KMTech Low Noise INA217 Balanced Microphone Preamplifier Phantom Power PCB v1.01
A very compact (80mm x 40mm) circuit board on which to build a high quality, low noise balanced microphone preamplifier.
We also sell a version of this board that uses the SOIC-150 version of the OPA137. Available in our eBay store now.
- Uses the INA217 low-noise, low-distortion, monolithic instrumentation amplifier. Should also work with THAT1510P, SSM2019, SSM2017, and INA163.
- The INA217 is ideal for low-level audio signals such as balanced low-impedance microphones.
- The INA217 features differential input, low noise, and low distortion that provides superior performance in professional microphone amplifier applications.
- Onboard phantom power connections.
- A well thought-out double-sided, FR-4 fireproof circuit board, designed in the UK with DIYers in mind.
- Power from ±12V DC.
Bill of Materials.
1x Neutrik NC3FAAH2 Female XLR connector.
1x INA217 DIP-8 IC.
1x OPA137 DIP-8 IC.
2x DIP-8 IC sockets (recommended but not essential).
2x 6.8k resistors for R1, R2.
1x 47k resistor for R3.
2x 2k2 resistors for R4, R5.
1x 8R resistor for R6.
1x 1M resistor for R8.
1x 2k 6mm trimmer potentiometer.
4x IN4148 diode.
3x 47uF electrolytic capacitors.
5x 100nF ceramic capacitors.
For more info about this circuit and the schematic see the Burr-Brown/TI INA217 datasheet.
THIS LISTING IS FOR A CIRCUIT BOARD ONLY. NO COMPONENTS ARE INCLUDED.