Figure 44 of the AD8235 Data sheet shows the device paired with AD8609 in a hi-pass configuration with break at 0.3 Hz. The AD8609 has very high voltage noise at this frequency. Fundamental of Heart Beat is about 1 Hz with content to about 60 Hz.
As…
Hi,
I've been using the AD8236 to make an EMG amplifier. I connected a second order low pass MFB butterworth filter at @20Hz cutoff , which filters the AD8236 output and feeds it to the reference pin. I am not pleased with the results. while the DC correction…
Dear Sir/Madam,
Our customer asked the following questions.
1)What is the t1 and t2 time when AD8235 shutdown? (Refer to the following figure)
2)When AD8235 is shudowning, what is the Vout condition? Impedance high, correct?
I could not catch these…
Oscillation with 500uV peak input.docx
Hi Kris,
I have uploaded a document describing the issue
1. OP462，功能类似
2. AD8235/36/31可以作为参考
I just laid out a PCB with an AD8235 in-amp on it & had it built when I realized that I messed it up.
When I created the AD8235 part in the schematic, I made the IN+ & the IN- pins backwards, which meant that the board was laid out wrong. Instead…
Hello AD engineers,
Two information are missing on the AD8235 datasheet:
- How long shall it takes to come back from shutdown. In simulation model it is pretty quick < 10µs then it start a normal behavior from VCC/2 (ref = Vneg = 0V, Vpos = VCC =…
Hi Rob,
I also noticed that the operation supply voltage of the AD4004 is +/- 5V to +/- 15V. Can you confirm that you're providing correct supply voltage and setup for the AD4004? Because if not, the problem might be on the AD4004 and not on the AD8235…
Olivares2,
There are some minor differences, but the major ones are the AD624 is wider temp and lower offset.
Depending on what your supply voltages are, the gain you need, and the highest signal frequency,
you could look at the AD8422, AD8237, AD8421…
Hello SouthPacific,
Kindly forward your request to your local sales team. You can check the link below for the right contact. They should be able to see to your request.
Sales and Distribution | Analog Devices
Also, we do have the AD8235, which is…