In the design, more than one AD698 is used for multiple sensor interfacing. but only one excitation is required for all sensors. In order to avoid any beat frequencies, how the sine outputs from other ICs can be suppressed? whether shorting the freq fixing…
I need to synchronize several AD698s. Is there any option how to connect an external oscillator to AD698 or any possibility how to achieve that?
Hi, i am a student of shnu.
I just follow the schematic of cn0301 to rebuild the PCB.
But i found if i plug in the AD698 . The AD698 will make a sound or squeal.
It seems like if the AD698 is pluged in,the output will have a ramp ripple.
what is the…
First of all, you do not need to order a new board; but since you are using a different LVDT sensor, you will have to replace the AD698 gain resistor and offset resistor with different values.
The resistors used to set the gain are R9 and…
I met a issue during I tuning AD698. I refer to the figure 7 on Page 6 in AD698 SPEC to do our design.
If I mounting the circuit follow the figure 7, the output of AD698 didn't changed with the changes of LVDT sensor.
But, if I connect…
AD698's datasheet states that the sine wave's excitation frequency range is from 20Hz to 20kHz. However, in our experiment(we've tried more than 5 pcs AD698), when the excitation frequency was set to 30kHz with the external capacitor, AD698 could still…