HMC941A Datasheet, PDF (1/6 Pages) Analog Devices – 0.5 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, 0.1 - 30 GHz

HMC941A
v01.1016
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 30 GHz
1
Typical Applications
The HMC941A is ideal for:
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar & ECM
• Space Applications
Features
0.5 dB LSB Steps to 15.5 dB
Single Positive Control Line Per Bit
±0.5 dB Typical Bit Error
High Input IP3: +45 dBm
Die Size: 2.35 x 1 x 0.1 mm
Functional Diagram
General Description
The HMC941A die is a broadband 5-bit GaAs IC digi-
tal attenuator MMIC chip. Covering 0.1 to 30 GHz, the
insertion loss is less than 4 dB typical. The attenuator
bit values are 0.5 (LSB), 1, 2, 4, 8, for a total attenu-
ation of 15.5 dB. Attenuation accuracy is excellent
at less than ± 0.5 dB typical step error with an IIP3
of +45 dBm. Five control voltage inputs, toggled
between +5V and 0V, are used to select each attenu-
ation state.
Electrical Specifications, T_A = +25° C, With Vdd = +5V, Vss = -5V & VCTL = 0/ +5V
Parameter
Frequency (GHz)
Min.
Typ.
Max.
Units
Insertion Loss
0.1 - 18.0 GHz
18.0 - 30.0 GHz
3.3
4.3
dB
4.3
5.1
dB
Attenuation Range
0.1 - 30.0 GHz
15.5
dB
Return Loss (RF1 & RF2, All Atten. States)
0.1 - 30.0 GHz
12
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
0.5 - 7.5 dB States 0.1 - 30.0 GHz ± (0.3 + 4% of Atten. Setting )Max dB
8 - 15.5 dB States 0.1 - 30.0 GHz ± (0.3 + 5% of Atten. Setting) Max dB
Input Power for 0.1 dB Compression
0.1 - 0.5 GHz
0.5 - 30.0 GHz
22
dBm
26
dBm
Input Third Order Intercept Point
(Two-Tone Input Power= +8 dBm Each Tone)
0.1 - 0.5 GHz
0.5 - 30.0 GHz
45
dBm
43
dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON/tOFF (50% CTL to 10/90% RF)
0.1 - 30.0 GHz
35
ns
50
ns
Idd
0.1 - 30.0 GHz
3
5
7
mA
Iss
0.1 - 30.0 GHz
-4
-6
-8
mA
1-1
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