Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

AD9203ARU Arkusz danych(PDF) 11 Page - Analog Devices

Numer części AD9203ARU
Szczegółowy opis  10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter
Download  19 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

AD9203ARU Arkusz danych(HTML) 11 Page - Analog Devices

Back Button AD9203ARU Datasheet HTML 7Page - Analog Devices AD9203ARU Datasheet HTML 8Page - Analog Devices AD9203ARU Datasheet HTML 9Page - Analog Devices AD9203ARU Datasheet HTML 10Page - Analog Devices AD9203ARU Datasheet HTML 11Page - Analog Devices AD9203ARU Datasheet HTML 12Page - Analog Devices AD9203ARU Datasheet HTML 13Page - Analog Devices AD9203ARU Datasheet HTML 14Page - Analog Devices AD9203ARU Datasheet HTML 15Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 19 page
background image
REV. 0
AD9203
REV. 0
–11–
Figure 19 shows the reference programmed by external resistors
for 0.75 V. This will set the ADC to receive a 1.5 V span cen-
tered about 0.75 V. The reference is programmed according to
the algorithm
VREF = 0.5 V
× [1 + (RA/RB)]
ADC
CORE
+
LOGIC
0.1 F
10 F
AINP
AINN
VREF
0.5V
REFTF
REFBF
REFSENSE
1.5V
0V
RA
RB
0.1 F
1.875V
1.125V
0.1 F
0.1 F
10 F
AD9203
Figure 19. Programmable Reference Configuration
EXTERNAL REFERENCE OPERATION
Figure 20 illustrates the use of an external reference. An exter-
nal reference may be necessary for several reasons. Tighter
reference tolerance will enhance the accuracy of the ADC and
will allow lower temperature drift performance. When several
ADC’s track one another, a single reference (internal or exter-
nal) will be necessary. The AD9203 will draw less power when
an external reference is used.
When the REFSENSE pin is tied to AVDD, the internal refer-
ence will be disabled, allowing the use of an external reference.
The AD9203 contains an internal reference buffer. It will load
the external reference with an equivalent 10 k
Ω load. The inter-
nal buffer will generate positive and negative full-scale references
for the ADC core.
In Figure 20, an external reference is used to set the midscale
set point for single-ended use. At the same time, it sets the input
voltage span through a resistor divider. If the ADC is being
driven differentially through a transformer, the external refer-
ence can set the center tap (common-mode voltage).
1.0V
2.0V
0.1 F
10 F
VREF
AD9203
+5V
0.1 F
1.5k
0.1 F
3.0V
REFSENSE
A3
AVDD
AINP
AINN
EXTERNAL
REF (2V)
1V
1.5k
Figure 20. External Reference Configuration
CLAMP OPERATION
The AD9203 contains an internal clamp. It may be used when
operating the input in a single-ended mode. The AD9203’s
clamp is very useful for clamping NTSC and PAL video signals
to ground. The clamp cannot be used in the differential input
mode.
1V p-p
0Vdc
ADC
CORE
REFSENSE
VREF
AINN
CIN
CLAMP
IN
CLAMP
AD9203
AINP
SW1
50
TYP
Figure 21. Clamp Configuration (VREF = 0.5 V)
Figure 21 shows the internal clamp circuitry and the external
control signals needed for clamp operation. To enable the clamp,
apply a logic high “1” to the CLAMP pin. This will close the
internal switch SW1. SW1 is opened by asserting the CLAMP
pin low “0.” The capacitor holds the voltage across CIN con-
stant until the next interval. The charge on the capacitor will
leak off as a function of input bias current (see Figure 22).
INPUT VOLTAGE – Volts
250
200
03
0.5
150
100
50
0
–50
1
1.5
2
2.5
Figure 22. Input Bias Current vs. Input Voltage
(FS = 40 MSPS)


Podobny numer części - AD9203ARU

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Analog Devices
AD9203ARU AD-AD9203ARU Datasheet
1Mb / 28P
   10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter
REV. B
AD9203ARU AD-AD9203ARU Datasheet
1Mb / 28P
   10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter
REV. B
AD9203ARU AD-AD9203ARU Datasheet
1Mb / 29P
   A/D Converter
AD9203ARURL7 AD-AD9203ARURL7 Datasheet
1Mb / 28P
   10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter
REV. B
AD9203ARURL7 AD-AD9203ARURL7 Datasheet
1Mb / 28P
   10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter
REV. B
More results

Podobny opis - AD9203ARU

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Analog Devices
AD9203 AD-AD9203_15 Datasheet
1Mb / 28P
   10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter
REV. B
AD9203ARUZ AD-AD9203ARUZ Datasheet
1Mb / 28P
   10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter
REV. B
AD9203ARUZRL7 AD-AD9203ARUZRL7 Datasheet
1Mb / 28P
   10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter
REV. B
AD9203ARUZRL7 AD-AD9203ARUZRL7 Datasheet
1Mb / 28P
   10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter
REV. B
AD9203W AD-AD9203W Datasheet
134Kb / 8P
   10-Bit, 40 MSPS, 3 V, 74 mW Analog-to-Digital Converter
REV. 0
logo
Fairchild Semiconductor
SPT7861 FAIRCHILD-SPT7861 Datasheet
87Kb / 11P
   10-BIT, 40 MSPS, 160 mW A/D CONVERTER
logo
Cadeka Microcircuits LL...
SPT7863 CADEKA-SPT7863 Datasheet
183Kb / 11P
   10-BIT, 40 MSPS, 160 mW A/D CONVERTER
SPT7860 CADEKA-SPT7860 Datasheet
193Kb / 12P
   10-BIT, 40 MSPS, 175 mW A/D CONVERTER
SPT7861 CADEKA-SPT7861 Datasheet
180Kb / 11P
   10-BIT, 40 MSPS, 160 mW A/D CONVERTER
logo
Fairchild Semiconductor
SPT7860 FAIRCHILD-SPT7860 Datasheet
99Kb / 12P
   10-BIT, 40 MSPS, 175 mW A/D CONVERTER
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
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