Analog Devices Inc. HMC624ALP4E Digital Attenuator

Analog Devices Inc. HMC624ALP4E Digital Attenuator is a broadband 6-bit GaAs IC in a low cost leadless SMT package. This versatile digital attenuator incorporates off-chip AC ground capacitors for near DC operation, making it suitable for a wide variety of RF and IF applications. The dual mode control interface is CMOS/TTL compatible, and accepts either a three wire serial input or a 6 bit parallel word. The HMC624ALP4E also features a user selectable power up state and a serial output port for cascading other Hittite serial controlled components. The HMC624ALP4E is housed in a RoHS compliant 4x4mm QFN leadless package, and requires no external matching components.


  • 0.5dB LSB steps to 31.5dB
  • Power-up state selection
  • +55dBm gh Input IP3
  • TTL/CMOS Compatible, serial, parallel or latched parallel control
  • 2.2dB@3.5GHz Low insertion loss
  • ±0.25dB Typical step error
  • Single +3V or +5V supply
  • 16mm2 24 Lead 4x4mm SMT package


  • 28dBm (T=+85°C) RF input power (DC - 6GHz)
  • -1 to Vdd +1V digital inputs
  • 5.6V Bias voltage (Vdd)
  • 150°C Channel temperature
  • 0.56W Continuous Pdiss
  • 116°C/W Thermal resistance
  • -40 to +85°C Operating temperature
  • Class 1A ESD Sensitivity (HBM)


  • Cellular/3G infrastructure
  • WiBro / WiMAX / 4G
  • Microwave radio & VSAT
  • Test equipment and sensors
  • IF & RF applications
Publicado: 2014-12-23 | Actualizado: 2022-03-11