Build acoustics PHOD amplifier board

[theochemel]

Goal: Build an amplifier board to allow 4 PHOD-1 hydrophones to interface with a Teensy or Zybo Z7 FPGA ADC.

Inputs:

• Clean 5V supply and 24V supply from acoustics power board (will need to assemble another)
• Dirty 16V supply from battery (if needed)
• Reference 3V3 supply from Teensy
• 3V3 level I2C or logic inputs for variable gain
• 4x PHOD-1s

Outputs:

• 4x 0-3V3 amplified outputs referenced to 1/2 3V3

Functionality:

1. First amplifier stage
2. Filter stage, likely bandpass with 20kHz low cutoff, 60 kHz high cutoff, but may need to be adjusted
3. Second amplifier stage

One amplifier stage should be programmable from the microcontroller, and the other should be easily adjustable with a potentiometer or by swapping resistors.

Resources:
Sparton PHOD-1 Datasheet