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# TMDSRSLVR_v1.0: Resolver to Digital Conversion Implementation on C2000 MCUs

In this paper "Resolver to Digital Conversion Implementation on C2000 MCUs" which can find in C:\ti\controlSUITE\development_kits\TMDSRSLVR_v1.0\~Docs,
I was wondering what is the input and output voltage range of resolver using in this paper according to Fig. 5 Hardware schematic diagram.

Thanks,

Kevin

### 6 Replies

• Hi Kevin,

This Resolver kit has : Tamagawa – TS2640N321E64 Resolver

Here are the specs for the input: http://www.tamagawa-seiki.com/english/lvdt/post-1.html#a2

Output logic would be 3.3V same as MCU Vcc.

Regards,

Gautam

Are You A Beginner or New to TI's C2000™ Family? Do Check This Book!

• In reply to Gautam Iyer:

Hi Gautam,

Tamagawa – TS2640N321E64 Resolver, the specs for the input is AC7Vrms, 10KHz, so the input voltage to Resolver Primary in this paper according to Fig. 5 Hardware schematic diagram is -10~10V sine wave?

Kevin

• In reply to Kai-Wen Huang:

Kai-Wen Huang
Tamagawa – TS2640N321E64 Resolver, the specs for the input is AC7Vrms, 10KHz, so the input voltage to Resolver Primary in this paper according to Fig. 5 Hardware schematic diagram is -10~10V sine wave?

I guess, the schematic indicated the Vpeak value and not RMS. If so then:

Vpeak = 1.414 × Vrms

Vpeak = 1.414*7 = 9.898V ~~ 10V

Regards,

Gautam

Are You A Beginner or New to TI's C2000™ Family? Do Check This Book!

• In reply to Gautam Iyer:

Hi Gautam,

yea, but i was wondering what is the input  voltage range? Is it from 0~10V(sine wave)?  The OPA2209 for the low pass filter in stage 2, the output is set a limit to "0~15V". It wouldn't output the negative voltage.

Thanks,

Kevin Huang

• In reply to Kai-Wen Huang:

Kai-Wen Huang
yea, but i was wondering what is the input  voltage range? Is it from 0~10V(sine wave)?  The OPA2209 for the low pass filter in stage 2, the output is set a limit to "0~15V". It wouldn't output the negative voltage.

Yes, its 0 to 10V (sine wave).

Regards,

Gautam

Are You A Beginner or New to TI's C2000™ Family? Do Check This Book!

• In reply to Gautam Iyer:

Hi Gautam,

I was confused.

TS2640N321E64 Resolver, the specs for the transformation ratio is 0.5.

If the input of the resolver primary is 0~10V (sine wave), the output of the resolver would be 0~5V(sine wave). The hardware TLV2772 performs the 1.65V level shifting so it's gonna be 1.65~6.65V(sine wave). It doesn't fit the ADC range, that is 0~3.3V.