Rev: B | Copyright © 2026 Marki Microwave LLC.

General Description

The MBAL-0220PSM is a GaAs passive MMIC balun in a 3mm QFN surface mount package. This high isolation balun features excellent amplitude and phase balance across its 2 to 20 GHz frequency range and offers a 2:1 impedance ratio. The 3mm QFN package is a lead free, RoHS compliant package compatible with standard leaded and lead-free solder reflows. The MBAL-0220PSM is an excellent choice for balanced amplifiers, clock distribution, and higher order Nyquist sampling in analog to digital converters. The MBAL-0220PSM is a higher isolation, smaller form factor version of the MBAL-0220SM.

Features

  • 2:1 Balun (Balanced to Unbalanced Transformer)
  • High Isolation, 17dB Typical
  • Broadband Operation, 2 to 20 GHz
  • Insertion Loss as a Mode Converter, 2.7 dB Typical
  • Common Mode Rejection, 38 dB Typical

Functional Block Diagram

Block Diagram
Photo of MBAL-0220PSM

Electrical Performance Summary

ParameterTypUnit
Frequency Range2 to 20GHz
Insertion Loss as a Mode Converter 2.7dB
Phase Balance 0.7°
Amplitude Balance 0.1dB
Impedance Ratio 2:1-
Common Mode Rejection 38dB

Summary only – refer to the Electrical Specifications, Absolute Maximum Ratings, and Recommended Operating Range tables for complete details.

Part Ordering Options

Part NumberDescriptionPackageGreen StatusProduct LifecycleExport Classification
MBAL-0220PSM2 - 20 GHz MMIC Isolation BalunQFN

REACH

RoHS

ReleasedEAR99
EVB-MBAL-0220PEvaluation Board, 2-20 GHz Passive MMIC QFN Package BalunEVB

REACH

RoHS

ReleasedEAR99

Table Of Contents

Mixed Mode Scattering Parameters

Insertion Loss as a Mode Converter (dB) graph for MBAL-0220PSM
Common Mode Insertion Loss (dB) graph for MBAL-0220PSM
Unbalanced Port Return Loss (dB) graph for MBAL-0220PSM
Differential Port Return Loss (dB) graph for MBAL-0220PSM
Differential Return Loss given a Common Mode Input (dB) graph for MBAL-0220PSM
Common Mode Return Loss (dB) graph for MBAL-0220PSM

Typical Performance Scattering Parameters

Insertion Loss (dB) graph for MBAL-0220PSM
Return Loss (dB) graph for MBAL-0220PSM
Phase Balance (°) graph for MBAL-0220PSM
Amplitude Balance (dB) graph for MBAL-0220PSM
Isolation (dB) graph for MBAL-0220PSM
Common Mode Rejection (dB) graph for MBAL-0220PSM

Specifications

Electrical Specifications

Specifications guaranteed for +25°C, measured in a 50Ω system. Measured data was taken on an evaluation board and de-embedded to surface mount launch unless otherwise noted.

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
Frequency Range-2 20---GHz
Insertion Loss as a Mode Converter Temp = 25°C
2 20-2.7-dB
Nominal Phase Shift Temp = 25°C
- --180-°
Common Port Return Loss Temp = 25°C
2 20-14-dB
Common Port Return Loss Temp = 25°C
2 20-14.2-dB
Common Mode Return Loss Temp = 25°C
2 20-11-dB
Output Return Loss Temp = 25°C
2 20-16-dB
Isolation Temp = 25°C
2 20-17-dB
Amplitude Balance Temp = 25°C
2 20-0.1-dB
Phase Balance Temp = 25°C
2 20-0.7-°
Common Mode Rejection Temp = 25°C
2 20-38-dB
Impedance Temp = 25°C
- --50-Ω
Impedance Ratio -- --2:1--

Absolute Maximum Ratings

The Absolute Maximum Ratings indicate limits beyond which damage may occur to the device. If these limits are exceeded, the device may be inoperable or have a reduced lifetime.

ParameterMaximum RatingUnit
Maximum Operating Temperature 85°C
Maximum Storage Temperature 150°C
Minimum Operating Temperature -40°C
Minimum Storage Temperature -65°C
RF Power Handling 37dBm

Package Information

ParameterDetailsRating
ESD250 to < 500 VoltsHBM Class 1A
Dimensions-3 x 3 mm
Moisture Sensitivity Level-MSL 1

Port Configuration and Functions

Port Diagram

Below is the port diagram for the MBAL-0220PSM. The diagram is shown as an x-ray view from the top down.

Diagram of the port configuration for MBAL-0220PSM

Port Functions

PortFunctionDescriptionDC Equivalent
Circuit
2Common/Input Pin 2 is DC short to ground.Equivalent circuit for the Common/Input
7Out 1 / 0° Port (Balanced) Pin 7 is DC open to ground.Equivalent circuit for the Out 1 / 0° Port (Balanced)
9Out 2 / 180° Port (Balanced) Pin 9 is DC open to ground.Equivalent circuit for the Out 2 / 180° Port (Balanced)
PaddleGround Ground paddle should be connected to RF ground.Equivalent circuit for the Ground
Pins 1,3,4,5,6,8,10,11,12Non-connect (NC) These pins are not connected internally. Datasheet performance is tested with NC pins grounded.Equivalent circuit for the Non-connect (NC)

Mechanical Data

Outline Drawing

Download : Outline 2D Drawing Outline 3D Drawing Outline 3D STP

Outline Drawing

Evaluation Board

Evaluation Board - Outline Drawing

Outline Drawing

Revision History

Revision CodeRevision DateComment
-2026-03-05Initial Release
B2026-04-23Updated RF Power Handling

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