參數(shù)資料
型號(hào): AD8541ART-REEL
廠商: ANALOG DEVICES INC
元件分類: 運(yùn)動(dòng)控制電子
英文描述: General-Purpose CMOS Rail-to-Rail Amplifiers
中文描述: OP-AMP, 7000 uV OFFSET-MAX, 0.98 MHz BAND WIDTH, PDSO5
封裝: MO-178AA, SOT-23, 5 PIN
文件頁數(shù): 14/20頁
文件大小: 305K
代理商: AD8541ART-REEL
AD8541/AD8542/AD8544
PHOTODIODE APPLICATION
The AD854x family has very high impedance with an input bias
current typically around 4 pA. This characteristic allows the
AD854x op amps to be used in photodiode applications and
other applications that require high input impedance. Note that
the AD854x has significant voltage offset that can be removed
by capacitive coupling or software calibration.
Figure 39 illustrates a photodiode or current measurement
application. The feedback resistor is limited to 10 MΩ to avoid
excessive output offset. Also, note that a resistor is not needed
on the noninverting input to cancel bias current offset because
the bias current-related output offset is not significant when
compared to the voltage offset contribution. For best
performance, follow the standard high impedance layout
techniques, which include:
Shielding the circuit.
Cleaning the circuit board.
Putting a trace connected to the noninverting input around
the inverting input.
Using separate analog and digital power supplies.
Rev. E | Page 14 of 20
AD8541
4
6
7
3
2
D
OR
V+
2.5V
REF
C
100pF
R
10M
2.5V
REF
V
OUT
0
Figure 39. High Input Impedance Application—Photodiode Amplifier
相關(guān)PDF資料
PDF描述
AD8541ARTZ-R2 General-Purpose CMOS Rail-to-Rail Amplifiers
AD8541ARTZ-REEL General-Purpose CMOS Rail-to-Rail Amplifiers
AD8541ARTZ-REEL7 General-Purpose CMOS Rail-to-Rail Amplifiers
AD8541ARZ1 General-Purpose CMOS Rail-to-Rail Amplifiers
AD8541ARZ-REEL General-Purpose CMOS Rail-to-Rail Amplifiers
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