General Description
The HMC305LP4 & HMC305LP4E are broadband 5-bit positive control GaAs IC digital attenuators with CMOS compatible serial-to-parallel drivers packaged in leadless QFN 4x4 mm SMT packages. Covering 0.7 to 3.8 GHz, the insertion loss is typically less than 1.5 to 2 dB. The attenuator bit values are 0.5 (LSB), 1, 2, 4, and 8 dB for a total attenuation of 15.5 dB. Attenuation accuracy is excellent at ±0.25 dB typical with an IIP3 of up to +52 dBm. Five bit serial control words are used to select each attenuation state. A single Vcc bias of +3V to +5V applied through an external 5k Ohm resistor is required.

Features
   0.5 dB LSB Steps to 15.5 dB
   CMOS Compatible Serial Data Interface
   SPI Compatible Serial Output
   ±0.3 dB Typical Bit Error
   24 Lead 4x4mm QFN Package: 16mm2
   Included in the HMC-DK004 Designer’s Kit

Typical Applications
The HMC305LP4 / HMC305LP4E is ideal for:
• Cellular/3G Infrastructure
• Fixed Wireless, WiMax & WiBro
• Test Instrumentation