harp.device.sniff-detector

Analog Front-End for an implanted 22KOhm thermistor.

Features:

• 1Hz highpass filter
• 1KHz lowpass filter
• Vout = 1.65 + 100*Vin
• Common mode thermistor input filtering
• Common mode supply voltage filtering

Wiring Diagram

TODO

Additional Parts

These parts aren't part of the PCBA, but they are required for a complete sensing solution:

• 22kOhm thermsistor PN: GAG22K7MCD419 digikey link
• Flexible 2-conductor 36AWG Shielded TAU cable PN: TAU-3607.02 link
• 2-Pin Molex Connector Plug PN: 0533984002 (link)
• 2-Pin Molex Connector Socket PN: 0151340206 (link)

Old Connectors

These connectors are no longer used:

• 2-pin Mill Max Connector pins PN: 850-10-002-20-001000 digikey link
• 2-socket Mill Max Connector socket PN: 801-47-002-10-012000 digikey link