The HMC121C8 is a non-hermetic surface-mount RF voltage variable attenuator suitable for the DC - 10 GHz frequency range. It features wide bandwidth, low phase shift, and simplified voltage control. The device is ideal for designs where an analog DC control signal is used to control RF signal levels within a 25 dB amplitude range.
The HMC121C8 is an absorptive voltage-variable attenuator (VVA) designed for surface-mount applications. It operates from DC to 10 GHz and features an on-chip reference attenuator that simplifies control to a single external voltage ranging from 0 to -3V. This device is ideal for designs requiring analog DC control of RF signal levels over a 25 dB amplitude range.
| Frequency Range | DC - 10 GHz |
|---|---|
| Attenuation Range | 25 dB |
| Insertion Loss (DC - 6 GHz) | 2.0 to 2.5 dB |
| Return Loss (DC - 8 GHz) | 11 to 15 dB |
| Operating Temperature | -55 to +85 deg C |
| Switching Time (tRISE, tFALL) | 3 ns |
The device features an on-chip reference attenuator for use with an external op-amp to provide simple single voltage attenuation control from 0 to -3V.
No, the HMC121C8 is an SMT version; the document refers to the HMC121G8 as the hermetic SMT version.