DIGITAL ATTENUATOR. HMC939 Datasheet

HMC939 ATTENUATOR. Datasheet pdf. Equivalent

HMC939 Datasheet
Recommendation HMC939 Datasheet
Part HMC939
Description 1.0 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR
Feature HMC939; Attenuators - Digital - Chip v01.0511 Typical Applications The HMC939 is ideal for: • Fiber Optics .
Manufacture Analog Devices
Datasheet
Download HMC939 Datasheet




Analog Devices HMC939
v01.0511
Typical Applications
The HMC939 is ideal for:
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar & ECM
• Space Applications
HMC939
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 40 GHz
Features
1.0 dB LSB Steps to 31 dB
Single Positive Control Line Per Bit
±1.0 dB Typical Bit Error
High Input IP3: +43 dBm
Die Size: 2.29 x 0.95 x 0.1 mm
Functional Diagram
General Description
The HMC939 die is a broadband 5-bit GaAs IC
digital attenuator MMIC chip. Covering 0.1 to 40 GHz,
the insertion loss is less than 5 dB typical. The
attenuator bit values are 1.0 (LSB), 2, 4, 8, 16 for a
total attenuation of 31 dB. Attenuation accuracy is
excellent at less than ±1.0 dB typical step error with
an IIP3 of +43 dBm. Five control voltage inputs,
toggled between +5V and 0V, are used to select each
attenuation state.
0-1
Electrical Specifications, TA = +25° C, With Vdd = +5V, Vss = -5V & VCTL = 0/ +5V
Parameter
Frequency (GHz)
Min.
Typ. Max.
Insertion Loss
0.1 - 18 GHz
18 - 40 GHz
3.5 5.0
6.0 7.5
Attenuation Range
0.1 - 40 GHz
31
Return Loss (RF1 & RF2, All Atten. States)
0.1 - 40 GHz
12
Attenuation Accuracy: (Referenced to Insertion Loss)
1.0 - 15 dB States
16 - 31 dB States
0.1 - 40 GHz
0.1 - 40 GHz
± 0.5 + 5% of Atten. Setting Max
± 0.6 + 6% of Atten. Setting Max
Input Power for 0.1 dB Compression
0.1 - 0.5 GHz
0.5 - 40.0 GHz
20
25
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
0.1 - 0.5 GHz
0.5 - 40.0 GHz
40
43
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON/tOFF (50% CTL to 10/90% RF)
0.1 - 40 GHz
60
90
Idd
0.1 - 40 GHz
3
57
Iss
0.1 - 40 GHz
-4
-6 -8
Units
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
ns
ns
mA
mA
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Analog Devices HMC939
v01.0511
Insertion Loss vs. Temperature
0
-1
-2 +25 C
-3
+85 C
-55 C
-4
-5
-6
-7
-8
-9
0 5 10 15 20 25 30 35 40 45 50
FREQUENCY (GHz)
HMC939
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 40 GHz
Normalized Attenuation
(Only Major States are Shown)
0
-5
-10
-15
-20
-25
-30
-35
0
5 10 15 20 25 30 35 40 45 50
FREQUENCY (GHz)
Input Return Loss
(Only Major States are Shown)
0
-10
-20
-30
-40
-50
0
5 10 15 20 25 30 35 40 45 50
FREQUENCY (GHz)
Bit Error vs. Attenuation State
2
1.6
1.2
0.8
0.4
0
-0.4
-0.8 10 GHz
-1.2
20 GHz
40 GHz
-1.6
-2
0 4 8 12 16 20 24 28 32
ATTENUATION STATE (dB)
Output Return Loss
(Only Major States are Shown)
0
-10
-20
-30
-40
-50
0
5 10 15 20 25 30 35 40 45 50
FREQUENCY (GHz)
Bit Error vs. Frequency
(Only Major States are Shown)
3
2
31 dB
1
0
-1
-2
-3
0
5 10 15 20 25 30 35 40 45 50
FREQUENCY (GHz)
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0-2



Analog Devices HMC939
v01.0511
Relative Phase vs. Frequency
(Only Major States are Shown)
160
140
120
100
80
60
40
20
0
-20
0
31 dB
5 10 15 20 25 30 35 40 45 50
FREQUENCY (GHz)
HMC939
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 40 GHz
Step Attenuation vs. Attenuation State
2.4
10 GHz
2 20 GHz
40 GHz
1.6
1.2
0.8
0.4
0
-0.4
0 4 8 12 16 20 24 28 32
ATTENUATION STATE (dB)
Input IP3 Over Major Attenuation States
60
50
40
30
20
0
5 10 15 20 25 30 35 40
FREQUENCY (GHz)
Input IP3 vs. Temperature
(Minimum Attenuation State)
60
50
40
30
20
0.1
+25 C
+85 C
-40 C
1 10
FREQUENCY (GHz)
100
Input Power for 0.1 dB Compression
28
24
20
16
12
8
4
0.01
0.1 1 10
FREQUENCY (GHz)
100
0-3
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