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

X  

预览 PDF HTML

ADS5271 数据表(PDF) 32 Page - Texas Instruments

部件名 ADS5271
功能描述  10-Bit, Octal-Channel ADC Up to 65MSPS
PDF  42 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  TI2 [Texas Instruments]
网页  https://www.ti.com
标志 TI2 - Texas Instruments

ADS5271 数据表(HTML) 32 Page - Texas Instruments

Back Button ADS5271 Datasheet HTML 28Page - Texas Instruments ADS5271 Datasheet HTML 29Page - Texas Instruments ADS5271 Datasheet HTML 30Page - Texas Instruments ADS5271 Datasheet HTML 31Page - Texas Instruments ADS5271 Datasheet HTML 32Page - Texas Instruments ADS5271 Datasheet HTML 33Page - Texas Instruments ADS5271 Datasheet HTML 34Page - Texas Instruments ADS5271 Datasheet HTML 35Page - Texas Instruments ADS5271 Datasheet HTML 36Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 32 / 42 page
background image
CMBuffer
Internal
Voltage
Reference
Input
Circuitry
IN
P
IN
N
V
CM
1.2kW
1.2kW
ADS5287
(2mA)
f
´ S
50MSPS
5nHto9nH(TQFP-80)
2nHto3nH(QFN-64)
1.5pF
to2.4pF
IN
OUT
IN
P
1.5pFto
2.5pF
1W
1000W
to1440W
5W
to10W
1000W
to1440W
5nHto9nH(TQFP-80)
2nHto3nH(QFN-64)
IN
N
1.5pFto
2.5pF
1W
15W
to25W
15W
to30W
0.2pF
to0.3pF
IN
OUT
1.5pF
to2.4pF
IN
OUT
5W
to10W
15W
to25W
15W
to30W
IN
OUT
IN
OUT
16
to32
W
W
IN
OUT
IN
OUT
OUT
P
OUT
N
SwitchesthatareON
inSAMPLEphase.
SwitchesthatareON
inHOLDphase.
ADS5287
SBAS428D – JANUARY 2008 – REVISED JUNE 2012
www.ti.com
Figure 31. Analog Input Circuit Model
during ac-coupling by increasing VCM by roughly
Input Common-Mode Current
75mV.
When
operating
above
50MSPS,
it
is
recommended that additional parallel resistors be
The input stage of all eight ADCs together sinks a
added externally to restore the input common-mode
common-mode current on the order of 2mA at
to at least 1.4V, if the inputs are to be ac-coupled.
50MSPS. Equation 3 describes the dependency of
the
common-mode
current
and
the
sampling
frequency.
(3)
If the driving stage is dc-coupled to the inputs, then
Equation 3 can be used to determine its common-
mode drive capability and impedance. The inputs can
also be ac-coupled to the INN and INP pins. In that
case, the input common-mode is set by two internal
1.2k
Ω resistors connecting the input pins to VCM. This
architecture is shown in Figure 32.
When the inputs are ac-coupled, there is a drop in
the voltages at INP and INN relative to VCM. This can
Dashed area denotes one of eight channels.
be computed from Equation 3. At 50MSPS, for
Figure 32. Common-Mode Biasing of Input Pins
example, the drop at each of the 16 input pins is
150mV, which is not optimal for ADC operation.
Initialization Registers 1 and 5, described in the
Initialization Register table, can be used to partially
reduce the effect of this input common-mode drop
32
Copyright © 2008–2012, Texas Instruments Incorporated



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42


数据表 下载

Go To PDF Page


链接网址



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   |   数据表链接    |   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