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AD630AR-REEL PDF预览

AD630AR-REEL

更新时间： 2024-01-29 06:26:57
品牌 Logo 应用领域
亚德诺 - ADI 消费电路商用集成电路光电二极管
页数 文件大小 规格书
13页 494K
描述
Balanced Modulator/Demodulator

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AD630AR-REEL 技术参数

是否Rohs认证：不符合生命周期：Obsolete
零件包装代码：QLCC包装说明：CERAMIC, LCC-20
针数：20Reach Compliance Code：not_compliant
ECCN代码：5A991.AHTS代码：8542.39.00.01
风险等级：5.02Is Samacsys：N
商用集成电路类型：CONSUMER CIRCUITJESD-30 代码：S-CQCC-N20
JESD-609代码：e0长度：8.89 mm
端子数量：20最高工作温度：125 °C
最低工作温度：-55 °C封装主体材料：CERAMIC, METAL-SEALED COFIRED
封装代码：QCCN封装形状：SQUARE
封装形式：CHIP CARRIER峰值回流温度（摄氏度）：220
认证状态：Not Qualified座面最大高度：2.54 mm
最大压摆率：5 mA最大供电电压 (Vsup)：16.5 V
最小供电电压 (Vsup)：5 V表面贴装：YES
温度等级：MILITARY端子面层：Tin/Lead (Sn/Pb)
端子形式：NO LEAD端子节距：1.27 mm
端子位置：QUAD处于峰值回流温度下的最长时间：30
宽度：8.89 mmBase Number Matches：1

AD630AR-REEL 数据手册

 浏览型号AD630AR-REEL的Datasheet PDF文件第7页浏览型号AD630AR-REEL的Datasheet PDF文件第8页浏览型号AD630AR-REEL的Datasheet PDF文件第9页浏览型号AD630AR-REEL的Datasheet PDF文件第10页浏览型号AD630AR-REEL的Datasheet PDF文件第12页浏览型号AD630AR-REEL的Datasheet PDF文件第13页 
AD630  
[
T
]
5V  
5s  
5V  
500␮s/DIV  
B. 200mV/DIV  
100  
90  
MODULATED SIGNAL (A)  
(UNATTENUATED)  
ATTENUATED SIGNAL  
PLUS NOISE (B)  
T
3
10  
0%  
OUTPUT  
5mV  
C. 200mV/DIV  
A. 200mV/DIV  
Figure 15. Lock-In Amplifier Waveforms  
The test signal is produced by modulating a 400 Hz carrier with  
a 0.1 Hz sine wave. The signals produced, for example, by  
chopped radiation (i.e., IR, optical) detectors may have similar  
low frequency components. A sinusoidal modulation is used for  
clarity of illustration. This signal is produced by a circuit similar  
to Figure 9b and is shown in the upper trace of Figure 15. It is  
attenuated 100,000 times normalized to the output, B, of the  
summing amplifier. A noise signal that might represent, for  
example, background and detector noise in the chopped radia-  
tion case, is added to the modulated signal by the summing  
amplifier. This signal is simply band limited clipped white noise.  
Figure 15 shows the sum of attenuated signal plus noise in the  
center trace. This combined signal is demodulated synchro-  
nously using phase information derived from the modulator,  
and the result is low-pass filtered using a 2-pole simple filter  
which also provides a gain of 100 to the output. This recovered  
signal is the lower trace of Figure 15.  
Figure 13. AC Bridge Waveforms (1V Excitation)  
LOCK-IN AMPLIFIER APPLICATIONS  
Lock-in amplification is a technique used to separate a small,  
narrow-band signal from interfering noise. The lock-in amplifier  
acts as a detector and narrow-band filter combined. Very small  
signals can be detected in the presence of large amounts of  
uncorrelated noise when the frequency and phase of the desired  
signal are known.  
The lock-in amplifier is basically a synchronous demodulator  
followed by a low-pass filter. An important measure of performance  
in a lock-in amplifier is the dynamic range of its demodulator.  
The schematic diagram of a demonstration circuit which exhibits  
the dynamic range of an AD630 as it might be used in a lock-in  
amplifier is shown in Figure 14. Figure 15 is an oscilloscope  
photo demonstrating the large dynamic range of the AD630.  
The photo shows the recovery of a signal modulated at 400 Hz  
from a noise signal approximately 100,000 times larger.  
The combined modulated signal and interfering noise used for  
this illustration is similar to the signals often requiring a lock-in  
amplifier for detection. The precision input performance of the  
AD630 provides more than 100 dB of signal range and its  
dynamic response permits it to be used with carrier frequencies  
more than two orders of magnitude higher than in this example.  
A more sophisticated low-pass output filter will aid in rejecting  
wider bandwidth interference.  
CLIPPED  
C
BAND-LIMITED  
WHITE NOISE  
AD630  
B
5k⍀  
16  
1
100R  
15  
10k⍀  
AD542  
2.5k⍀  
AD542  
A
B
20  
19  
13  
R
2.5k⍀  
17  
100R  
C
100dB  
ATTENUATION  
14 10k⍀  
OUTPUT  
A
10  
9
LOW-PASS  
FILTER  
0.1Hz  
MODULATED  
400Hz  
CARRIER  
PHASE  
CARRIER  
REFERENCE  
Figure 14. Lock-In Amplifier  
–10–  
REV. E  
1...8910111213

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