Hi,
i would like to ask you a question about output linearity, Fig13 and Fig14 (datasheet page 8).
I suppose the input voltage scale of the Figures seems to be incorrect...
For example, in case input is around 1.6V then output is 60V @Vbst=105V/Gain =40.7dB.
I think in case input is 1.6V, output will be 1,6*40,7dB = 173V ---> 86.4V.
Will you tell me what is my misunderstanding?
Thank you for your support.
Best Reards,
Suzuki-san,
This is a good question. I searched for more information about it and it seems that the DRV2700 has input resistors dividers to select the gain. In case of the 40.7dB, there's a 10K array like this:
For example, when you input 1V: IN+ = 1*(2/3) and IN- = 1*(1/3). Vin,diff = 1/3 and Vout should = 36V.
For example, when you input 3V: IN+ = 3*(2/3) and IN- = 3*(1/3). Vin,diff = 1 and Vout should = 108V.
I hope this makes sense. Please let me know if you have additional questions or comments.
Best regards,
Luis Fernando Rodríguez S.
