Sound Semiconductor’s SSI2164, a low noise and distortion VCA with four independent channels, was introduced several years ago. The newly launched SSI2161 internally parallels all four SSI2164 channels, for a 6dB noise improvement, offering the lowest noise among VCA chips.
Likewise, the SSI2162 internally parallels two pairs of SSI2164 channels for 3dB lower noise.
All VCA’s have exponential control with a –33mV/dB gain constant. Current inputs and outputs allow a wide range of input and output resistance to suit design needs, and a unique mode control permits selection of class A, AB, or intermediate biasing of the gain core to optimize noise versus distortion characteristics. A gain range from +20dB to –100dB is possible.
Pricing and Availability
The SSI2161 and SSI2162 are both housed in a 10-lead Shrink Small Outline Package (SSOP). Pricing at 1000 pieces is $0.84 for the SSI2161 and $0.99 for the SSI2162. Both are available now.