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

X  

AD8004AR-14-REEL7 数据表(PDF) 11 Page - Analog Devices

部件名 AD8004AR-14-REEL7
功能描述  Quad 3000 V/mu s, 35 mW Current Feedback Amplifier
Download  17 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

AD8004AR-14-REEL7 数据表(HTML) 11 Page - Analog Devices

Back Button AD8004AR-14-REEL7 Datasheet HTML 7Page - Analog Devices AD8004AR-14-REEL7 Datasheet HTML 8Page - Analog Devices AD8004AR-14-REEL7 Datasheet HTML 9Page - Analog Devices AD8004AR-14-REEL7 Datasheet HTML 10Page - Analog Devices AD8004AR-14-REEL7 Datasheet HTML 11Page - Analog Devices AD8004AR-14-REEL7 Datasheet HTML 12Page - Analog Devices AD8004AR-14-REEL7 Datasheet HTML 13Page - Analog Devices AD8004AR-14-REEL7 Datasheet HTML 14Page - Analog Devices AD8004AR-14-REEL7 Datasheet HTML 15Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 17 page
background image
REV. C
AD8004
–10–
DRIVING CAPACITIVE LOADS
The AD8004 was designed primarily to drive nonreactive loads.
If driving loads with a capacitive component is desired, best
settling response is obtained by the addition of a small series
resistance as shown in Figure 6. The accompanying graph shows
the optimum value for RSERIES vs. capacitive load. It is worth
noting that the frequency response of the circuit when driving
large capacitive loads will be dominated by the passive roll-off of
RSERIES and CL.
1k
RL
1k
CL
AD8004
RSERIES
1k
Figure 6. Driving Capacitive Load
40
30
20
010
15
20
25
CL – pF
10
5
Figure 7. Recommended RSERIES vs. Capacitive Load for
£ 30 ns Settling to 0.1%
OPTIMIZING FLATNESS
The fine scale gain flatness and –3 dB bandwidth is affected by
RFEEDBACK selection as is normal of current feedback amplifiers.
With the exception of gain = +1, the AD8004 can be adjusted
for either maximal flatness with modest closed-loop bandwidth
or for mildly peaked-up frequency response with much more
bandwidth. Figure 8 shows the effect of three evenly spaced RF
changes upon gain = +1 and gain = +2. Table I shows the
recommended component values for achieving maximally flat
frequency response as well as a faster slightly peaked-up fre-
quency response.
Printed circuit board parasitics and device lead frame parasitics
also control fine scale gain flatness. The AD8004R package,
because of its small lead frame, offers superior parasitics relative
to the N package. In the printed circuit board environment,
parasitics such as extra capacitance caused by two parallel and
vertical flat conductors on opposite PC board sides in the
region of the summing junction will cause some bandwidth
extension and/or increased peaking. In noninverting gains, the
effect of extra capacitance on summing junctions is far more
pronounced than with inverting gains. Figure 9 shows an example
of this. Note that only 1 pF of added junction capacitance causes
about a 70% bandwidth extension and additional peaking on a
gain = +2. For an inverting gain = –2, 5 pF of additional summing
junction capacitance caused a small 10% bandwidth extension.
Extra output capacitive loading also causes bandwidth exten-
sions and peaking. The effect is more pronounced with less
resistive loading from the next stage. Figure 10 shows the effect
of direct output capacitive loads for gains of +2 and –2. For both
gains CLOAD was set to 10 pF or 0 pF (no extra capacitive loading).
For each of the four traces in Figure 10 the resistive loads were
100
. Figure 11 also shows capacitive loading effects with a
lighter output resistive load. Note that even though bandwidth
is extended 2
¥, the flatness dramatically suffers.
FREQUENCY – MHz
–2
1
500
10
40
100
1
0
–1
VIN = 50mV rms
VS = 5V
RL = 100
R PACKAGE
–3
–4
–5
2
–3
0
1
–1
–2
–4
–5
–6
RF = 1.10k
RF = 604
G = +1
G = +2
–7
–8
RF = 845
RF = 909
RF = 1.1k
RF = 698
Figure 8. RFEEDBACK vs. Frequency Response, G = +1/+2
FREQUENCY – MHz
2
–8
1
500
10
40
100
–2
0
–4
–6
VIN = 50mV rms
RL = 100
5VS
–10
–12
–14
2
–8
–2
0
–4
–6
–10
–12
–14
CJ = 1pF
CJ = 0
CJ = 5.1pF
CJ = 0
G = +2
G = –2
Figure 9. Frequency Response vs. Added Summing
Junction Capacitance


类似零件编号 - AD8004AR-14-REEL7

制造商部件名数据表功能描述
logo
Analog Devices
AD8004AR-14-REEL7 AD-AD8004AR-14-REEL7 Datasheet
271Kb / 16P
   Quad 3000 V/us, 35 mW Current Feedback Amplifier
REV. B
AD8004AR-14-REEL7 AD-AD8004AR-14-REEL7 Datasheet
501Kb / 16P
   Quad 3000 V/?? 35 mW Current Feedback Amplifier
REV. C
AD8004AR-14-REEL7 AD-AD8004AR-14-REEL7 Datasheet
715Kb / 17P
   Quad 3000 V/s, 35 mW Current Feedback Amplifier
REV. C
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17


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