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5962-9063301MCA 参数 Datasheet PDF下载

5962-9063301MCA图片预览
型号: 5962-9063301MCA
PDF下载: 下载PDF文件 查看货源
内容描述: 四路精密,低成本,高速, BiFET运算放大器 [Quad Precision, Low Cost, High Speed, BiFET Op Amp]
分类和应用: 运算放大器放大器电路
文件页数/大小: 14 页 / 454 K
品牌: ADI [ ADI ]
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AD713  
A HIGH SPEED INSTRUMENTATION AMPLIFIER  
CIRCUIT  
A HIGH SPEED FOUR OP AMP CASCADED AMPLIFIER  
CIRCUIT  
The instrumentation amplifier circuit shown in Figure 5 can  
provide a range of gains from unity up to 1000 and higher using  
only a single AD713. The circuit bandwidth is 1.2 MHz at a  
gain of 1 and 250 kHz at a gain of 10; settling time for the entire  
circuit is less than 5 µs to within 0.01% for a 10 V step, (G = 10).  
Other uses for amplifier A4 include an active data guard and an  
active sense input.  
Figure 7 shows how the four amplifiers of the AD713 may be  
connected in cascade to form a high gain, high bandwidth am-  
plifier. This gain of 100 amplifier has a –3 dB bandwidth greater  
than 600 kHz.  
Figure 7. A High Speed Four Op Amp Cascaded  
Amplifier Circuit  
Figure 5. A High Speed Instrumentation Amplifier Circuit  
Table I provides a performance summary for this circuit. The  
photo of Figure 6 shows the pulse response of this circuit for a  
gain of 10.  
Table I. Performance Summary for the High Speed  
Instrumentation Amplifier Circuit  
Gain  
RG  
Bandwidth  
T Settle (0.01%)  
1
2
10  
NC  
20 kΩ  
4.04 kΩ  
1.2 MHz  
1.0 MHz  
0.25 MHz  
2 µs  
2 µs  
5 µs  
Figure 8. THD Test Circuit  
HIGH SPEED OP AMP APPLICATIONS AND  
TECHNIQUES  
DAC Buffers (I-to-V Converters)  
The wide input dynamic range of JFET amplifiers makes them  
ideal for use in both waveform reconstruction and digital-audio  
DAC applications. The AD713, in conjunction with the AD1860  
DAC, can achieve 0.0016% THD (here at a 4fs or a 176.4 kHz  
update rate) without requiring the use of a deglitcher. Just such  
a circuit is shown in Figure 9. The 470 pF feedback capacitor  
used with IC2a, along with op amp IC2b and its associated  
components, together form a 3-pole low-pass filter. Each or all  
of these poles can be tailored for the desired attenuation and  
phase characteristics required for a particular application. In this  
application, one half of an AD713 serves each channel in a two-  
channel stereo system.  
Figure 6. The Pulse Response of the High Speed  
Instrumentation Amplifier. Gain = 10  
–8–  
REV. C