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AD817AREEL 参数 Datasheet PDF下载

AD817AREEL图片预览
型号: AD817AREEL
PDF下载: 下载PDF文件 查看货源
内容描述: [IC OP-AMP, 4000 uV OFFSET-MAX, 50 MHz BAND WIDTH, PDSO8, PLASTIC, SOIC-8, Operational Amplifier]
分类和应用: 放大器光电二极管
文件页数/大小: 12 页 / 212 K
品牌: ADI [ ADI ]
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AD817  
O FFSET NULLING  
Measuring the rapid settling time of AD817 (45 ns to 0.1% and  
70 ns to 0.01%–10 V step) requires applying an input pulse with  
a very fast edge and an extremely flat top. With the AD817 con-  
figured in a gain of –1, a clamped false summing junction re-  
sponds when the output error is within the sum of two diode  
voltages (ª1 volt). T he signal is then amplified 20 times by a  
clamped amplifier whose output is connected directly to a sam-  
pling oscilloscope. Figures 33 and 34 show the settling time of  
the AD817, with a 10 volt step applied.  
T he input offset voltage of the AD817 is inherently very low.  
However, if additional nulling is required, the circuit shown in  
Figure 32 can be used. T he null range of the AD817 in this con-  
figuration is ±15 mV.  
AD 817 SETTLING TIME  
Settling time is comprised primarily of two regions. T he first is  
the slew time in which the amplifier is overdriven, where the  
output voltage rate of change is at its maximum. T he second is  
the linear time period required for the amplifier to settle to  
within a specified percent of the final value.  
0
–2  
–4  
–6  
–8  
–10  
10  
8
6
4
0.20  
0.15  
0.10  
0.05  
0
2
0
0.05  
0
0.05  
0.05  
0.10  
0.15  
0.20  
0
50  
100 150 200 250 300 350 400  
Figure 34. Settling Tim e in ns 0 V to –10 V  
0
50  
100 150 200 250 300 350 400  
Figure 33. Settling Tim e in ns 0 V to +10 V  
2×  
HP2835  
15pF  
1MΩ  
ERROR AMPLIFIER  
V
OUTPUT × 10  
ERROR  
5
3
2
100Ω  
2×  
HP2835  
SETTLING  
OUTPUT  
AD829  
6
0.47µF  
4
SHORT, DIRECT  
7
CONNECTION TO  
0.01µF  
0.47µF  
TEKTRONIX TYPE 11402  
OSCILLOSCOPE PREAMP  
INPUT SECTION  
0.01µF  
ERROR  
SIGNAL  
OUTPUT  
+V  
–V  
S
S
100Ω  
1.9kΩ  
0 TO ±10V  
POWER  
SUPPLY  
NOTE:  
USE CIRCUIT BOARD  
WITH GROUND PLANE  
EI&S  
DL1A05GM  
MERCURY RELAY  
FALSE  
SUMMING  
NODE  
NULL  
ADJUST  
7, 8  
1kΩ  
100Ω  
1kΩ  
500Ω  
2
50Ω  
COAX  
CABLE  
DEVICE  
UNDER  
TEST  
13  
TTL LEVEL  
5–18pF  
SIGNAL  
GENERATOR  
50Hz  
TEKTRONIX P6201  
FET PROBE TO  
TEKTRONIX TYPE  
11402  
1, 14  
500Ω  
2
3
OUTPUT  
6
AD817  
50Ω  
OSCILLOSCOPE  
PREAMP INPUT  
SECTION  
10pF  
SCOPE PROBE  
CAPACITANCE  
7
4
0.01µF  
2.2µF  
DIGITAL  
GROUND  
0.01µF  
2.2µF  
+V  
S
ANALOG  
GROUND  
–V  
S
Figure 35. Settling Tim e Test Circuit  
–10–  
REV. B  
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