 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
LTC6945 датащи(PDF) 20 Page - Linear Technology |
|
|
|||||||||||||||||||||||||||||
LTC6945 датащи(HTML) 20 Page - Linear Technology |
|
|
20 / 36 page  LTC2270 20 2270f APPLICATIONS INFORMATION Figure 5. Recommended Front-End Circuit for Input Frequencies Above 80MHz Amplifier Circuits Figure 6 shows the analog input being driven by a high speed differential amplifier. The output of the amplifier is AC-coupled to the A/D so the amplifier’s output common mode voltage can be optimally set to minimize distortion. If DC coupling is necessary, use a differential amplifier with an output common mode set by the LTC2270 VCM pin (Figure 7). Figure 4. Recommended Front-End Circuit for Input Frequencies from 5MHz to 80MHz Reference The LTC2270 has an internal 1.25V voltage reference. For a 2.1V input range using the internal reference, connect SENSE to VDD. For a 1.05V input range using the internal reference, connect SENSE to ground. For a 2.1V input range with an external reference, apply a 1.25V reference voltage to SENSE (Figure 9). The input range can be adjusted by applying a voltage to SENSE that is between 0.625V and 1.30V. The input range will then be 1.68 • VSENSE. The VREF, REFH and REFL pins should be bypassed as shown in Figure 8. A low inductance 2.2μF interdigitated capacitor is recommended for the bypass between REFH and REFL. This type of capacitor is available at a low cost from multiple suppliers. 25Ω 12Ω 12Ω 25Ω 50Ω 0.1μF AIN + AIN – 8.2pF 1μF VCM ANALOG INPUT 0.1μF 0.1μF T1 T2 T1: MA/COM MABA-007159-000000 T2: COILCRAFT WBC1-1TL RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE 2270 F04 LTC2270 25Ω 25Ω 50Ω 0.1μF AIN + AIN – 1.8pF 1μF VCM ANALOG INPUT 0.1μF 0.1μF T1 T2 T1: MA/COM MABA-007159-000000 T2: COILCRAFT WBC1-1TL RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE 2270 F05 LTC2270 25Ω 25Ω 200Ω 200Ω 0.1μF AIN + AIN – 1μF 12pF 12pF VCM LTC2270 2270 F06 – – + + ANALOG INPUT HIGH SPEED DIFFERENTIAL AMPLIFIER 0.1μF 25Ω 25Ω AIN + AIN – 1μF 25pF 25pF VCM LTC2270 2270 F07 – + + – ANALOG INPUT CM Figure 6. Front-End Circuit Using a High Speed Differential Amplifier Figure 7. DC-Coupled Amplifier |
|
ссылки URL |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | Ссылка на техническое описание | обмен ссыками | поиск по производителю 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 |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
