HMC539LP3 / 539LP3E
v00.0605
0.25 dB LSB GaAs MMIC 5-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 4 GHz
5
Typical Applications
The HMC539LP3 / HMC539LP3E is ideal for both RF
and IF 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
• Cellular Infrastructure
• ISM, MMDS, WLAN, WiMAX, WiBro
• Microwave Radio & VSAT
• Test Equipment and Sensors
Single Control Line Per Bit
TTL/CMOS Compatible Control
Single +5V Supply
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 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 attenu-
ation of 7.75 dB. Attenuation accuracy is excellent
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,
TA = +25° C, With Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted)
Parameter
Frequency (GHz)
Min.
Typ.
Max.
Units
DC - 1.5 GHz
1.5 - 3.0 GHz
3.0 - 4.0 GHz
0.7
1.0
1.3
1.0
1.3
1.7
dB
dB
dB
Insertion Loss
Attenuation Range
DC - 4 GHz
7.75
dB
DC - 3 GHz
3.0 - 4.0 GHz
25
20
dB
dB
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy:
(Referenced to Insertion Loss)
DC - 3 GHz
3.0 - 4.0 GHz
(0.2 + 2% of Atten. Setting) Max.
(0.2 + 4% of Atten. Setting) Max.
dB
dB
All States
Input Power for 0.1 dB Compression
0.1 - 4.0 GHz
0.1 - 4.0 GHz
28
50
dBm
dBm
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
Switching Characteristics
DC - 4 GHz
tRISE, tFALL (10/90% RF)
48
52
ns
ns
tON, tOFF (50% CTL to 10/90% RF)
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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5 - 164
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