In low power mode: ADA4805-2, ADA4841-2, ADA4945-1,and ADA4940-1.
In median mode: ADA4805-2, ADA4807-2, ADA4940-1,and ADA4945-1.
In fast power mode: ADA4807-2, ADA4896-2, ADA4899-1,ADA4940-1, and ADA4945-1.
I used the ADA4945-1 as ADC front-end (LTC2380-24) with supply rails centered to ADC 2.5V Vref ( Vcc= +7.5 / Vee = -2.5V for 10V total supply).
The FDA is configured as fully differential filter, with 2 cutoff frequencies. 2 small relays allow…
Please clarify the MODE polarity of the ADA4945-1 in the datasheet.
I am looking for the Spice model of the ADC driver (ADA4945-1).
If you can use the LTC1403-1, an easy solution is to use a fully differential amplifier like the ADA4945 between your filter circuit and the ADC input. Use the same +/-3V supplies for the ADA4945. Use figure 104 of the ADA4945 data sheet and connect VOCM…
In addition, if the signal chain before the driver is fully differential then an very high common mode rejection differential amplifier is an LT5401 with the ADA4945-1.
The recommended drivers for AD7768 are ADA4945-1, ADA4896-2, ADA4940-1 for Fast Power Mode; ADA4945-1, LTC6363, ADA4805-2 for Low Power Mode; and ADA4945-1, ADA4807-2, ADA4940-1 for Median Power Mode. The AD7768 can operate up to 5V analog supply so…
Couple of things:
1. You cannot run the ADA4945 off 20V supplies (+/-10V) as you have it configured. Change your supplies to +/-5V instead.
2. You have left the "Mode" tied to ground. You should either tie it V+ or V- depending on the operating…