OUTPUT INTERFACING

The CLC007’s class AB output stage, Figure 6, requires no

standing current in the output transistors and therefore re-

quires no biasing or pull-down resistors. Advantages of this

arrangement are lower power dissipation and fewer external

components. The output may be either D.C. or A.C. coupled

to the load. A bandgap voltage reference sets output voltage

levels which are compatible with F100K and 10K ECL when

correctly terminated. The outputs do not have the same out-

put voltage temperature coefficient as 10K. Therefore, noise

margins will be reduced over the full temperature range

DS100085-6

FIGURE 3. DC Coupled Input

DS100085-7

FIGURE 4. Single Ended 50

Ω ECL Input

DS100085-8

FIGURE 5. Differential 50

Ω ECL Input

www.national.com

4