AN4651 datasheet(20/34 Pages) STMICROELECTRONICS

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Interconnection descriptions

AN4651

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DocID027426 Rev 1

Table 6 shows the timers to ADC1 connections for STM32F37x devices.

3.5

From OPAMP to ADC

There are two interconnection types:



Connection of OPAMP output reference voltage to an internal ADC channel,



Connection of OPAMPx (x = 1 to 4) output to ADCy (y = 1 to 4) channels.

Connection of OPAMP output reference voltage to an internal ADC channel.

This connection can be used for OPAMP calibration.

Table 7 provides information on the channels to use for the connections.

Connection of OPAMPx (x = 1 to 4) output to ADCy (y = 1 to 4) channels.

Table 8 details the connection settings.

The gray shading in table cells means Not Applicable.

Table 6. STM32F37x: Internal signals from timers to ADC1

Regular channels

Injected channels

TIM2

TIM2_CC2

TIM2_TRGO

TIM2_CC1

TIM3

TIM3_TRGO

TIM3_CC4

TIM4

TIM4_CC4

TIM4_TRGO

TIM19

TIM19_TRGO

TIM19_CC3

TIM19_CC4

TIM19_CC1

TIM19_CC2

Table 7. VREFOPAMPx to ADC channel

VREFOPAMPx

ADC channel

Description

VREFOPAMP1

ADC1_IN15

Reference Voltage for the Operational Amplifier 1

VREFOPAMP2

ADC2_IN17

Reference Voltage for the Operational Amplifier 2

VREFOPAMP3

ADC3_IN17

Reference Voltage for the Operational Amplifier 3

VREFOPAMP4

ADC4_IN17

Reference Voltage for the Operational Amplifier 4

Table 8. OPAMP output to ADC input

OPAMPx output

ADC channel

Used pins

OPAMP1_VOUT

ADC1_IN3

PA2

OPAMP2_VOUT

ADC2_IN3

PA6

OPAMP3_VOUT

ADC3_IN1

PB1

OPAMP4_VOUT

ADC4_IN3

PB12

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