7 Digital Step Attenuator

In this example, a digital step attenuator is used to control the amount of RF power being delivered to the amplifier. This could be used in a real-world circuit, or a microprocessor could be used to control the output of an RF chipset. The Skyworks SKY12325-350LF is a 3-bit, 7 dB digital step attenuator. When all 3 bits are at logic low, the attenuator is at maximum attenuation. At logic high, the attenuator is at minimum attenuation.