 |
データシートサーチシステム |
|
|
データシートサーチシステム |
|
AD9280ARSZ データシート(PDF) 8 Page - Analog Devices |
|
||||||||||||||||||||||||||||||
AD9280ARSZ データシート(HTML) 8 Page - Analog Devices |
|
|
8 / 24 page  AD9280 –8– Table I. Mode Selection Input Input MODE REFSENSE Modes Connect Span Pin Pin REF REFTS REFBS Figure TOP/BOTTOM AIN 1 V AVDD Short REFSENSE, REFTS and VREF Together AGND 18 AIN 2 V AVDD AGND Short REFTS and VREF Together AGND 19 CENTER SPAN AIN 1 V AVDD/2 Short VREF and REFSENSE Together AVDD/2 AVDD/2 20 AIN 2 V AVDD/2 AGND No Connect AVDD/2 AVDD/2 Differential AIN Is Input 1 1 V AVDD/2 Short VREF and REFSENSE Together AVDD/2 AVDD/2 29 REFTS and REFBS Are Shorted Together for Input 2 2 V AVDD/2 AGND No Connect AVDD/2 AVDD/2 External Ref AIN 2 V max AVDD AVDD No Connect Span = REFTS 21, 22 – REFBS (2 V max) AGND Short to Short to 23 VREFTF VREFBF AD876-8 AIN 2 V Float or AVDD No Connect Short to Short to 30 AVSS VREFTF VREFBF 0 –9 1.0E+6 1.0E+9 1.0E+7 1.0E+8 –3 –6 FREQUENCY – Hz –12 –15 –18 –21 –24 Figure 13. Full Power Bandwidth 50 40 –50 0 3.0 1.0 2.0 30 20 –10 –20 –30 INPUT VOLTAGE – V 10 0 –40 2.5 0.5 1.5 REFBS = 0.5V REFTS = 2.5V CLOCK = 32MHz Figure 14. Input Bias Current vs. Input Voltage APPLYING THE AD9280 THEORY OF OPERATION The AD9280 implements a pipelined multistage architecture to achieve high sample rate with low power. The AD9280 distrib- utes the conversion over several smaller A/D subblocks, refining the conversion with progressively higher accuracy as it passes the results from stage to stage. As a consequence of the distrib- uted conversion, the AD9280 requires a small fraction of the 256 comparators used in a traditional flash type A/D. A sample- and-hold function within each of the stages permits the first stage to operate on a new input sample while the second, third and fourth stages operate on the three preceding samples. OPERATIONAL MODES The AD9280 is designed to allow optimal performance in a wide variety of imaging, communications and instrumentation applications, including pin compatibility with the AD876-8 A/D. To realize this flexibility, internal switches on the AD9280 are used to reconfigure the circuit into different modes. These modes are selected by appropriate pin strapping. There are three parts of the circuit affected by this modality: the voltage reference, the reference buffer, and the analog input. The nature of the appli- cation will determine which mode is appropriate: the descrip- tions in the following sections, as well as Table I should assist in selecting the desired mode. REV. E |
同様の部品番号 - AD9280ARSZ |
|
同様の説明 - AD9280ARSZ |
|
|
|
リンク URL |
| プライバシーポリシー |
| ALLDATASHEET.JP |
| ALLDATASHEETはお客様のビジネスに役立ちますか？ [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
| 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 |
Japanese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
