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AD8608ARZ-REEL 参数 Datasheet PDF下载

AD8608ARZ-REEL图片预览
型号: AD8608ARZ-REEL
PDF下载: 下载PDF文件 查看货源
内容描述: 精密,低噪声, CMOS ,轨到轨输入/输出运算放大器 [Precision, Low Noise, CMOS, Rail-to-Rail, Input/Output Operational Amplifiers]
分类和应用: 运算放大器
文件页数/大小: 24 页 / 733 K
品牌: ADI [ ADI ]
 浏览型号AD8608ARZ-REEL的Datasheet PDF文件第11页浏览型号AD8608ARZ-REEL的Datasheet PDF文件第12页浏览型号AD8608ARZ-REEL的Datasheet PDF文件第13页浏览型号AD8608ARZ-REEL的Datasheet PDF文件第14页浏览型号AD8608ARZ-REEL的Datasheet PDF文件第16页浏览型号AD8608ARZ-REEL的Datasheet PDF文件第17页浏览型号AD8608ARZ-REEL的Datasheet PDF文件第18页浏览型号AD8608ARZ-REEL的Datasheet PDF文件第19页  
AD8605/AD8606/AD8608  
APPLICATIONS INFORMATION  
OUTPUT PHASE REVERSAL  
V
V
A
R
= ±2.5V  
= 6V p-p  
= 1  
S
IN  
V
OUT  
Phase reversal is defined as a change in polarity at the output of  
the amplifier when a voltage that exceeds the maximum input  
common-mode voltage drives the input.  
V
L
= 10kΩ  
V
Phase reversal can cause permanent damage to the amplifier; it  
can also cause system lockups in feedback loops. The AD8605  
does not exhibit phase reversal even for inputs exceeding the  
supply voltage by more than 2 V.  
IN  
MAXIMUM POWER DISSIPATION  
Power dissipated in an IC causes the die temperature to  
increase, which can affect the behavior of the IC and the  
application circuit performance.  
TIME (4µs/DIV)  
Figure 43. No Phase Reversal  
The absolute maximum junction temperature of the AD8605/  
AD8606/AD8608 is 150°C. Exceeding this temperature could  
damage or destroy the device.  
1.8  
1.7  
1.6  
1.5  
1.4  
1.3  
1.2  
1.1  
1.0  
0.9  
0.8  
0.7  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
0
SOIC-14  
The maximum power dissipation of the amplifier is calculated  
according to  
TSSOP-14  
TJ TA  
SOIC-8  
PDISS  
=
θJA  
MSOP-8  
where:  
WLCSP-5  
TJ is the junction temperature.  
TA is the ambient temperature.  
5-LEAD SOT-23  
θJA is the junction-to-ambient thermal resistance.  
–45  
–20  
5
30  
55  
80  
105  
130  
Figure 44 compares the maximum power dissipation with  
temperature for the various AD860x family packages.  
AMBIENT TEMPERATURE (°C)  
Figure 44. Maximum Power Dissipation vs. Ambient Temperature  
INPUT OVERVOLTAGE PROTECTION  
0.1  
V
A
B
= ±2.5V  
= 1  
= 80kHz  
SY  
The AD8605 has internal protective circuitry. However, if the  
voltage applied at either input exceeds the supplies by more  
than 2.5 V, external resistors should be placed in series with  
the inputs. The resistor values can be determined by  
V
W
0.01  
0.001  
VIN VS  
5mA  
RS +200Ω  
The remarkable low input offset current of the AD8605 (<1 pA)  
allows the use of larger value resistors. With a 10 kꢀ resistor at  
the input, the output voltage has less than 10 nV of error voltage.  
A 10 kꢀ resistor has less than 13 nV/√Hz of thermal noise at  
room temperature.  
0.0001  
20  
100  
1k  
10k 20k  
FREQUENCY (Hz)  
THD + NOISE  
Figure 45. THD + Noise vs. Frequency  
Total harmonic distortion is the ratio of the input signal in V rms  
to the total harmonics in V rms throughout the spectrum.  
Harmonic distortion adds errors to precision measurements  
and adds unpleasant sonic artifacts to audio systems.  
The AD8605 has a low total harmonic distortion. Figure 45 shows  
that the AD8605 has less than 0.005% or −86 dB of THD + N  
over the entire audio frequency range. The AD8605 is configured  
in positive unity gain, which is the worst case, and with a load  
of 10 kꢀ.  
Rev. H | Page 15 of 24