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An RF/microwave balun (or transformer) is a device that will takes an input signal at a given output impedance and outputs the same signal and an inverted version of the signal at some output impedance. Our surface mount baluns are an excellent choice for analog to digital converters, digital to analog converters, samplers, balanced receivers, mixers, clock distribution, and general signal integrity applications. We offer two types of surface mount baluns: transmission line transformer baluns and capacitively coupled baluns.

The transmission line transformer baluns (BAL-0003SMG, BAL-0006SMG, and BAL-0009SMG) offer superior amplitude balance, phase balance, and common mode rejection to competing commercially available surface mount transformers. The BALH-0003SMG, BALH-0006SMG, and BALH-0009SMG are 1:1, high power versions with lower loss. They are ROHS compliant.

Electrical Specifications - Specifications guaranteed from -55 to +100°C, measured in a 50Ω system.
Parameter Frequency Range Min Typ Max
Nominal Insertion Loss (dB) 500 kHz to 9 GHz   6  
Nominal Phase Shift (Degrees)   180  
Amplitude Balance (dB)   ±0.6 ±1.6
Phase Balance (Degrees)   ±5 ±12
Common Mode Rejection (dB) 18 26  
Excess Insertion Loss (dB)1   1.5 3.5
Isolation (dB)   8  
VSWR   1.5  
Total Input Power (W)     1
Risetime /Falltime (ps)2   16  
1Excess Insertion Loss = (Common Port to Output Port Insertion Loss) – 6 dB. 2Specified as 90%/10%. Calculated from tbalun2= (tout2 – tin2)




BAL-0009SMGSurface Mount (SM)
EVAL-BAL-0009Connectorized Eval Fixture (EVAL)

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