Datasheet > AD8372

AD8372

更新时间： 2024-01-10 06:45:13

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	722K
描述
41 dB Range, 1 dB Step Size, Programmable Dual VGA

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AD8372 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：	QFN
包装说明：	HVQCCN, LCC32,.2SQ,20	针数：	32
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.31.00.01	风险等级：	5.29
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	S-XQCC-N32
JESD-609代码：	e3	长度：	5 mm
湿度敏感等级：	3	功能数量：	1
端子数量：	32	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	UNSPECIFIED
封装代码：	HVQCCN	封装等效代码：	LCC32,.2SQ,20
封装形状：	SQUARE	封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：	260	电源：	5 V
认证状态：	Not Qualified	座面最大高度：	1 mm
子类别：	Other Analog ICs	最大供电电流 (Isup)：	270 mA
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	4.5 V
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
技术：	BICMOS	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	NO LEAD
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：	5 mm

AD8372 数据手册

41 dB Range, 1 dB Step Size,

Programmable Dual VGA

AD8372

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Dual independent digitally controlled VGA

Differential input and output

ENB1

IPC1

REF2

OPC1

AD8372

150 Ω differential input

INC1

ONC1

RXT2

Open-collector differential output

7.8 dB noise figure to 100 MHz @ maximum gain

HD2/HD3 better than 77 dBc for 1 V p-p differential output

−3 dB bandwidth of 150 MHz

RXT2

CHANNEL 1

POSTAMP

CLK1

SDO1

SDI1

CLK2

SDO2

SDI2

REGISTERS

AND

GAIN DECODER

LCH1

41 dB gain range

LCH2

1 dB step size 0.2 dB

Serial 8-bit bidirectional SPI control interface

Wide input dynamic range

Pin-programmable output stage

Power-down feature

Single 5 V supply: 106 mA per channel

32-lead LFCSP, 5 mm × 5 mm package

OPC2

ONC2

ENB2

IPC2

INC2

CHANNEL 2

POSTAMP

REF1

Figure 1.

APPLICATIONS

Differential ADC drivers

CMTS upstream direct sampling receivers

CATV modem signal scaling

Generic RF/IF gain stages

Single-ended-to-differential conversion

GENERAL DESCRIPTION

The AD8372 is a dual, digitally controlled, variable gain

amplifier that provides precise gain control, high IP3, and

low noise figure. The excellent distortion performance and

moderate signal bandwidth make the AD8372 a suitable

gain control device for a variety of multichannel receiver

applications.

setting resistors can be adjusted to manipulate the gain and

distortion performance of each channel. This is a flexible

feature in applications where it is desirable to trade off distortion

performance for lower power consumption.

The AD8372 is powered on by applying the appropriate logic

level to the ENB1, ENB2 pins. When powered down, the AD8372

consumes less than 2.6 mA and offers excellent input-to-output

isolation. The gain setting is preserved when powered down.

For wide input dynamic range applications, the AD8372

provides a broad 41 dB gain range. The gain is programmed

through a bidirectional 4-pin serial interface. The serial inter-

face consists of a clock, latch, data input, and data output lines

for each channel.

Fabricated on an Analog Devices high frequency BiCMOS

process, the AD8372 provides precise gain adjustment capabilities

with good distortion performance. The quiescent current of the

AD8372 is typically 106 mA per channel. The AD8372 amplifier

comes in a compact, thermally enhanced 5 mm × 5 mm 32-lead

LFCSP package and operates over the temperature range of

−40°C to +85°C.

The AD8372 provides the ability to set the transconductance of

the output stage using a single external resistor. The RXT1 and

RXT2 pins provide a band gap derived stable reference voltage

of 1.56 V. Typically 2.0 kΩ shunt resistors to ground are used to

set the maximum gain to a nominal value of 31 dB. The current

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, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks arethe property of their respective owners.

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

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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