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The Sound Semiconductor ProCircuit™ SSI2161 is a versatile and high performance VCA building block for
a wide variety of audio applications. A single channel provides voltage control of a current-
mode input and output for a gain range from +20dB to –100dB,
with control provided by a ground-referenced –33mV/dB constant.
This device offers considerable flexibility for a wide range of design
goals and applications. A unique mode control allows selection of Class
A, Class AB, or in-between using a single resistor. In addition, improved
current handling allows use of lower value input resistors for reduced
output noise without loss of headroom. Finally, the VCA can be used as
a high-quality OTA building block for a variety of applications such as
voltage controlled filters, exponential generators, and antilog converters.
The SSI2161 will operate on supplies as low as +8V for battery-powered
devices such as guitar pedals, or up to ±18V in systems where
maximum headroom and S/N ratio is desired.
This is one of a family of economical high performance VCAs from
Sound Semiconductor. See the Related Products table below for additional
SSI VCA products.
