HMC424
HMC424 is 0.5dB LSB GaAs MMIC manufactured by Analog Devices.
Features
The HMC424 is ideal for:
0.5 d B LSB Steps to 31.5 d B
- Fiber Optics & Broadband Tele
Single Control Line Per Bit
- Microwave Radio & VSAT
±0.5 d B Typical Bit Error
- Military Radios, Radar & ECM
Die Size: 1.45 x 0.85 x 0.1 mm
- Space Applications
LETE Functional Diagram
General Description
The HMC424 die is a broadband 6-bit Ga As IC digital attenuator MMIC chip. Covering DC to 13 GHz, the insertion loss is less then 4 d B typical. The attenuator bit values are 0.5 (LSB), 1, 2, 4, 8, and 16 d B for a total attenuation of 31.5 d B. Attenuation accuracy is excellent at ± 0.5 d B typical step error with an IIP3 of +32 d Bm. Six control voltage inputs, toggled between 0 and -5V, are used to select each attenuation state. A single Vee bias of -5V allows operation at frequencies down to DC.
BSO Electrical Specifications, TA = +25° C, With Vee = -5V & VCTL = 0/-5V
Parameter
Frequency (GHz)
Min.
Typ.
O Insertion Loss
- 8.0 GHz
- 13.0 GHz
Max.
3.8 4.6
Units d B d B
Attenuation Range
- 13.0 GHz
31.5 d B
Return Loss (RF1 & RF2, All Atten. States) Attenuation Accuracy: (Referenced to Insertion Loss)
Input Power for 0.1 d B pression Input Third Order Intercept Point (Two-Tone Input Power= 0 d Bm Each Tone) Switching Characteristics
- 8.0 GHz
12 d B
- 13.0...
