HMC624LP4E

The HMC624LP4E from Hittite Microwave (now part of Analog Devices) is a versatile 6-bit digital attenuator designed for RF and IF applications. Fabricated using Gallium Arsenide (GaAs) MMIC technology, this component operates across a broad frequency range from DC to 6 GHz.

Key electrical specifications include a maximum insertion loss of 2.4 dB from DC to 3 GHz and 3.8 dB from 3.0 to 6.0 GHz. It provides an attenuation range of 31.5 dB with a least significant bit (LSB) of 0.5 dB. The attenuator boasts a high input power for 0.1 dB compression of 30 dBm and an input third-order intercept point of +55 dBm. Switching speeds are rapid, with typical tRise/tFall times of 100 ns and typical tON/tOFF times of 150 ns.

The HMC624LP4E supports dual-mode control, accepting either a three-wire serial input or a 6-bit parallel word, with CMOS/TTL compatibility. It features a user-selectable power-up state and a serial output port for cascading other Hittite serial-controlled components. The device is housed in a compact, low-cost 4x4 mm QFN leadless SMT package, requiring no external matching components and is suitable for surface mounting.

This digital attenuator is ideal for applications such as cellular infrastructure, WiBro/WiMAX/4G systems, microwave radio, VSAT, test equipment, and general RF/IF applications.