AMMC-6650
DC–40 GHz Variable Attenuator
Data Sheet
Description
The AMMC-6650 is a voltage controlled variable attenua-
tor designed to operate from DC-40 GHz. It is fabricated
using Avago Technologies enhancement mode pHEMT
MMIC process with backside ground vias, and gate lengths
of approximately 0.25um. The distributed topology of the
AMMC-6650 facilitates broadband operation by absorbing
parasitic e ects of its series and shunt FETs. An on-chip DC
reference circuit may be used to maintain optimum VSWR
for any attenuation setting or to provide more linear
attenuation versus voltage response.
Simpli ed Schematic
Features
• Wide Frequency Range DC-40 GHz
• Attenuation Range 20dB
• Single Positive Bias Supply
• Unconditionally Stable
Applications
• Microwave Radio Systems
• Satellite VSAT, DBS Up / Down Link
• LMDS & Pt – Pt mmW Long Haul
• Broadband Wireless Access (including 802.16 and
802.20 WiMax)
• WLL and MMDS loops
Attention: Observe precautions for
handling electrostatic sensitive devices.
ESD Machine Model = 80 V
ESD Human Body Model = 400 V
Refer to Avago Application Note A004R:
Electrostatic Discharge, Damage and Control.
Chip Size: 1530 μm x 660 µm (61.2 x 26.4 mils)
Chip Size Tolerance: ±10 µm (±0.4 mils)
Chip Thickness: 100 ± 10 µm (4 ±0.4 mils)
Pad Dimensions: 80 x 120 µm (3.2 x 4.8 mils)
DCin
DCout
V2
V1
RFoutRFin
variable
attenuator
DC
reference circuit