Hi everyone,
We're usintg the TPA3125D2 in a DSP-based project. I was wondering if anyone know what's the input resistance of the ShutDown pin (2)?
The Shutdown of the amps will be controlled by the DSP and its maximum output voltage is 3,3V. We are implementing an RC filter to make the amplifier starts-up after all other circuitry to avoid noises and 'pops', but the minimum high-level input voltage of that pin is 2V (so close to our 3,3V), so depending of the input resistance of the SD pin, the voltage wouldn't be enough to reach the threshold of 2V,
Using the High-level input current (125uA) and the 2V threshold, the resultant resistance is 16k, but we need to be sure.
Thank you very much.
Marti
