v00.0604
HMC472LP4
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz
Typical Applications
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
9
ATTENUATORS - SMT
The HMC472LP4 is ideal for both RF
and IF applications:
• Cellular; UMTS/3G Infrastructure
• ISM, MMDS, WLAN, WiMAX
• Microwave Radio & VSAT
• Test Equipment & Sensors
Functional Diagram
General Description
The HMC472LP4 is a broadband 6-bit GaAs IC
digital attenuator in a low cost leadless surface
mount 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.
Electrical Specifi cations,
T
A
= +25° C, With Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted)
Parameter
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy:
(Referenced to Insertion Loss)
Input Power for 0.1 dB Compression
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
Switching Characteristics
DC - 3.0 GHz
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
130
140
ns
ns
REF - 15.5 dB States
16.0 - 31.5 dB States
REF - 15.5 dB
16.0 - 31.5 dB
Frequency (GHz)
DC - 1.5 GHz
1.5 - 3.0 GHz
DC - 3.0 GHz
DC - 3.0 GHz
DC - 3.0 GHz
0.1 - 3.0 GHz
0.1 - 3.0 GHz
Min.
Typ.
1.5
2.0
31.5
15
± (0.4 + 4% of Atten. Setting) Max.
± (0.5 + 4% of Atten. Setting) Max.
20
45
35
Max.
1.8
2.3
Units
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
9 - 144
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HITTITE [ HITTITE MICROWAVE CORPORATION ]
