Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
User18151
Level 3
Level 3
First like received First solution authored
Hi all,

In AURIX™ TC27x, what are the differences between VADC (Versatile Analog-to-Digital Converter) and DSADC (Delta-Sigma Analog-to-Digital Converter)?

Best regards,
Christine

#8042000 20774
0 Likes
2 Replies
User18237
Level 5
Level 5
First solution authored First like received
Hi Christine,

VADC(Versatile Analog-to-Digital Converter) is one of multi-functionalities hardware module that converts analog signal to digital signal with MCU VADC channel pins. It consists of up to 8 channels pins in TC27x. For more details VADC, please refer to TC27x user manual document.

DSADC (Delta-Sigma Analog-to-Digital Converter): It is designed specifically to convert resolver signal sine and cosine information into digital representation of input angle and velocity. DSADC come with built-in on-chip carrier generator which produces a selectable output signal (sine, triangle, rectangle) which can be used to simulate resolver signal. Alternatively, we can configure synchronization of each DSADC input signals to carrier signal to compensate error of angle.

In short, this hardware module converts analog resolver input signal to position information. It does not require external monolithic sensor IC.

DSADC modulator clock frequency is 20Mhz, VADC reference clock is about 1M~ 2Mhz.

Best regards,
Mr. AURIX™
0 Likes
User20784
Level 1
Level 1
can DSADC be used to measure constant voltage like 3.5 V from external sensors?
i have a saftey requirment in tc39XX in which we need to implemnt , diverse redundency ,
in U9 pin, EVADC_G0CH3 , will have same out put on EDSADC_EDS0NA... not sure if i need to configure EDSADC moudle completly just to read out the redundent result,
since dsadc is a differential ADC how to measure input from single AN3 input ? will it need two input ?
0 Likes