The Analog Devices AD630ADZ is a versatile Modulator/Demodulator IC. It operates within a frequency range of 0Hz to 2MHz and requires a supply voltage between 4.5V and 6.8V.
The Analog Devices AD630SD/883B is a general-purpose modulator/demodulator IC operating from 0Hz to 2MHz. It is designed for through-hole mounting in a 20-CDIP package.