HMC1122LP4METR

The HMC1122LP4METR is a 6-bit silicon digital attenuator designed for RF applications, operating across a wide frequency range of 0.1 GHz to 6.0 GHz. It offers a total attenuation control range of 31.5 dB, with precise 0.5 dB LSB steps. This attenuator boasts low insertion loss, with typical values of 1.1 dB at 1 GHz and 1.3 dB at 2 GHz, ensuring minimal signal degradation.

Key electrical characteristics include a typical input 0.1dB compression point (P0.1dB) of 30 dBm and a third-order intercept point (IP3) of 55 dBm, indicating good linearity. The RF settling time is a fast 250 ns for a 0.05 dB output change, and phase shift error is minimal at 6° at 1 GHz. The device operates on a single supply voltage ranging from 3.3 V to 5 V and features internally matched 50 Ohm RF input and output, eliminating the need for external matching components.

Packaged in a compact 4 mm × 4 mm, 24-lead LFCSP (QFN) package with an exposed pad, the HMC1122LP4METR is suitable for surface-mount designs. Its bidirectional design allows for interchangeable RF input and output ports. The attenuator supports both serial and parallel interface control and is pin-compatible with the HMC624A, making it a versatile choice for cellular infrastructure, microwave radios, VSATs, test equipment, sensors, and IF/RF designs.