HMC472LP4

Features:

• 0.5 dB LSB Steps to 31.5 dB
• Single Control Line Per Bit
• TTL/CMOS Compatible Control
• +/- 0.5 dB Typical Step Error
• Single +5V Supply
• 4 mm x 4 mm x 1 mm SMT Package


Application

The HMC472LP4 is ideal for both RF
and IF applications:
• Cellular; UMTS/3G Infrastructure
• ISM, MMDS, WLAN, WiMAX
• Microwave Radio & VSAT
• Test Equipment & Sensors


Specifications

RF Input Power (DC - 3.0 GHz)	+27 dBm (T = +85 )
Control Voltage Range (V1 to V6)	-1V to Vdd +1V
Bias Voltage (Vdd)	+7.0 Vdc
Channel Temperature	150 °C
Continuous Pdiss (T = 85 ) (derate 7.7 mW/°C above 85 )	0.5 W
Thermal Resistance	130 /W
Storage Temperature	-65 to +150
Operating Temperature	-40 to +85

Description

The HMC472LP4 is a broadband 6-bit GaAs IC digital attenuator in a low cost leadless surfacemount package. This single positive control line per bit digital attenuator incorporates off chip AC ground capacitors for near DC operation, making it suitable for a wide variety of RF and IF applications. Covering DC to 3.0 GHz, the insertion loss is less than 2.0 dB typical. The attenuator bit values are 0.5 (LSB), 1, 2, 4, 8, and 16 dB for a total attenuation of 31.5 dB. Attenuation accuracy is excellent at ± 0.5 dB typical step error with an IIP3 of +45 dBm. Six TTL/CMOS control inputs are used to select each attenuation state. A single Vdd bias of +5V is required in HMC472LP4.