Moteur de recherche de fiches techniques de composants électroniques |
|
AD5539SQ Fiches technique(PDF) 9 Page - Analog Devices |
|
AD5539SQ Fiches technique(HTML) 9 Page - Analog Devices |
9 / 16 page AD5539 –9– REV. B Figures 21 and 22 show the small and large signal pulse re- sponses of the general purpose inverter circuit of Figure 17, with CLEAD = 1.5 pF, RLAG = 330 Ω and C LAG = 3.5 pF. Figure 21. Small Signal Pulse Response of the (Figure 17) Inverter Circuit; Vertical Scale: 50 mV/div; Horizontal Scale: 5 ns/div Figure 22. Large Signal Response of the (Figure 17) Inverter Circuit; Vertical Scale: 200 mV/div, Horizontal Scale: 5 ns/div A CLEAD capacitor may be used to limit the circuit bandwidth and to achieve a single pole response free of overshoot –3 dB frequency = 1 2 π R2 C LEAD If this option is selected, it is recommended that a CLEAD be connected between Pin 12 and the summing junction, as shown in Figure 23. Pin 12 provides a separately buffered version of the output signal. Connecting the lead capacitor here avoids the excess output-stage phase shift and subsequent oscillation prob- lems (at approx. 350 MHz) which would otherwise occur when using the circuit of Figure 17 with a CLEAD of more than about 2 pF. Figure 24 shows the response of the circuit of Figure 23 for each connection of CLEAD. Lag components may also be added to this circuit to further tailor its response, but, in this case, the results will be slightly less satisfactory than connecting CLEAD directly to the output, as was done in Figure 17. Figure 23. A Gain of 2 Inverter Circuit with the CLEAD Capacitor Connected to Pin 12 Figure 24. Response of the Circuit of Figure 23 with CLEAD = 10 pF A General Purpose Voltage Follower Circuit Noninverting (voltage follower) circuits pose an additional com- plication, in that when a lag network is used, the source imped- ance will affect the noise gain. In addition, the slightly greater bandwidth of the noninverting configuration makes any excess phase shift due to the output stage more of a problem. For example, a gain of 3 noninverting circuit with CLEAD con- nected normally (across the feedback resistor – Figure 25) will require a source resistance of 200 Ω or greater to prevent UHF oscillation; the extra source resistance provides some damping as well as increasing the noise gain. The frequency response plot of Figure 26 shows that the highest –3 dB frequency of all the applications circuits can be achieved using this connection, un- fortunately, at the expense of a noise gain of 14.2. |
Numéro de pièce similaire - AD5539SQ |
|
Description similaire - AD5539SQ |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |