hi,
I have a DIY amp project going on and have a couple of square cm left on a PCB (not the amp pcb). I thought it could be neat to use that extra space to add a simple ADC to measure mainly amplifier frequency response and maybe some other random measurements without risking my good ADC. I don't need much accuracy, just something that if i break i wont cry. the idea is to interface it to a raspberry pi via i2s or use the spdif output. I have used before a cheap interface (M-track solo) but its frequency response is not flat 20-20k to start with... and there are not many other options with differential inputs below 50 euros that i know of.
I have been looking around and came across of ESS ES9826Q, that seems to check all the boxes. It is very cheap, it has a hardware mode with very little components (not even op-amps are necessary), input impedance is selectable 2.5-10 kOhm (seems low? i have seen there is a debate on the subject but it is above my paygrade, i only want to measure frequency response, not high performance DACs).
But i have found next to no information online besides the datasheet, maybe the chip is too new.
In any case, before moving forward. Am i missing something? is there a "to go" adc for these sort of projects? my requirements are:
- Hardware mode
- differential inputs
- very cheap and low component count and cost
- i2s and/or spdif outputs, preferably both
thanks!
I have a DIY amp project going on and have a couple of square cm left on a PCB (not the amp pcb). I thought it could be neat to use that extra space to add a simple ADC to measure mainly amplifier frequency response and maybe some other random measurements without risking my good ADC. I don't need much accuracy, just something that if i break i wont cry. the idea is to interface it to a raspberry pi via i2s or use the spdif output. I have used before a cheap interface (M-track solo) but its frequency response is not flat 20-20k to start with... and there are not many other options with differential inputs below 50 euros that i know of.
I have been looking around and came across of ESS ES9826Q, that seems to check all the boxes. It is very cheap, it has a hardware mode with very little components (not even op-amps are necessary), input impedance is selectable 2.5-10 kOhm (seems low? i have seen there is a debate on the subject but it is above my paygrade, i only want to measure frequency response, not high performance DACs).
But i have found next to no information online besides the datasheet, maybe the chip is too new.
In any case, before moving forward. Am i missing something? is there a "to go" adc for these sort of projects? my requirements are:
- Hardware mode
- differential inputs
- very cheap and low component count and cost
- i2s and/or spdif outputs, preferably both
thanks!
