ADI’s ADGS1408 and ADGS1409 are analog multiplexers comprising eight single channels and four differential channels, respectively. A serial peripheral interface (SPI) controls the switches. The SPI has robust error detection features such as cyclic redundancy check (CRC) error detection, invalid read/write address detection, and SCLK count error detection.

It is possible to daisy-chain multiple ADGS1408 and ADGS1409 devices together. Daisy-chain mode enables the configuration of multiple devices with a minimal amount of digital lines. These devices can also operate in burst mode to decrease the time between SPI commands. iCMOS construction ensures ultra-low power dissipation, making the devices ideally suited for portable and battery-powered instruments. Each switch conducts equally well in both directions when on, and each switch has an input signal range that extends to the supplies. In the off condition, signal levels up to the supplies are blocked. The on-resistance profile is flat over the full analog input range, which ensures linearity and low distortion when switching audio signals. The ADGS1408 and ADGS1409 come in a 24-pin LFCSP package and were designed for data acquisition, communication systems, and automated test equipment.