数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

AD8005AR 数据表(PDF) 9 Page - Analog Devices

部件名 AD8005AR
功能描述  270 MHz, 400 uA Current Feedback Amplifier
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD8005AR 数据表(HTML) 9 Page - Analog Devices

Back Button AD8005AR Datasheet HTML 4Page - Analog Devices AD8005AR Datasheet HTML 5Page - Analog Devices AD8005AR Datasheet HTML 6Page - Analog Devices AD8005AR Datasheet HTML 7Page - Analog Devices AD8005AR Datasheet HTML 8Page - Analog Devices AD8005AR Datasheet HTML 9Page - Analog Devices AD8005AR Datasheet HTML 10Page - Analog Devices AD8005AR Datasheet HTML 11Page - Analog Devices AD8005AR Datasheet HTML 12Page - Analog Devices  
Zoom Inzoom in Zoom Outzoom out
 9 / 12 page
background image
AD8005
–9–
REV. A
APPLICATIONS
Driving Capacitive Loads
Capacitive loads interact with an op amp’s output impedance
to create an extra delay in the feedback path. This reduces
circuit stability, and can cause unwanted ringing and oscilla-
tion. A given value of capacitance causes much less ringing
when the amplifier is used with a higher noise gain.
The capacitive load drive of the AD8005 can be increased by
adding a low valued resistor in series with the capacitive load.
Introducing a series resistor tends to isolate the capacitive load
from the feedback loop thereby diminishing its influence. Fig-
ure 29 shows the effects of a series resistor on capacitive drive
for varying voltage gains. As the closed-loop gain is increased,
the larger phase margin allows for larger capacitive loads with
less overshoot. Adding a series resistor at lower closed-loop
gains accomplishes the same effect. For large capacitive loads,
the frequency response of the amplifier will be dominated by
the roll-off of the series resistor and capacitive load.
AD8005
RG
RF
RS
RL
1k
CL
Figure 28. Driving Capacitive Loads
80
70
60
1
345
CLOSED-LOOP GAIN – V/V
50
2
40
30
20
10
0
VS = 5V
RS = 10
RS = 5
RS = 0
2V OUTPUT STEP
WITH 30% OVERSHOOT
Figure 29. Capacitive Load Drive vs. Closed-Loop Gain
Single-Supply Level Shifter
In addition to providing buffering, many systems require that an
op amp provide level shifting. A common example is the level
shifting that is required to move a bipolar signal into the unipo-
lar range of many modern analog-to-digital converters (ADCs). In
general, single supply ADCs have input ranges that are refer-
enced neither to ground nor supply. Instead the reference level
is some point in between, usually halfway between ground and
supply (+2.5 V for a single supply 5 V ADC). Because high-
speed ADCs typically have input voltage ranges of 1 V to 2 V,
the op amp driving it must be single supply but not necessarily
rail-to-rail.
VREF
+5V
R2
1.5k
VOUT
0.01 F
10 F
+5V
R1
1.5k
VIN
0.1 F
R4
10k
R3
30.1k
AD8005
Figure 30. Bipolar to Unipolar Level Shifter
Figure 30 shows a level shifter circuit that can move a bipolar
signal into a unipolar range. A positive reference voltage, derived
from the +5 V supply, sets a bias level of +1.25 V at the nonin-
verting terminal of the op amp. In ac applications, the accuracy of
this voltage level is not important. Noise is however a serious
consideration. A 0.1
µF capacitor provides useful decoupling of
this noise.
The bias level on the noninverting terminal sets the input common-
mode voltage to +1.25 V. Because the output will always be
positive, the op amp may therefore be powered with a single
+5 V power supply.
The overall gain function is given by the equation:
VOUT = –
R2
R1


V IN +
R4
R3
+ R4


1
+
R2
R1


V REF
In the above example, the equation simplifies to
VOUT = –V IN + 2.5V


类似零件编号 - AD8005AR

制造商部件名数据表功能描述
logo
Analog Devices
AD8005AR AD-AD8005AR Datasheet
171Kb / 12P
   270 MHz, 400 mA Current Feedback Amplifier
REV. A
AD8005AR-REEL AD-AD8005AR-REEL Datasheet
171Kb / 12P
   270 MHz, 400 mA Current Feedback Amplifier
REV. A
AD8005AR-REEL7 AD-AD8005AR-REEL7 Datasheet
171Kb / 12P
   270 MHz, 400 mA Current Feedback Amplifier
REV. A
AD8005ART-REEL AD-AD8005ART-REEL Datasheet
171Kb / 12P
   270 MHz, 400 mA Current Feedback Amplifier
REV. A
AD8005ART-REEL7 AD-AD8005ART-REEL7 Datasheet
171Kb / 12P
   270 MHz, 400 mA Current Feedback Amplifier
REV. A
More results

类似说明 - AD8005AR

制造商部件名数据表功能描述
logo
Analog Devices
AD8005ARTZ-REEL7 AD-AD8005ARTZ-REEL7 Datasheet
171Kb / 12P
   270 MHz, 400 mA Current Feedback Amplifier
REV. A
AD8005ARZ AD-AD8005ARZ Datasheet
187Kb / 12P
   270 MHz, 400 關A Current Feedback Amplifier
REV. A
AD8005 AD-AD8005_15 Datasheet
376Kb / 16P
   270 MHz, 400A Current Feedback Amplifier
REV. B
AD8011ARZ-REEL AD-AD8011ARZ-REEL Datasheet
206Kb / 16P
   300 MHz Current Feedback Amplifier
REV. C
AD8011ANZ AD-AD8011ANZ Datasheet
206Kb / 16P
   300 MHz Current Feedback Amplifier
REV. C
logo
Elantec Semiconductor
EL2030 ELANTEC-EL2030 Datasheet
408Kb / 16P
   120 MHz Current Feedback Amplifier
EL2020D ELANTEC-EL2020D Datasheet
422Kb / 2P
   50 MHz Current Feedback Amplifier
EL2020C ELANTEC-EL2020C Datasheet
409Kb / 20P
   50 MHz Current Feedback Amplifier
EL2130C ELANTEC-EL2130C Datasheet
230Kb / 8P
   85 MHz Current Feedback Amplifier
logo
Analog Devices
AD8011 AD-AD8011_03 Datasheet
267Kb / 16P
   300 MHz Current Feedback Amplifier
REV. C
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com