One of potential applications of ADA4700-1 is a piezo driver, but solutions presented in the datasheet work up to 100nF only, while my piezo has 1.5uF. Could you suggest a circuit which would work fine in such a case? I need to work with the frequencies from DC up to 35 kHz
for R = 100 Ohm and C = 1.5 uF we have fg = 1 / (2 * pi * R * C) = approx. 1 kHz, while I need 35 kHz
Take a look at: Analog Devices: Analog Dialogue: Ask The Applications Engineer - 25
You can start by just adding Riso of about 100 ohms and see what the transient response is.
I would like to point out the max safe output current drive of the ADA4700-1 is about 30mA. Let's call that our peak current even if that's a bit conservative. 30mA into 1.5µF imposes an output 'slew rate' of about 0.02V/µs. At 35kHz, you would be able to get a sine wave with about 90mV peak before running into this limit. I'm assuming you will need to build a discrete power transistor output stage like Figure 68 or Figure 69 in the datasheet anyway just to get enough output current to drive your piezo.
Then you will have to use the last schematic. Note there is an error: the two inputs are swapped.
Shoot! I was thinking about the ADA4870, which is 1 Amp out.