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AD8331ARQ-REEL7 PDF预览

AD8331ARQ-REEL7

更新时间: 2024-02-19 05:53:10
品牌 Logo 应用领域
亚德诺 - ADI 消费电路商用集成电路放大器光电二极管
页数 文件大小 规格书
32页 482K
描述
Ultralow Noise VGAs with Preamplifier and Programmable RIN

AD8331ARQ-REEL7 技术参数

是否Rohs认证:不符合生命周期:Obsolete
零件包装代码:SSOP包装说明:MO-137AD, QSOP-20
针数:20Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.33.00.01
风险等级:5.04Is Samacsys:N
商用集成电路类型:CONSUMER CIRCUITJESD-30 代码:R-PDSO-G20
JESD-609代码:e0长度:8.66 mm
湿度敏感等级:1功能数量:1
端子数量:20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:SSOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, SHRINK PITCH峰值回流温度(摄氏度):240
认证状态:Not Qualified座面最大高度:1.75 mm
最大供电电压 (Vsup):5.5 V最小供电电压 (Vsup):4.5 V
表面贴装:YES温度等级:INDUSTRIAL
端子面层:Tin/Lead (Sn85Pb15)端子形式:GULL WING
端子节距:0.635 mm端子位置:DUAL
处于峰值回流温度下的最长时间:30宽度:3.91 mm
Base Number Matches:1

AD8331ARQ-REEL7 数据手册

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Ultralow Noise VGAs with  
Preamplifier and Programmable RIN  
AD8331/AD8332  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
LON1 LOP1  
25 24  
VIP1 VIN1  
22 21  
VPSV  
15  
VCM1  
20  
VCM2  
9
HILO  
19  
Ultralow noise preamplifier  
VPS1  
26  
23  
Voltage noise = 0.74 nV/√Hz  
Current noise = 2.5 pA/√Hz  
V
MID  
COM1  
3.5dB/15.5dB  
[(–48 to 0) + 21] dB  
+19dB  
3 dB bandwidth: 120 MHz  
17 VOH1  
16 VOL1  
+
INH1 27  
POST  
AMP1  
VGA 1  
Low power: 125 mW/channel  
Wide gain range with programmable postamp  
–4.5 dB to +43.5 dB  
LNA 1  
28  
LMD1  
+
BIAS  
(V  
BIAS AND  
INTERPOLATOR  
GAIN  
INT  
10 GAIN  
13 VOL2  
)
MID  
+7.5 dB to +55.5 dB  
+
1
LMD2  
Low output-referred noise: 48 nV/√Hz typical  
Active input impedance matching  
Optimized for 10-/12-bit ADCs  
Selectable output clamping level  
Single 5 V supply operation  
POST  
AMP2  
VGA 2  
LNA 2  
+
2
3
INH2  
12  
VOH2  
VPS2  
CLAMP  
COM2  
6
4
5
7
8
14  
18  
11  
LON2 LOP2  
VIP2 VIN2  
COMM  
ENB  
RCLMP  
Available in space-saving chip scale package  
Figure 1. AD8332 Shown 28-Lead TSSOP  
APPLICATIONS  
50  
40  
V
= 1V  
GAIN  
Ultrasound and sonar time-gain control  
High performance AGC systems  
I/Q signal processing  
0.8V  
30  
0.6V  
High speed dual ADC driver  
20  
0.4V  
0.2V  
GENERAL DESCRIPTION  
10  
The AD8331/AD8332 are single- and dual-channel ultralow  
noise, linear-in-dB, variable gain amplifiers. Although optimized  
for ultrasound systems, they are usable as low noise variable  
gain elements at frequencies up to 120 MHz.  
0
0V  
–10  
–20  
100k  
1M  
10M  
FREQUENCY (Hz)  
100M  
1G  
Each channel consists of an ultralow noise preamplifier (LNA),  
an X-AMP® VGA with 48 dB of gain range, and a selectable gain  
postamplifier with adjustable output limiting. The LNA gain is  
19 dB with a single-ended input and differential outputs capable  
of accurate, programmable active input impedance matching by  
selecting an external feedback resistor. Active impedance  
control optimizes noise performance for applications that  
benefit from input matching.  
Figure 2. Frequency Response vs. Gain  
The VGA’s low output-referred noise is advantageous in driving  
high speed differential ADCs. The gain of the postamplifier may  
be pin selected to 3.5 dB or 15.5 dB to optimize gain range and  
output noise for 12-bit or 10-bit converter applications. The  
output may be limited to a user-selected clamping level,  
preventing input overload to a subsequent ADC. An external  
resistor adjusts the clamping level.  
The 48 dB gain range of the VGA makes these devices suitable  
for a variety of applications. Excellent bandwidth uniformity is  
maintained across the entire range. The gain control interface  
provides precise linear-in-dB scaling of 50 dB/V for control  
voltages between 40 mV and 1 V. Factory trim ensures excellent  
part-to-part and channel-to-channel gain matching. Differential  
signal paths lead to superb second and third order distortion  
performance and low crosstalk.  
The operating temperature range is –40°C to +85°. The  
AD8331 is available in a 20-lead QSOP package, and the  
AD8332 in 28-lead TSSOP and 32-lead LFCSP packages. They  
require a single 5 V supply, and the quiescent power  
consumption is 125 mW/ch. A power-down (enable) pin is  
provided.  
Rev. C  
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  
registered trademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.326.8703  
www.analog.com  
© 2003 Analog Devices, Inc. All rights reserved.  
 

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