STM32F303ZE Reference Manual clarification needed.

[m4l490n]

Posted on August 24, 2017 at 22:04

Hello

I'm about to start a project and the

STM32F303ZE

seems like a perfect part. I was reading through the Reference Manual and I found in the section 15.3.11 Channel selection (SQRx, JSQRx) that the ADC1 is connected to 4 internal analog inputs:

� ADC1_IN15 = VREFOPAMP1 = Reference Voltage for the Operational Amplifier 1 (

in STM32F303xB/C

and

STM32F358xC

)

� ADC1_IN16 = VTS = Temperature Sensor

� ADC1_IN17 = VBAT/2 = VBAT channel

� ADC1_IN18 = VREFINT = Internal Reference Voltage (also connected to ADC2_IN18, ADC3_IN18 and ADC4_IN18).

And I don't know if it's a document error or if the ADC1 really does not have a connection to the 

VREFOPAMP1 on STM32F303xD/E parts. It's confusing because for example for ADC3 we read:

ADC3_IN17 = VREFOPAMP3 = Reference Voltage for the Operational Amplifier 3 (

in STM32F303xB/C/D/E

and STM32F358C)

And there is explicitly stated that the connection for ADC3 includes STM32F303xD/E

parts.

Anyway, I'd like to verify that the connection between the ADC1 and the OPAMP1 is also present in the STM32F303ZE.

Thanks!

#reference-manual #stm32f303-adc

[Imen.D · Accepted solution]

Posted on August 29, 2017 at 15:29

Hello

Malagon.Manuel

,

I confirm that the connection between ADC1 and OPAMP1 is present in all STM32F303Zx (present in STM32F303ZE)

This signal is not applicable for STM32F303x6/8 and STM32F328 devices (without OPAMP1) which are covered by the same reference manual.

So, the reference manual RM0316 should be updated to add the connection between ADC1 and VREFOPAMP1 for STM32F303xD/E et STM32F

– ADC1_IN15 = VREFOPAMP1 = Reference Voltage for the Operational Amplifier 1

(in STM32F303xB/C

and STM32F358xC)

This line should be :

STM32F303xB/C/D/E, STM32F358 and STM32F398

.

Best Regards

Imen

[m4l490n]

Posted on August 30, 2017 at 16:24

DAHMEN.IMEN

‌

Thanks for the clarification!

Regards

Manuel Malagon