HMC346 / HMC346C8 / HMC346G8 / HMC346LC3B / HMC346LP3 / HMC346MS8G Voltage Variable Attenuator Chip, SMT, or Hermetic SMT, DC to 8 GHz, 14 GHz, 18 GHz, or 20 GHz

The HMC346 devices are absorptive, voltage variable attenuators (VVAs) operating from dc to 8 GHz, 14 GHz, 18 GHz, or 20 GHz. They feature on-chip reference attenuators for use with an external op-amp to provide simple single voltage attenuation control, 0 V to −3 V. These devices are ideal in designs when an analog dc control signal must control RF signal levels over a 30 dB amplitude range. Applications include AGC circuits and temperature compensation of multiple gain stages in microwave radios and test instrumentation.

Applications

Point-to-point radios
VSAT radio
Base station infrastructure
Fiber optics and broadband telecom
Microwave radio and VSAT
Military radios, radar, and ECM
Test instrumentation

Features and Benefits

Wide bandwidth: dc to 8 GHz, 14 GHz, 18 GHz, or 20 GHz
Low phase shift vs. attenuation
30 dB or 32 dB attenuation range
Simplified voltage control
Die size: 0.85 × 0.85 × 0.1 mm
RoHS compliant, 3 × 3 mm, surface-mount technology (SMT) package

3 × 3 × 1 mm, surface-mount technology (SMT) package
Surface-mount, ceramic package
8-lead, hermetic, surface-mount technology (SMT) package

RF & Microwave

Voltage Variable Attenuators

HMC346 S-Parameter

Data Sheets

Document	note
HMC346C8 Data Sheet	PDF 605 K
HMC346G8 Data Sheet	PDF 575.27 K
HMC346LC3B Data Sheet	PDF 655.2 K
HMC346LP3 Data Sheet	PDF 604.22 K
HMC346MS8G Data Sheet	PDF 589.22 K
HMC346 Die Data Sheet	PDF 638.52 K

Application Notes

Document	note
Designing with the HMC346ms8g Voltage Variable Attenuator Application Note	PDF 532.7 K

Order Information

Part Number	Package	Packing Qty	RoHS
HMC346 Last Time Buy	CHIPS OR DIE	OTH 50	Y
HMC346C8 Last Time Buy	8 ld SMT (4.32x5.59)	OTH 50	Y
HMC346C8TR Last Time Buy	8 ld SMT (4.32x5.59)	REEL 100	Y
HMC346G8 Last Time Buy	CERPAK(HERM CER SRF MOUNT)	OTH 50	Y
HMC346G8TR Last Time Buy	CERPAK(HERM CER SRF MOUNT)	REEL 100	Y
HMC346LC3B Last Time Buy	12 ld LCC (3x3mm w/1.5mm EP)	OTH 50	Y
HMC346LC3BTR Last Time Buy	12 ld LCC (3x3mm w/1.5mm EP)	REEL 100	Y
HMC346LC3BTR-R5 Last Time Buy	12 ld LCC (3x3mm w/1.5mm EP)	REEL 500	Y
HMC346LP3 Last Time Buy	16 ld QFN (3x3mm w/1.7mm ep)	OTH 50	N
HMC346LP3E Last Time Buy	16 ld QFN (3x3mm w/1.7mm ep)	OTH 50	Y
HMC346LP3ETR Last Time Buy	16 ld QFN (3x3mm w/1.7mm ep)	REEL 500	Y
HMC346LP3TR Last Time Buy	16 ld QFN (3x3mm w/1.7mm ep)	REEL 500	N
HMC346MS8G Last Time Buy	8 ld MSOP_EP	OTH 50	N
HMC346MS8GE Last Time Buy	8 ld MSOP_EP	OTH 50	Y
HMC346MS8GETR Last Time Buy	8 ld MSOP_EP	REEL 500	Y
HMC346MS8GTR Last Time Buy	8 ld MSOP_EP	REEL 500	N

Evaluation Boards

Part Number	Description	Price	RoHS
104091-HMC346MS8G	Evaluation Board - HMC346MS8G Evaluation PCB	-1	Y
104095-HMC346G8	Evaluation Board - HMC346G8 Evaluation PCB	-1	Y
105709-HMC346LP3	Evaluation Board - HMC346LP3 Evaluation PCB	-1	Y
109023-HMC346C8	Evaluation Board - HMC346C8 Evaluation PCB	-1	Y
109741-HMC346LC3B	Evaluation Board - HMC346LC3B Evaluation PCB	-1	Y