HMC539LP3
/
539LP3E
0.25 dB LSB GaAs MMIC 5-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 4.0 GHz
v00.0605
Typical Applications
Features
0.25 dB LSB Steps to 7.75 dB
+/- 0.05 dB Typical Step Error
Low Insertion Loss: 0.7 dB
High IP3: +50 dBm
Single Control Line Per Bit
TTL/CMOS Compatible Control
Single +5V Supply
6
ATTENUATORS - SMT
The HMC539LP3 / HMC539LP3E is ideal for both RF
and IF applications:
• Cellular Infrastructure
• ISM, MMDS, WLAN, WiMAX, WiBro
• Microwave Radio & VSAT
• Test Equipment and Sensors
Functional Diagram
3x3 mm SMT Package
General Discription
The HMC539LP3 & HMC539LP3E are broadband
5-bit GaAs IC digital attenuators in low cost lead-
less surface mount packages. This single positive
control line per bit digital attenuator utilizes an off
chip AC ground capacitor for near DC operation,
making it suitable for a wide variety of RF and IF
applications. Covering DC to 4.0 GHz, the insertion
loss is less than 0.7 dB typical. The attenuator bit
values are 0.25 (LSB), 0.5, 1, 2, and 4 dB for a total
attenuation of 7.75 dB. Attenuation accuracy is excel-
lent at ± 0.05 dB typical step error. The attenuator also
features a high IIP3 of +50 dBm. Five TTL/CMOS
control inputs are used to select each attenuation
state. A single Vdd bias of +5V is required.
Electrical Specifications,
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 - 4.0 GHz
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
48
52
ns
ns
All States
Frequency (GHz)
DC - 1.5 GHz
1.5 - 3.0 GHz
3.0 - 4.0 GHz
DC - 4.0 GHz
DC - 3.0 GHz
3.0 - 4.0 GHz
DC - 3.0 GHz
3.0 - 4.0 GHz
0.1 - 4.0 GHz
0.1 - 4.0 GHz
Min.
Typ.
0.7
1.0
1.3
7.75
25
20
± (0.2 + 2% of Atten. Setting) Max.
± (0.2 + 4% of Atten. Setting) Max.
28
50
Max.
1.0
1.3
1.7
Units
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
6 - 164
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 ]
