Os motores de busca de Datasheet de Componentes eletrônicos |
|
AD841KN Folha de dados(PDF) 8 Page - Analog Devices |
|
AD841KN Folha de dados(HTML) 8 Page - Analog Devices |
8 / 8 page AD841 REV. B –8– Figure 25. Circuit for Driving a Large Capacitive Load USING A HEAT SINK The AD841 draws less quiescent power than most precision high speed amplifiers and is specified for operation without a heat sink. However, when driving low impedance loads, the cur- rent to the load can be 4 to 5 times the quiescent current. This will create a noticeable temperature rise. Improved performance can be achieved by using a small heat sink such as the Aavid Engineering #602B. TERMINATED LINE DRIVER The AD841 functions very well as a high speed line driver of ei- ther terminated or unterminated cables. Figure 26 shows the AD841 driving a doubly terminated cable in a follower configu- ration. The AD841 maintains a typical slew rate of 300 V/ µs, which means it can drive a ±10 V, 4.7 MHz signal or a ±3 V, 15.9 MHz signal. The termination resistor, RT, (when equal to the characteristic impedance of the cable) minimizes reflections from the far end of the cable. A back-termination resistor (RBT, also equal to the characteristic impedance of the cable) may be placed between the AD841 output and the cable in order to damp any stray sig- nals caused by a mismatch between RT and the cable’s charac- teristic impedance. This will result in a “cleaner” signal, but since 1/2 the output voltage will be dropped across RBT, the op amp must supply double the output signal required if there is no back termination. Therefore the full power bandwidth is cut in half. If termination is not used, cables appear as capacitive loads. If this capacitive load is large, it should be decoupled from the AD841 by a resistor in series with the output (see above: Driving a Capacitive Load). Figure 26. Line Driver Configuration OVERDRIVE RECOVERY Figure 27 shows the overdrive recovery capability of the AD841. Typical recovery time is 200 ns from negative overdrive and 700 ns from positive overdrive. Figure 27. Overdrive Recovery Figure 28. Overdrive Recovery Test Circuit E-20A 20-Terminal Leadless Ceramic Chip Carrier 12-Lead Metal Can Package (TO-8 Style) 14-Pin Cerdip (Q) Package 14-Pin Plastic (N) Package OUTLINE DIMENSIONS Dimensions shown in inches and (mm). |
Nº de peça semelhante - AD841KN |
|
Descrição semelhante - AD841KN |
|
|
Ligação URL |
Privacy Policy |
ALLDATASHEETPT.COM |
ALLDATASHEET é útil para você? [ DONATE ] |
Sobre Alldatasheet | Publicidade | Contato conosco | Privacy Policy | roca de Link | Lista de Fabricantes 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 |