전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

AD8004AR-14-REEL 데이터시트(PDF) 11 Page - Analog Devices

부품명 AD8004AR-14-REEL
상세설명  Quad 3000 V/mu s, 35 mW Current Feedback Amplifier
Download  17 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  AD [Analog Devices]
홈페이지  http://www.analog.com
Logo AD - Analog Devices

AD8004AR-14-REEL 데이터시트(HTML) 11 Page - Analog Devices

Back Button AD8004AR-14-REEL Datasheet HTML 7Page - Analog Devices AD8004AR-14-REEL Datasheet HTML 8Page - Analog Devices AD8004AR-14-REEL Datasheet HTML 9Page - Analog Devices AD8004AR-14-REEL Datasheet HTML 10Page - Analog Devices AD8004AR-14-REEL Datasheet HTML 11Page - Analog Devices AD8004AR-14-REEL Datasheet HTML 12Page - Analog Devices AD8004AR-14-REEL Datasheet HTML 13Page - Analog Devices AD8004AR-14-REEL Datasheet HTML 14Page - Analog Devices AD8004AR-14-REEL 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


유사한 부품 번호 - AD8004AR-14-REEL

제조업체부품명데이터시트상세설명
logo
Analog Devices
AD8004AR-14-REEL AD-AD8004AR-14-REEL Datasheet
271Kb / 16P
   Quad 3000 V/us, 35 mW Current Feedback Amplifier
REV. B
AD8004AR-14-REEL AD-AD8004AR-14-REEL Datasheet
501Kb / 16P
   Quad 3000 V/?? 35 mW Current Feedback Amplifier
REV. C
AD8004AR-14-REEL AD-AD8004AR-14-REEL Datasheet
715Kb / 17P
   Quad 3000 V/s, 35 mW Current Feedback Amplifier
REV. C
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
More results


Html Pages

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


데이터시트 다운로드

Go To PDF Page


링크 URL




개인정보취급방침
ALLDATASHEET.CO.KR
ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크교환   |   제조사별 검색
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