Item #: DEV-19447
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Price: $37.88 inc GST
    The product is in stock Availability: Discontinued
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    The MIC 3 Click is a Click board™ that features the SSM2167-1RMZ-R7, a Microphone Preamplifier, from Analog Device. This Click board™ is a low voltage Microphone preamplifier with Variable compression and noise gating. The MIC 3 Click is a very easy solution to work with it, which makes it an ideal solution for using it in desktop, portable or palmtop computers, telephone conferencing, communication headsets, two-way communication, surveillance system where the microphone is needed, stethoscope, karaoke and DJ mixers.

    The MIC 3 Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.

    The MIC 3 Click based on the SSM2167-1RMZ-R7 from Analog Devices is a complete and flexible solution for conditioning microphone inputs in personal electronics and computer audio systems. The Click board™ is also excellent for improving vocal clarity in communications and public address systems. A low noise voltage-controlled amplifier (VCA) provides a gain that is dynamically adjusted by a control loop to maintain a set compression characteristic. The MIC 3 Click provides two operation settings, these settings are selectable with NOISE G. COMPR. jumpers.

    The MIC 3 Click provides four different preset values of the noise gate threshold. Experiment with these values by varying the gate. The noise gate threshold is a programmable point using an external resistor. The downward expansion threshold may be set between −40 dBV and −55 dBV, as shown in Table.

    Noise Gate (dBV):

    • -40
    • -48
    • -54
    • -55

    Value of RGATE:

    • 0 Ω
    • 1 Ω
    • 2 Ω
    • 3 Ω

    The Click board™ provides four different preset values of the compression ratio. Changing the scaling of the control signal fed to the VCA causes a change in the circuit compression ratio.Lowering RCOMP gives smaller compression ratios as indicated in Table. Automatic Gain Control (AGC) performance is achieved with compression ratios between 2:1 and 10:1, and is dependent on the application. Shorting RCOMP disables the AGC function, setting the compression equal to 1:1.

    Compression Ratio:

    • 1:1
    • 2:1
    • 5:1
    • 10:1

    Value of RCOMP:

    • 0 Ω
    • 15 Ω
    • 75 Ω
    • 174 Ω

    The MIC 3 Click is designed to work with either 3.3V or 5V power supply. It communicates with the target MCU over GPIO pin on the mikroBUS™. The supply current of the SSM2167 can be reduced to under 10 μA by applying an active low.


    • Interface: GPIO
    • Compatibility: mikroBUS™
    • Dimensions: 57.15 x 25.4mm
    • Input Voltage: 3.3V or 5V