LTC6268 datasheet, Electrical Characteristics tables on pages 4 and 5 say that the typical open loop voltage gain is about 20 V/mv (for RL = 100 Ohm) and about 250 V/mv (for RL = 10 kOhm). However, what is supposedly the open loop gain and phase response on page 9 (top right figure) shows a dc voltage gain of only about 1000.
what is the correct open loop DC gain?
i am using LTC6269 with supply of 0~3v and common mode voltage of 1.65V
The typical open loop gain values in page 4 and page 5 are correct open loop DC gain, these are the values at very low frequency.
On page 9, the plot shows open loop gain starting at 100kHz, take note…
On page 9, the plot shows open loop gain starting at 100kHz, take note the x-axis values is in MHz.
If you are using supply of 0 ~ 3V, refer to page 5 for value of open loop DC gain.