TL064: Regarding KSVR

Hi Higa, 

The DC PSRR is not expected to be significantly different from the datasheet specification at the lower supply voltage if you are using at lower frequencies. 

How much variation on the power supply are you expecting? 

Regards,
Ashley

HI Ashley-san

You said : How much variation on the power supply are you expecting? 

-> 10mVp-p/10kHz

Best regards,

Higa

Hi Higa-san, 

I can verify what the PSRR difference will be in the lab for a small sample set but this be for information only and not guaranteed performance. I should be able to get some data by mid-next week and will update this thread.

Regards,
Ashley

Hello Higa,

In the data sheet, minimum CMRR and KSVR are the same and a DC spec. Therefore I would expect that a IQ vs supply voltage chart could be used to estimate the difference in CMRR and KSVR

Between +/-9V and +/-15V there is a 28 pixel difference. Between +/-9V and +/-5.125V there is a 29 pixel difference. Therefore it is reasonable to assume  that offset change +/-5.125V to +/-15V is about twice the offset change +/-9V to +/-15V

The min spec is 80dB that represents a 1.2mV maximum change. Twice would be 2.4mV 

For AC, compare the slope at 5.125V and the slope of 9:15

Pixel slope near 5.125V is 0.247 ; Pixel slope 9:15 is 0.247 = 0.124

Is not a surprise that AC PSRR should be half as good as 9 to 15V AC PSRR