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AD743

更新时间： 2024-11-19 22:49:59
品牌 Logo 应用领域
亚德诺 - ADI 运算放大器
页数 文件大小 规格书
12页 309K
描述
Ultralow Noise BiFET Op Amp

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中文翻译

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AD743 数据手册

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Ultralow Noise  
BiFET Op Amp  
a
AD743  
CO NNECTIO N D IAGRAMS  
8-P in P lastic Mini-D IP (N)  
FEATURES  
ULTRALOW NOISE PERFORMANCE  
2.9 nV/ √Hz at 10 kHz  
0.38 ␮V p-p, 0.1 Hz to 10 Hz  
6.9 fA/ √Hz Current Noise at 1 kHz  
and  
16-P in SO IC (R) P ackage  
8-P in Cer dip (Q ) P ackages  
1
2
3
4
5
6
NC  
1
2
3
4
8
16 NC  
NULL  
–IN  
NC  
+V  
AD743  
EXCELLENT DC PERFORMANCE  
0.5 m V m ax Offset Voltage  
250 pA m ax Input Bias Current  
1000 V/ m V m in Open-Loop Gain  
OFFSET  
NULL  
15  
NC  
7
6
5
S
AD743  
–IN  
NC  
+IN  
NC  
+V  
14  
13  
+IN  
OUT  
–V  
S
NULL  
S
TOP VIEW  
AC PERFORMANCE  
2.8 V/ ␮s Slew Rate  
4.5 MHz Unity-Gain Bandw idth  
THD = 0.0003% @ 1 kHz  
Available in Tape and Reel in Accordance w ith  
EIA-481A Standard  
12 OUTPUT  
NC = NO CONNECT  
OFFSET  
11  
–V  
S
NULL  
NC  
NC  
7
8
10  
9
NC  
NC  
NC = NO CONNECT  
APPLICATIONS  
P RO D UCT H IGH LIGH TS  
Sonar Pream plifiers  
1. T he low offset voltage and low input offset voltage drift of  
the AD743 coupled with its ultralow noise performance  
mean that the AD743 can be used for upgrading many  
applications now using bipolar amplifiers.  
High Dynam ic Range Filters (>140 dB)  
Photodiode and IR Detector Am plifiers  
Accelerom eters  
2. T he combination of low voltage and low current noise make  
the AD743 ideal for charge sensitive applications such as  
accelerometers and hydrophones.  
P RO D UCT D ESCRIP TIO N  
T he AD743 is an ultralow noise precision, FET input,  
monolithic operational amplifier. It offers a combination of the  
ultralow voltage noise generally associated with bipolar input op  
amps and the very low input current of a FET -input device.  
Furthermore, the AD743 does not exhibit an output phase  
reversal when the negative common-mode voltage limit is  
exceeded.  
3. T he low input offset voltage and low noise level of the  
AD743 provide >140 dB dynamic range.  
4. T he typical 10 kHz noise level of 2.9 nV/√Hz permits a three  
op amp instrumentation amplifier, using three AD743s, to be  
built which exhibits less than 4.2 nV/√Hz noise at 10 kHz  
and which has low input bias currents.  
T he AD743’s guaranteed, maximum input voltage noise of  
4.0 nV/√Hz at 10 kHz is unsurpassed for a FET -input  
monolithic op amp, as is the maximum 1.0 µV p-p, 0.1 Hz to  
10 Hz noise. T he AD743 also has excellent dc performance with  
250 pA maximum input bias current and 0.5 mV maximum  
offset voltage.  
1000  
OP27 &  
RESISTOR  
R
SOURCE  
( — )  
E
O
R
100  
SOURCE  
T he AD743 is specifically designed for use as a preamp in  
capacitive sensors, such as ceramic hydrophones. It is available  
in five performance grades. T he AD743J and AD743K are rated  
over the commercial temperature range of 0°C to +70°C. T he  
AD743A and AD743B are rated over the industrial temperature  
range of –40°C to +85°C. T he AD743S is rated over the  
military temperature range of –55°C to +125°C and is available  
processed to MIL-ST D-883B, Rev. C.  
AD743 + RESISTOR  
AD743 & RESISTOR  
OR  
OP27 & RESISTOR  
)
(
10  
RESISTOR NOISE ONLY  
(– – –)  
T he AD743 is available in 8-pin plastic mini-DIP, 8-pin cerdip,  
16-pin SOIC, or in chip form.  
1
100  
10M  
1M  
10k  
100k  
1k  
SOURCE RESISTANCE – Ω  
Input Noise Voltage vs. Source Resistance  
REV. C  
Inform ation furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assum ed by Analog Devices for its  
use, nor for any infringem ents of patents or other rights of third parties  
which m ay result from its use. No license is granted by im plication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.  
Tel: 617/ 329-4700  
Fax: 617/ 326-8703  
1234567...12

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