HMC985 / HMC985LP4KE Voltage Variable Attenuator or GaAs, MMIC, Voltage Variable Attenuator SMT, 10 GHz to 40 GHz or 20 GHz to 50 GHz

The HMC985 devices are absorptive, voltage variable attenuators (VVAs) which operate from 10 GHz to 40 GHz or 20 GHz to 50 GHz and are ideal in designs when an analog dc control signal must be used to control RF signal levels over a 35 dB dynamic range. They feature two shunt-type attenuators which are controlled by two analog voltages, VCTRL1 and VCTRL2. Optimum linearity performance of the attenuators is achieved by first varying VCTRL1 of the first attenuation stage from −3 V to 0 V with VCTRL2 fixed at −3 V. The control voltage of the second attenuation stage, VCTRL2, should then be varied from −3 V to 0 V with VCTRL1 fixed at 0 V. However, if the VCTRL1 and VCTRL2 pins are connected together, it is possible to achieve the full analog attenuation range with only a small degradation in input IP3 performance. Applications include AGC circuits and temperature compensation of multiple gain stages in microwave, point-to-point, and VSAT radios.

Applications

Point-to-point radios
VSAT radio
Test instrumentation
Microwave sensors
Military, ECM, and radar

Features and Benefits

Wide bandwidth: 10 GHz to 40 GHz or 20 GHz to 50 GHz
Excellent linearity: +32 dB input IP3
Wide attenuation range: 35 dB

No external matching
Die size: 2.78 × 1.37 × 0.1 mm
4 × 4 mm, leadless, surface-mount technology (SMT) package

RF & Microwave

Voltage Variable Attenuators

S-Parameters

HMC985 S-Parameters .ZIP

Data Sheets

Document	note
HMC985LP4KE Data Sheet	PDF 1.01 M
HMC985 Die Data Sheet	PDF 801.39 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
HMC985 Last Time Buy	CHIPS OR DIE	OTH 25	-40 to 85C	57.53	46.6	Y
HMC985LP4KE Last Time Buy	HCP-16 ld QFN (3x3mm w/1.725mm ep)	OTH 50	-40 to 85C	24.35	19.72	Y
HMC985LP4KETR Last Time Buy	HCP-16 ld QFN (3x3mm w/1.725mm ep)	REEL 500	-40 to 85C	24.35	19.72	Y