0.6 GHz to 3.0 GHz, 0.5 dB LSB, 6-Bit,
Silicon Digital Step Attenuator
HMC8073
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
HMC8073
Attenuation range: 0.5 dB LSB steps to 31.5 dB
Low insertion loss
1.1 dB to 1.0 GHz
1.5 dB to 2.0 GHz
Tight attenuation accuracy
1
2
3
4
12 LE
VDD
A0
LOGIC
11 GND
10 GND
CONTROL
Less than 0.25 dB (plus 3% of attenuation state)
Low phase shift error: 4° phase shift to 1.0 GHz
Bidirectional use: 30 dBm high power handling
Internal dc block on the RFIN/RFOUT pins
High linearity
GND
RFIN
6-BIT DSA
9
RFOUT
P1dB: 31 dBm typical
Input IP3: 52 dBm typical
Figure 1.
Safe state transitions
Serial interface with TTL/CMOS
Up to 8 devices on a single data bus
Single-supply operation: 3.3 V to 5.0 V
ESD sensitivity rating: Class 1C (1 kV human body model)
16-lead, 3 mm × 3 mm LFCSP package: 9 mm2
APPLICATIONS
Cellular infrastructure
Microwave radios
Very small aperture terminals
Test equipment and sensors
GENERAL DESCRIPTION
The HMC8073 is a 6-bit digital step attenuator (DSA), operating
from 0.6 GHz to 3.0 GHz, that features 31.5 dB of attenuation
range with 0.5 dB steps.
The external address feature of the HMC8073 allows users to
control up to eight DSAs using a single bus. The DSA has an
on-chip regulator that supports a wide supply operating range
from 3.3 V to 5.0 V with no performance change in electrical
characteristics. The HMC8073 incorporates a complementary
metal-oxide semiconductor (CMOS)- and transistor transitory
logic (TTL)- compatible interface that supports serial (3-wire)
control of the attenuator.
The HMC8073 is implemented in a silicon process, offering
a fast settling time, low power consumption, and high
electrostatic discharge (ESD) robustness. The device features
safe state transitions, allowing attenuation state changes without
overshooting, and is optimized for excellent step accuracy and
high power and high linearity over frequency and temperature
range. The radio frequency (RF) input and output are internally
matched to 50 Ω and do not require any external matching
components. The design is bidirectional, and the RF input and
output are interchangeable.
The HMC8073 comes in an RoHS compliant, compact,
3 mm × 3 mm LFCSP package.
Rev. B
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