AFE58JD28: AFE5828 Analog VCNTL

sunmi yeo

Part Number: AFE58JD28
Other Parts Discussed in Thread: OPA2209

I tried to configure the circuit to have a range of -0.4 V to +0.4 V in CVNTLP, VCNTLM.
However, the circuit is not working..
U18's OUTPUT does not change even though the DAC OUTPUT value is changed.
Is there anything wrong with U18?

6 months ago

0 Shabbir Amjhera Wala 6 months ago

TI__Expert 4481 points

What is R51 and R41 resistor values?

Regards,

Shabbir

0 sunmi yeo 6 months ago

Prodigy 40 points

It's now Unloaded, and the resistance value is 348ohm.

0 sunmi yeo 6 months ago in reply to Shabbir Amjhera Wala

Prodigy 40 points

I think there is an error in the circuit.
Pin #3/5 of u18(OPA2209) should be connected to GND. And it seems that pin #1,4 which is OUTPUT should be connected to pin #2/6.
Is that right? And in between, it connects to 22pF.

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AFE58JD28: AFE5828 Analog VCNTL