I design electrodrive micromotor. Micromotor supply 3 sinusoid with variable-amplitude and frequency (0-53 Hz or 0-106 Hz; 540 point on period). Configuration chanel(1 faze): DAC AD7538 with AD8675,summarizeAD8675, filter 1 or 2 degree on AD8675, power…
Apologies for the delayed response. The AD8676 spice model is currently being modified. For the meantime, you may use the AD8675 model instead. AD8676 is a dual of AD8675.
Vdd = +10V
Vss = -10V
Vcc = +3.3V
VrefP = +5V
VrefN = -5V
AGND is connected with DGND
The DAC is connected to output amplifier (AD8675). The AD8675 is connected to a third party chip ADC input.
2. Is the front-end amp in a de-compensate state? i.e., the minimal gain of front-end amp should be at least 5 or more. Do I need a small capacitor between Vout of ADA4637 and the inverting pin?
3. I would like to use AD8675 as the front-end op-amp, where…
There is a reason why we suggest the AD8676 and AD8675 on the AD5791 data sheet.
If you have not done RF/microwave pcb's, the AD797 is extremely difficult to tame.
You need a clean four layer board with all metalization removed below the inputs…
Apologies for the late response.
You may want to take a look at the EVAL-AD5760SDZ. The AD5760 will satisfy the 0-10V output requirement. It comes with the AD8675 opamp but is limited to produce current of upto 35mA. You can replace the AD8675
I am currently simulating with the AD8675.
If I use it with common feedback stuff. It works.
But the output can reach kilovolts with a supply of +/- 15V
On the other hand, on a particular setup, I do get some other strange behavior…
I experience phase reversal respectively input latch-up problems in a AD8675 buffer application and found this QA as only reference. Particularly the topic isn't discussed in the datasheet.
Saying no phase reversal as long as the input voltage…