HMC472LP4
/
472LP4E
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
v06.1108
5
ATTENUATORS - DIGITAL - SMT
Typical Applications
The HMC472LP4(E) is ideal for:
• 3G Infrastructure & access points
• Cellular/3G, LTE & UMB
• WiMAX, WiBN & Fixed Wireless
• Test Equipment and Sensors
• GSM, WCDMA & TD-SCDMA
Features
0.5 dB LSB Steps to 31.5 dB
Single Control Line Per Bit
TTL/CMOS Compatible Control
± 0.25 dB Typical Step Error
Single +5V Supply
24 Lead Ceramic 4x4mm SMT Package: 16mm2
Included in the HMC-DK004 Designer’s Kit
Functional Diagram
General Description
The HMC472LP4 & HMC472LP4E are broadband
6-bit GaAs IC digital attenuators in low cost leadless
surface mount 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 3.8 GHz, the insertion loss is less
than 2.0 dB typical. The attenuator bit values are 0.5
(LSB), 1, 2, 4, 8, and 16 dB for a total attenuation of
31.5 dB. Attenuation accuracy is excellent at ± 0.25 dB
typical step error with an IIP3 of +45 dBm. Six TTL/
CMOS control inputs are used to select each attenua-
tion state. A single Vdd bias of +5V is required.
Electrical Specifi cations,
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)
All Attenuation States
0.5 - 3.5 dB States
4.0 - 31.5 dB States
All Attenuation States
All Attenuation States
Input Power for 0.1 dB Compression
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
Switching Characteristics
DC - 3.8 GHz
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
130
140
ns
ns
REF - 15.5 dB States
16.0 - 31.5 dB States
Frequency (GHz)
DC - 1.5 GHz
1.5 - 3.0 GHz
3.0 - 3.8 GHz
DC - 3.8 GHz
DC - 3.8 GHz
Min.
Typ.
1.5
2.0
2.3
31.5
15
Max.
1.8
2.3
3
Units
dB
dB
dB
dB
dB
DC - 1.0 GHz
1.0 - 2.2 GHz
1.0 - 2.2 GHz
2.2 - 3.0 GHz
3.0 - 3.8 GHz
0.1 - 3.8 GHz
0.1 - 3.8 GHz
± (0..20 + 3% of Atten. Setting) Max.
± (0.25 + 3% of Atten. Setting) Max.
± (0.15 + 4% of Atten. Setting) Max.
± (0.30 + 3% of Atten. Setting) Max
± (0.35 + 5% of Atten. Setting) Max.
20
45
35
dB
dB
dB
dB
dB
dBm
dBm
dBm
5 - 140
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
HMC472LP4 / 472LP4E
v06.1108
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
Insertion Loss
0
-0.5
INSERTION LOSS (dB)
-1
-1.5
-2
-2.5
-3
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
FREQUENCY (GHz)
+25C
+85C
-40C
Insertion Loss
0
-0.5
INSERTION LOSS (dB)
-1
-1.5
-2
-2.5
-3
0.05
+25 C
+85 C
-40 C
5
ATTENUATORS - DIGITAL - SMT
5 - 141
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
Return Loss RF1, RF2
(Only Major States are Shown)
0
-5
RETURN LOSS (dB)
-10
-15
-20
-25
-30
-35
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
FREQUENCY (GHz)
Return Loss RF1, RF2
(Only Major States are Shown)
0
-5
RETURN LOSS (dB)
-10
-15
-20
-25
31.5 dB
0.5-16 dB
-30
-35
0.05
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
0
NORMALIZED ATTENUATION (dB)
-5
-10
-15
-20
-25
-30
-35
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
0
NORMALIZED ATTENUATION (dB)
-5
-10
-15
-20
-25
-30
-35
0.05
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
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
HMC472LP4 / 472LP4E
v06.1108
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
5
ATTENUATORS - DIGITAL - SMT
Bit Error vs. Attenuation State
0
-0.1
-0.2
BIT ERROR (dB)
100 MHz
50 MHz
Bit Error vs. Attenuation State
2
1.5
1
BIT ERROR (dB)
0.5
0
-0.5
-1
3 GHz
3.8 GHz
-0.3
-0.4
-0.5
-0.6
-0.7
-0.8
200MHz, 300MHz, 350MHz
1 GHz
-0.9
-1
0
4
8
12
16
20
24
28
32
-1.5
100MHz, 2GHz
40MHz, 500 MHz
-2
0
4
8
12
16
20
24
28
32
ATTENUATION STATE (dB)
ATTENUATION STATE (dB)
Bit Error vs. Frequency
(Only Major States are Shown)
2
1.5
1
BIT ERROR (dB)
0.5
0
-0.5
-1
8 dB
0.5-4 dB
Bit Error vs. Frequency
(Only Major States are Shown)
2
1
BIT ERROR (dB)
0.5-4 dB
0
-1
16 dB
31.5 dB
8 dB
31.5 dB
16 dB
-1.5
-2
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
-2
0.05
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
FREQUENCY (GHz)
Bit Error vs. Frequency without
AC Ground Caps
(Only Major States are Shown)
3
2.5
2
1.5
BIT ERROR (dB)
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
0.5 - 8 dB
16 dB
31.5 dB
5 - 142
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
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