PeterTheRed
Newbie level 1
Greetings!
Newbie here, with what may be a newbie question. I'm working on an AES Digital Audio receiver circuit, and am a bit stumped by the voltage levels at play. The AES/EBU specification says that output signals may range in amplitude from 2 - 7v peak-to-peak, across a 110-ohm termination resistor. However, the receiver ICs that I see from Cirrus or AKM all have a maximum input voltage of ~5V. It would seem that directly connecting my transformer's output to the IC's input could violate it's max input spec. I initially thought of a pair of clamping diodes to GND and the 5V rail, but I'm concerned about the capacitance and non-linear load they will present. A brief look at voltage level translators turns up plenty designed to interface between 5V and 3V3 logic levels, but I don't see (m)any that can accept >5V inputs.
How would you go about pre-conditioning an AES digital audio signal to ensure it doesn't violate the receiver's input voltage range, without degrading the signal in the process?
(it's more of a hardware question than a DSP question, but of the various sub-forums, this seemed most appropriate...)
Thanks and regards,
PWK
Newbie here, with what may be a newbie question. I'm working on an AES Digital Audio receiver circuit, and am a bit stumped by the voltage levels at play. The AES/EBU specification says that output signals may range in amplitude from 2 - 7v peak-to-peak, across a 110-ohm termination resistor. However, the receiver ICs that I see from Cirrus or AKM all have a maximum input voltage of ~5V. It would seem that directly connecting my transformer's output to the IC's input could violate it's max input spec. I initially thought of a pair of clamping diodes to GND and the 5V rail, but I'm concerned about the capacitance and non-linear load they will present. A brief look at voltage level translators turns up plenty designed to interface between 5V and 3V3 logic levels, but I don't see (m)any that can accept >5V inputs.
How would you go about pre-conditioning an AES digital audio signal to ensure it doesn't violate the receiver's input voltage range, without degrading the signal in the process?
(it's more of a hardware question than a DSP question, but of the various sub-forums, this seemed most appropriate...)
Thanks and regards,
PWK