I'm trying to incorporate ADA4004 in my next audio design as a low power replacement of OPA1612. Is there any data on its THD?
Thanks. But I need a chip that is low power and small. 3mm*3mm for a dual amp or 4mm*4mm for a quad amp. BGA/CSP is a bonus. OPA1612 is available in 3mm*3mm DFN for two channels, and ADA4004-4 is available in 4mm*4mm QFN for four channels. AD8599 is not available in small packages, and AD8597 takes the same 3mm*3mm, but only offers a single channel.
Also, I did a SPICE simulation with LTSpice and the ADA4004 SPICE model provided by ADI, and it shows virtually no THD (<-135dB at 1kHz). Can I trust that data?
FYI, my bench circuit is a class AB buffer stage with diode bias, directly driven by ADA4004, and the output of the buffer has a 200R load. Test waveform is 10Vpk sine wave, 1kHz, power supply is +-15V for both OPAMP and power stage.
BTW, the ADISimPE provided by ADI is no longer working. It complains outdated version and expired license, but ADI doesn't offer 8.20 download. I can only download 8.10 version, but it doesn't work. It insists me to upgrade to the latest version which is nowhere to be found.
Apologize for the long post.