5
5 - 144
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20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
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HMC470LP3 / 470LP3E
1 dB LSB GaAs MMIC 5-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 3 GHz
v04.1108
Functional Diagram
Electrical Specifi cations,
T
A
= +25?C, With Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted)
The HMC470LP3(E) is ideal for:
" Cellular; UMTS/3G Infrastructure
" ISM, MMDS, WLAN, WiMAX
" Microwave Radio & VSAT
" Test Equipment and Sensors
1 dB LSB Steps to 31 dB
Single Control Line Per Bit
TTL/CMOS Compatible Control
?0.3 dB Typical Step Error
Single +5V Supply
16 Lead 3x3mm SMT Package: 9mm2
Included in the HMC-DK004 Designers Kit
The HMC470LP3(E) is a broadband 5-bit GaAs IC
digital attenuators in low cost leadless surface mo-
unt packages. This single positive control line per
bit digital attenuator incorporates off chip AC ground
capacitors for near DC operation, making it suitable
for a wide variety of RF and IF applications. Covering
DC to 3 GHz, the insertion loss is less than 1.5 dB
typical. The attenuator bit values are 1 (LSB), 2, 4, 8,
and 16 dB for a total attenuation of 31 dB. Attenuation
accuracy is excellent at ?0.3 dB typical step error with
an IIP3 of +45 dBm. Five TTL/CMOS control inputs
are used to select each attenuation state. A single Vdd
bias of +5V is required.
Parameter
Frequency (GHz)
Min.
Typ.
Max.
Units
Insertion Loss
DC - 1.5 GHz
1.5 - 2.3 GHz
2.3 - 3.0 GHz
1.3
1.4
1.7
1.6
1.7
2.0
dB
dB
dB
Attenuation Range
DC - 3 GHz
31
dB
Return Loss (RF1 & RF2, All Atten. States)
DC - 3 GHz
17
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
All Attenuation States
1.0 - 15.0 dB States
16.0 - 31.0 dB States
DC - 2.3 GHz
2.3 - 3.0 GHz
2.3 - 3.0 GHz
?(0.3 + 2% of Atten. Setting) Max.
?(0.3 + 3% of Atten. Setting) Max.
?(0.3 + 6% of Atten. Setting) Max.
dB
dB
dB
Input Power for 0.1 dB Compression
0.1 - 3.0 GHz
20
dBm
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
REF - 15 dB
States
16 - 31 dB States
0.1 - 3.0 GHz
45
35
dBm
dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
DC - 3 GHz
160
180
ns
ns
Typical Applications
Features
General Description
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