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For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
HMC624LP4 / 624LP4E
0.5 dB LSB GaAs MMIC 6-BIT
DIGITAL ATTENUATOR, DC - 6 GHz
v12.0812
Functional Diagram
Electrical Specifications,
T
A
= +25?C, 50 Ohm System, with Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted)
The HMC624LP4(E) is a broadband 6-bit GaAs IC
Digital Attenuator in a low cost leadless SMT package.
This versatile digital attenuator incorporates off-chip
AC ground capacitors for near DC operation, making
it suitable for a wide variety of RF and IF applications.
The   dual   mode   control   interface   is   CMOS/TTL
compatible, and accepts either a three wire serial
input or a 6 bit parallel word. The HMC624LP4(E) also
features a user selectable power up state and a serial
output port for cascading other Hittite serial controlled
components. The HMC624LP4(E) is housed in a
RoHS compliant 4x4 mm QFN leadless package, and
requires no external matching components.
Parameter
Frequency (GHz)
Min.
Typ.
Max.
Units
Insertion Loss
DC - 3 GHz
3.0 - 6.0 GHz
1.8
2.8
2.4
3.8
dB
dB
Attenuation Range
31.5
dB
Return Loss (ATTIN, ATTOUT, All Atten. States)
DC - 6 GHz
15
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
All Attenuation States
DC - 0.8 GHz
0.8 - 6.0 GHz
?(0.10 + 5% of Atten. Setting) Max.
?(0.30 + 3% of Atten. Setting) Max.
dB
dB
Input Power for 0.1 dB Compression
DC - 6 GHz
30
dBm
Input Third Order Intercept Point
(Two-Tone Input Power = 10 dBm Each Tone)
DC - 6 GHz
55
dBm
Switching Speed
tRise, tFall (10 / 90% RF)
rON , tOFF (50% LE to 10 / 90% RF)
DC - 6 GHz
100
150
ns
ns
Typical Applications
Features
General Description
The HMC624LP4(E) is ideal for:
" Cellular/3G Infrastructure
" WiBro / WiMAX / 4G
" Microwave Radio & VSAT
" Test Equipment and Sensors
" IF & RF Applications
0.5 dB LSB Steps to 31.5 dB
Power-Up State Selection
High Input IP3: +55 dBm
Low Insertion Loss: 2.2 dB @ 3.5 GHz
TTL/CMOS Compatible, Serial, Parallel
or Latched Parallel Control
?.25 dB Typical Step Error
Single +3V or +5V Supply
24 Lead 4x4mm SMT Package: 16mm
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