# Electret Microphone Pre-Amplifier ## Description Design a low-noise microphone preamplifier for an electret condenser mic. ## Project Details - **Owner:** ryanf - **Created:** 8/10/2025 - **Last Updated:** 8/11/2025 - **Visibility:** Public - **Copies:** 1 ## Key Components ### — [100nF0603](https://www.flux.ai/charleszard/100nf0603.md) - Tolerance: 10% - Voltage: 50V - Package or Case Code: C_0603_1608Metric - Manufacturer Part Number: CL10B104KB8NNNC - Substitute Manufacturer Part Number: C1591 - Capacitance: 100nF **Pins:** - ~ [pin 1] - ~ [pin 2] ### — [100nF0603](https://www.flux.ai/charleszard/100nf0603.md) - Manufacturer Part Number: CL10B104KB8NNNC - Substitute Manufacturer Part Number: C1591 - Capacitance: 100nF - Tolerance: 10% - Package or Case Code: C_0603_1608Metric - Voltage: 50V **Pins:** - ~ [pin 1] - ~ [pin 2] ### — [100nF0603](https://www.flux.ai/charleszard/100nf0603.md) - Tolerance: 10% - Voltage: 50V - Package or Case Code: C_0603_1608Metric - Manufacturer Part Number: CL10B104KB8NNNC - Substitute Manufacturer Part Number: C1591 - Capacitance: 100nF **Pins:** - ~ [pin 1] - ~ [pin 2] ### MK1 — [POM-3535P-3-R](https://www.flux.ai/adrian95/pom-3535p-3-r.md) - Manufacturer Part Number: POM-3535P-3-R - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: PUI Audio, Inc. - Part Type: Microphone - Datasheet URL: https://www.mouser.com/datasheet/2/334/POM-3535P-3-R-270441.pdf **Pins:** - 1 [pin N] - 2 [pin P] ### U1 — [OPA188AIDBVR](https://www.flux.ai/jecstronic/opa188aidbvr.md) - Part Type: Operational Amplifier (OP-AMP) - Manufacturer Part Number: OPA188AIDBVR - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fopa188 - Manufacturer Name: Texas Instruments **Pins:** - - [pin 4] - + [pin 3] - OUTPUT [pin 1] - V- [pin 2] - V+ [pin 5] ### U2 — [TLV320ADC5140IRTWR](https://www.flux.ai/collinsemasi/tlv320adc5140irtwr.md) - Data Interface: I2C, SPI - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments - Datasheet URL: https://www.ti.com/lit/ds/symlink/tlv320adc5140.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: TLV320ADC5140IRTWR - Symbol Style: Parametric - Operating Voltage: 1.7V ~ 3.6V, 1.65V ~ 3.6V - Fs: 768kHz - Operating Temperature: -40°C ~ 125°C (TA) **Pins:** - ADDR0_SCLK [pin 16] - ADDR1_MISO [pin 15] - AREG [pin 2] - AVDD [pin 1] - AVSS [pin 4] - BCLK [pin 22] - DREG [pin 24] - FSYNC [pin 23] - GPIO1 [pin 20] - IN1M_GPO1 [pin 7] - IN1P_GPI1 [pin 6] - IN2M_GPO2 [pin 9] - IN2P_GPI2 [pin 8] - IN3M_GPO3 [pin 11] - IN3P_GPI3 [pin 10] - IN4M_GPO4 [pin 13] - IN4P_GPI4 [pin 12] - IOVDD [pin 19] - MICBIAS [pin 5] - SCL_MOSI [pin 17] - SDA_SSZ [pin 18] - SDOUT [pin 21] - SHDNZ [pin 14] - VREF [pin 3] - VSS [pin 25] ### U3 — [TS3A24159DGSR](https://www.flux.ai/jecstronic/ts3a24159dgsr.md) - Part Type: Analog Switch - Manufacturer Part Number: TS3A24159DGSR - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=http%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Fts3a24159 - Manufacturer Name: Texas Instruments **Pins:** - COM1 [pin 3] - COM2 [pin 9] - GND [pin 6] - IN1 [pin 4] - IN2 [pin 8] - NC1 [pin 5] - NC2 [pin 7] - NO1 [pin 2] - NO2 [pin 10] - VCC [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ryanf/electret-microphone-pre-amplifier](https://www.flux.ai/ryanf/electret-microphone-pre-amplifier).* --- *Generated from [https://www.flux.ai/ryanf/electret-microphone-pre-amplifier](https://www.flux.ai/ryanf/electret-microphone-pre-amplifier)*