1 dBm IIP3 (High IIP3 Mode)

25 dB Continuous AGC Range + 16 dB Gain Step

Support for LO and Sampling Clock Synthesis

Programmable Decimation Rate, Output Format, AAF

Cutoff, AGC and Synthesizer Settings

360 ꢂ Input Impedance

2.7 V–3.6 V Supply Voltage

Low Current: 42 mA Typ (High IIP3 Mode),

30 mA Typ (Low IIP3, Fixed Gain Mode)

48-Lead LQFP Package (1.4 mm Thick)

The SPI port programs numerous parameters of the AD9870,

including the synthesizer divide ratios, the AGC attack and decay

times, the AGC target signal level, the decimation factor, the

output data format, the 16 dB attenuator, and the bias currents of

several blocks. Reducing bias currents allows the user to reduce

power consumption at the expense of reduced performance.

APPLICATIONS

Portable and Mobile Radio Products

Digital UHF/VHF FDMA Products

TETRA

FUNCTIONAL BLOCK DIAGRAM

AGC

DAC

AD9870

–16dB

VGA/

AAF

DECIMATION

FILTER

ꢀ-ꢁ ADC

DOUTA

DOUTB

FORMATTING/SSI

LNA

IFIN

= 18MHz

CLK

CLKOUT

FREF

CONTROL LOGIC

SYNTH

SAMP CLOCK

SYNTHESIZER

VOLTAGE

REFERENCE

SPI

LO VCO AND

LOOP FILTER

CLK VCO AND

LOOP FILTER

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

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