HMC424_09 Datasheet, PDF (1/6 Pages) Hittite Microwave Corporation – 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 13 GHz

v06.0809
1
Typical Applications
The HMC424 is ideal for:
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar & ECM
• Space Applications
HMC424
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
Features
0.5 dB LSB Steps to 31.5 dB
Single Control Line Per Bit
±0.5 dB Typical Bit Error
Die Size: 1.45 x 0.85 x 0.1 mm
Functional Diagram
General Description
The HMC424 die is a broadband 6-bit GaAs IC digital
attenuator MMIC chip. Covering DC to 13 GHz, the
insertion loss is less then 4 dB typical. The attenua-
tor 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 ± 0.5 dB typical step error with an IIP3 of
+32 dBm. Six control voltage inputs, toggled bet-
ween 0 and -5V, are used to select each attenuation
state. A single Vee bias of -5V allows operation at fre-
quencies down to DC.
1-8
Electrical Specifications, T_A = +25° C, With Vee = -5V & VCTL = 0/-5V
Parameter
Frequency (GHz)
Min.
Typ.
Max.
Insertion Loss
DC - 8.0 GHz
8.0 - 13.0 GHz
3.0
3.8
4.0
4.6
Attenuation Range
DC - 13.0 GHz
31.5
Return Loss (RF1 & RF2, All Atten. States)
DC - 8.0 GHz
8
12
8.0 - 13.0 GHz
11
15
Attenuation Accuracy: (Referenced to Insertion Loss)
0.5 - 7.5 dB States DC - 13.0 GHz
8 - 31.5 dB States DC - 13.0 GHz
± 0.3 + 4% of Atten. Setting Max
± 0.3 + 6% of Atten. Setting Max
Input Power for 0.1 dB Compression
1.0 - 13.0 Ghz
22
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
REF State
All Other States
1.0 - 13.0 Ghz
46
32
Switching Characteristics
DC - 13.0 GHz
tRISE, tFALL (10/90% RF)
30
tON/tOFF (50% CTL to 10/90% RF)
50
Units
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
ns
ns
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
Order On-line at www.hittite.com