0.1 GHz to 13.0 GHz,0.5 dB LSB, 6-Bit,
GaAs Digital Attenuator
Data Sheet
HMC424ACHIPS
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Attenuation range: 0.5 dB (LSB) steps to 31.5 dB
0.5 dB typical step error
VEE
HMC424ACHIPS
Low insertion loss: 2.8 dB typical at 4.0 GHz
High linearity at VEE = −5 V
RF1
RF2
Input P0.1dB: 25 dBm typical
Input IP3: 45 dBm typical
High RF input power handling: 25 dBm maximum
Low relative phase: 30° at 6.0 GHz
Single-supply operation: −3 V to −5 V
Die size: 1.390 mm × 0.770 mm × 0.102 mm
V6
V5
V4
V3
V2
V1
APPLICATIONS
Figure 1.
Cellular infrastructure
Microwave radios and very small aperture terminals (VSATs)
Test equipment and sensors
Intermediate frequency (IF) and RF designs
Military and space
GENERAL DESCRIPTION
The HMC424ACHIPS is a broadband, 6-bit, gallium arsenide
(GaAs), digital attenuator monolithic microwave integrated
circuit (MMIC) chip with a 31.5 dB attenuation control range in
0.5 dB steps.
The device allows a user to program the attenuation state via six
parallel control inputs toggled between 0 V and VEE.
The HMC424ACHIPS operates with a single negative supply
voltage from −3 V to −5 V, and requires an external driver to
interface with a CMOS/transistor to transistor logic (TTL)
interface.
The HMC424ACHIPS offers excellent attenuation accuracy of
(0.2 dB + 3% of attenuation state) and high input linearity over
the specified frequency range from 0.1 GHz to 13.0 GHz with a
typical insertion loss of ≤4.2 dB. The attenuator bit values are
0.5 dB (LSB), 1 dB, 2 dB, 4 dB, 8 dB, and 16 dB for a total
attenuation of 31.5 dB with a 0.5 dB of typical step error.
The HMC424ACHIPS comes in a RoHS compliant, 9-pad bare die.
Rev. B
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