ATTENUATORS - SMT
5
5 - 170
HMC540LP3 / 540LP3E
v00.0605
1 dB LSB GaAs MMIC 4-BIT DIGITAL
POSITIVE CONTROL ATTENUAT...
ATTENUATORS - SMT
5
5 - 170
HMC540LP3 / 540LP3E
v00.0605
1 dB LSB GaAs MMIC 4-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz
Typical Applications
Features
The HMC540LP3 / HMC540LP3E is ideal for both RF
1 dB LSB Steps to 15 dB
and IF applications:
± 0.2 dB Typical Step Error
Cellular Infrastructure
Low Insertion Loss: 1 dB
ISM, MMDS, WLAN, WiMAX, WiBro Microwave Radio & VSAT Test Equipment and Sensors
Functional Diagram
High IP3: +50 dBm Single Control Line Per Bit TTL/
CMOS Compatible Control Single +5V Supply 3x3 mm SMT Package
E General Discription
The HMC540LP3 & HMC540LP3E are broadband
T 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
E 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
Lthan 1 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
OdBm. Four TTL/
CMOS control inputs are used to select each attenuation state. A single Vdd bias of +5V is required.
S Electrical Specifications,
TA = +25° C, With Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted)
Parameter
B Insertion Loss
Frequency (GHz)
Min.
Typ.
DC - 2.0 GHz
0.8
2.0 - 3.0 GHz
1.0
3.0 - 4.0 GHz
1.3
4....