HMC540LP3
/
540LP3E
1 dB LSB GaAs MMIC 4-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz
v00.0605
Typical Applications
Features
1 dB LSB Steps to 15 dB
+/- 0.2 dB Typical Step Error
Low Insertion Loss: 1.0 dB
High IP3: +50 dBm
Single Control Line Per Bit
TTL/CMOS Compatible Control
Single +5V Supply
6
ATTENUATORS - SMT
The HMC540LP3 / HMC540LP3E 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 HMC540LP3 & HMC540LP3E are broadband
4-bit GaAs IC digital attenuators in low cost leadless
surface mount packages. This single positive control
line per bit digital attenuator utilizes off chip AC ground
capacitors for near DC operation, making it suitable for
a wide variety of RF and IF applications. Covering DC
to 5.5 GHz, the insertion loss is less than 1.0 dB typical.
The attenuator bit values are 1 (LSB), 2, 4 and 8 dB for
a total attenuation of 15 dB. Attenuation accuracy is
excellent at ± 0.2 dB typical step error. The attenuator
also features a IIP3 of +50 dBm. Four 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
Frequency (GHz)
DC - 2.0 GHz
2.0 - 3.0 GHz
3.0 - 4.0 GHz
4.0 -5.5 GHz
DC - 5.5 GHz
DC - 3.5 GHz
3.5 - 5.5 GHz
DC - 1.0 GHz
1.0 - 4.0 GHz
4.0 - 5.0 GHz
5.0 - 5.5 GHz
0.1 - 5.5 GHz
REF - 4 dB States
5 - 15 dB States
0.1 - 5.5 GHz
Min.
Typ.
0.8
1.0
1.3
2.2
15
20
15
± (0.2 + 2% of Atten. Setting) Max.
± (0.2 + 3% of Atten. Setting) Max.
± (0.3 + 5% of Atten. Setting) Max.
± (0.4 + 8% of Atten. Setting) Max.
27
50
45
Max.
1.1
1.3
1.6
2.6
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
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
All States
DC -5.5 GHz
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
95
100
ns
ns
6 - 170
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 ]
