Evaluating the SSM2167 Low Voltage Microphone Preamplifier with Variable Compression and Noise Gating
Evaluation guide for the SSM2167 microphone preamplifier, featuring variable compression, noise gating, schematics, and BOM for low-voltage audio system testing.
Overview
This application note provides detailed instructions for the setup and operation of the SSM2167 evaluation board. It covers the evaluation of the SSM2167 low-voltage microphone preamplifier, which includes integrated features for variable compression and noise gating. The document describes power and ground connections optimized for 3V operation, shutdown pin configuration, and input/output signal paths for both electret and dynamic microphones. It provides guidance on setting the noise gate threshold and adjusting compression ratios through jumper settings. The guide is supported by a complete circuit schematic, PCB layout diagrams for top and bottom layers, and a comprehensive bill of materials.
Use Cases
- Evaluating SSM2167 performance in audio systems
- Prototyping microphone signal conditioning circuits
- Improving vocal clarity in low-voltage communication devices
- Designing noise-gated audio input stages
Topics
Referenced Parts
TP-104-01-00
Components Corporation
GND Test point TP-104-01-00
TP-104-01-02
Components Corporation
+3V Test point TP-104-01-02
TP104-01-06
Components Corporation
SD Test point TP104-01-06
TP104-01-08
Components Corporation
INPUT, OUTPUT Test point TP104-01-08
MC0805S8F3001T5E
Multicomp
R13 Resistor chip, 0805 MC0805S8F3001T5E
GRM21BR71A106ME51
Murata
C5 to C8 Capacitors, ceramic, X7R GRM21BR71A106ME51
| TAJA106K010RNJ | AVX | C2, C3, C9 Tantalum capacitors TAJA106K010RNJ |
| SSM2167-1RMZ | Analog Devices | U1 Low voltage microphone pre-amp SSM2167-1RMZ |
| SJ1-3525NG | CUI Devices | J1, J2 3.5 mm stereo jacks SJ1-3525NG |
| GRM2165C1H102JA01D | Murata | C11 Capacitor, ceramic, C0G GRM2165C1H102JA01D |
| GRM21BR71H104KA01L | Murata | C1, C10 Chip capacitors, X7R, 0805 GRM21BR71H104KA01L |
| GRM31CR61E106KA12L | Murata | C4 Capacitor, ceramic monolithic, X5R GRM31CR61E106KA12L |
| ERJ-6ENF1001V | Panasonic | R15 Resistor, precision thick film chip, R0805 ERJ-6ENF1001V |
| ERJ-6ENF1002V | Panasonic | R8 Resistor, precision thick film chip, R0805 ERJ-6ENF1002V |
| ERJ-6ENF1003V | Panasonic | R7 Resistor, precision thick film chip, R0805 ERJ-6ENF1003V |
| ERJ-6ENF1743V | Panasonic | R9 Resistor, precision thick film chip ERJ-6ENF1743V |
| ERJ-6ENF2001V | Panasonic | R14 Resistor, precision thick film chip, R0805 ERJ-6ENF2001V |
| ERJ-6ENF7502V | Panasonic | R10 Resistor, precision thick film chip, R0805 ERJ-6ENF7502V |
| ERJ-6GEY0R00V | Panasonic | R12, R16 Resistors, thick film chip ERJ-6GEY0R00V |
| SNT-100-BK-G | Samtec | JP4, JP5 Shunt connector SNT-100-BK-G |
| SSW-102-01-G-S | Samtec | JP1, JP2 Headers SSW-102-01-G-S |
| PHT0805Y5003BGT200 | Vishay | R5 Resistor, high precision thick film chip PHT0805Y5003BGT200 |
| 10-89-7102 | Molex | JP4, JP5 Headers 10-89-7102 |
| TP-104-01-00 | Components Corporation | GND Test point TP-104-01-00 |
| TP-104-01-02 | Components Corporation | +3V Test point TP-104-01-02 |
| TP104-01-06 | Components Corporation | SD Test point TP104-01-06 |
| TP104-01-08 | Components Corporation | INPUT, OUTPUT Test point TP104-01-08 |
| MC0805S8F3001T5E | Multicomp | R13 Resistor chip, 0805 MC0805S8F3001T5E |
| GRM21BR71A106ME51 | Murata | C5 to C8 Capacitors, ceramic, X7R GRM21BR71A106ME51 |