sonicmook56
Well-known member
Hi-
I want to use an opa 2604 op amp as a buffer setup like the model on page 12 (figure 9) on the datasheet. I’m not an EE, so please excuse any ignorance.
http://focus.ti.com/lit/ds/sbos006/sbos006.pdf
The worst case load senearo, this buffer will need to drive around 500ohms, (best 640ohms) at unity gain.
A coupe of questions for you guys –
1. Whats the function of R1 in this model?
2. My math says if R2 is 0ohms, then It will be unity. Is there a better way to use R1/R2 to get unity gain?
3. Does Vout/ Itotal give the absolute load this buffer can drive? I get about 25 ohms.
Gain 3.472=3.472(1+0/20000)
Output load 3.472/0.1361 = 25.51ohms?? dosent seem like a real figure to me.
Thanks
:guinness: :guinness:
edited for clarity
I want to use an opa 2604 op amp as a buffer setup like the model on page 12 (figure 9) on the datasheet. I’m not an EE, so please excuse any ignorance.
http://focus.ti.com/lit/ds/sbos006/sbos006.pdf
The worst case load senearo, this buffer will need to drive around 500ohms, (best 640ohms) at unity gain.
A coupe of questions for you guys –
1. Whats the function of R1 in this model?
2. My math says if R2 is 0ohms, then It will be unity. Is there a better way to use R1/R2 to get unity gain?
3. Does Vout/ Itotal give the absolute load this buffer can drive? I get about 25 ohms.
Gain 3.472=3.472(1+0/20000)
Output load 3.472/0.1361 = 25.51ohms?? dosent seem like a real figure to me.
Thanks
:guinness: :guinness:
edited for clarity