Electronic Components Datasheet Search |
|
LMH6628MAEP Datasheet(PDF) 11 Page - National Semiconductor (TI) |
|
|
LMH6628MAEP Datasheet(HTML) 11 Page - National Semiconductor (TI) |
11 / 16 page (SOIC) dual op amp evaluation board as a guide for high fre- quency layout and as an aid in device evaluation. ANALOG DELAY CIRCUIT (ALL-PASS NETWORK) The circuit in Figure 1 implements an all-pass network using the LMH6628EP. A wide bandwidth buffer (LM7121) drives the circuit and provides a high input impedance for the source. As shown in Figure 2, the circuit provides a 13.1ns delay (with R = 40.2 Ω, C = 47pF). R F and RG should be of equal and low value for parasitic insensitive operation. 20088601 FIGURE 1. 20088602 FIGURE 2. Delay Circuit Response to 0.5V Pulse The circuit gain is +1 and the delay is determined by the fol- lowing equations. (1) (2) where T d is the delay of the op amp at AV = +1. The LMH6628EP provides a typical delay of 2.8ns at its −3dB point. FULL DUPLEX DIGITAL OR ANALOG TRANSMISSION Simultaneous transmission and reception of analog or digital signals over a single coaxial cable or twisted-pair line can re- duce cabling requirements. The LMH6628EP's wide band- width and high common-mode rejection in a differential amplifier configuration allows full duplex transmission of video, telephone, control and audio signals. In the circuit shown in Figure 3, one of the LMH6628EP's amps is used as a "driver" and the other as a difference "re- ceiver" amplifier. The output impedance of the "driver" is essentially zero. The two R's are chosen to match the char- acteristic impedance of the transmission line. The "driver" op amp gain can be selected for unity or greater. Receiver amplifier A 2 (B2) is connected across R and forms differential amplifier for the signals transmitted by driver A 2 (B 2). If RF equals RG, receiver A2 (B1) will then reject the sig- nals from driver A 1 (B1) and pass the signals from driver B1 (A 1). 20088603 FIGURE 3. The output of the receiver amplifier will be: (3) Care must be given to layout and component placement to maintain a high frequency common-mode rejection. The plot of Figure 4 shows the simultaneous reception of signals trans- mitted at 1MHz and 10MHz. 11 www.national.com 200886 Version 4 Revision 2 Print Date/Time: 2010/10/15 15:22:20 |
Similar Part No. - LMH6628MAEP |
|
Similar Description - LMH6628MAEP |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |