STM32 MCUs products

STM32L562QEI6 OPAMP Input pin floating?

Hello,I'm working with STM32L562QEI6 mcu for a project. I don't need OPAMP so it will be disabled by software, but on the PCB can I leave the pins floating or connected to ground?There are two OPAMP input pins and they are dedicated, they can't be GP...

F303 OP AMP related inquiry

I want to control the OP AMP using F303. I opened all OP AMPs and received ADC values in the form of Follower, but OP AMP4 does not work. What's the problem?

Why does my Opamp PGA seem to be 10, not 16?

Hi,I have a board, with STM32f303. It generally works fine, but I am using the opamps and they are causing me trouble. I have set them up to have PGA of 16, and be internally connected to the ADC, and have test points on my board where I can measure ...

What is the purpose of the U7 op amp on Nucleo-144 boards?

Hi, as the title asks. On my STM32F767 Nucleo board, there is an Op Amp U7 (TSV631AILT) that buffers user LD1 connected to a pin (either PB0 or PA5). What is the purpose for this? I'm sure it's obvious but it's not standing out to me and there's no ...

Resolved! internal DAC (DAC3) connection to OPAMP1 - no output from OPAMP

Hey,I'm using: STM32G431, NUCLEO-G431RBI would like to connect DAC3 - internally to the OPAMP and take the OPAMP1 output. I have an array I want to transfer to the dac3 via DMA, the timing is controlled by tim2. Then having DAC3 to be the non-inverti...

What ADC sampling time to use with Opamp in follower mode? What is Opamp's output impedance in follower mode connected to the ADC?

DS12288 doesn't specify the opamp block's output impedance.Table 67, page 143 has the ADC sampling time for different RAIN but since the opamp's output impedance isn't known, we cannot pick the right sampling time.

Op-Amp on STM32G474RE

I have been trying to program the Op-Amps on STM32G474RE using the latest STM32CUBEG4 version 1.2 and my version of STM32CUBEMX is version 5.6.1. I am trying to get PGA mode to work. In STM32CUBEMX, I selected PGA connected. When I tried to bias one...

Hi guys, I'm using STM32G431 board and trying to use the internal OpAmp in standalone mode using Low Level Drivers (LL Drivers). The Opamp works fine in follower mode, but not in standalone mode. Can anyone suggest what might be the problem? Thanks in adv

Please find the code here, SET_BIT(RCC->APB2ENR, RCC_APB2ENR_SYSCFGEN); LL_OPAMP_SetMode (OPAMP2, LL_OPAMP_MODE_FUNCTIONAL); LL_OPAMP_SetFunctionalMode (OPAMP2,LL_OPAMP_MODE_STANDALONE); LL_OPAMP_SetInputNonInverting (OPAMP2, LL_OPAM...

STM32G431 OPAMP in PGA mode: noisy output?

Hi all,I'm using STM32G431, the opamp1 and opamp2 are set as follows:the generated codes: hopamp1.Instance = OPAMP1; hopamp1.Init.PowerMode = OPAMP_POWERMODE_NORMAL; hopamp1.Init.Mode = OPAMP_PGA_MODE; hopamp1.Init.NonInvertingInput = OPAMP_N...

Resolved! Questions about this circuit and a solution

Hi,Master:Platform: STM32F301K8UAs shown below in Figure 1, PA7 (MCU_14) is a video signal (As shown below in Figure 2), which contains the line sync signal (A area in Figure 2, fixed frequency, there may be noise)and the field sync signal(B area...