The Hittite HMC274QS16 is a 5‑bit GaAs digital attenuator covering 0.7‑2.7 GHz with 1 dB steps and up to 31 dB attenuation.
The HMC274QS16 is a broadband 5‑bit positive‑control GaAs IC digital attenuator in a 16‑lead QSOP plastic package. It operates from 0.7 GHz to 2.7 GHz, providing up to 31 dB of attenuation in 1 dB LSB steps. The device uses a single positive control voltage of +3 V to +5 V and requires a 5 kΩ bias resistor.
Key specifications include typical insertion loss under 2.3 dB, return loss of 10‑15 dB, attenuation accuracy of ±0.35 dB (+5 % of setting), and an input‑power compression point of 20 dBm. The part is rated for storage temperatures from –65 °C to +150 °C and operating temperatures from –40 °C to +85 °C, making it suitable for cellular, ISM, and wireless data applications.
| Frequency range | 0.7 – 2.7 GHz |
|---|---|
| Attenuation range | 31 dB |
| Insertion loss (typical) | < 2.3 dB |
| Return loss (all states) | 10‑15 dB |
| Attenuation accuracy | ±0.35 dB + 5 % of setting |
| Control voltage | +3 V to +5 V |
| Operating temperature | -40 °C to +85 °C |
| Storage temperature | -65 °C to +150 °C |
It operates from 0.7 GHz up to 2.7 GHz.
The device provides 5‑bit control with 1 dB LSB steps, giving a total attenuation of 31 dB.
A single positive control voltage of +3 V to +5 V is required.
Typical insertion loss is less than 2.3 dB.