Device Overview

General Description

The MBAL-0250CSP2 is a GaAs passive MMIC 2:1 balun that features excellent 35 dB common mode rejection over a 2 to 50 GHz operational bandwidth. This device is an ideal solution for digital beamforming and other higher-order Nyquist sampling applications, as well as clock distribution and balanced amplifier interfaces. Available in a lead-free, RoHS compliant 2.5 x 2.5 mm CSP2 package, it is compatible with standard pick-and-place assembly processes.

Photo of MBAL-0250CSP2

Features

  • 2 GHz to 50 GHz
  • 2:1 Balun (50Ω Common to 100Ω Differential)
  • Optimal Phase and Amplitude Balance of 2° and 0.3 dB
  • 35 dB Common Mode Rejection
  • Compact 2.5mm chip scale package
  • This product embodies Marki Microwave's U.S. Pat. 11,869,858.

Applications

  • Balanced Receivers
  • Signal Integrity
  • Analog to Digital Converters
  • Balanced Amplifiers
  • Clock Distribution

Functional Block Diagram

Block Diagram

Part Ordering Options

Part NumberDescriptionPackageGreen StatusProduct LifecycleExport Classification
MBAL-0250CSP22-50 GHz Passive MMIC Chip Scale Package 1:2 BalunCSP2

REACH

RoHS

ReleasedEAR99
EVB-MBAL-0250Evaluation Board, 2-50 GHz Passive MMIC Chip Scale Package 1:2 BalunEVB

REACH

RoHS

ReleasedEAR99

Table Of Contents

Revision History

Revision CodeRevision DateComment
-2025-06-04Initial Release

Rev: - | Copyright © 2025 Marki Microwave LLC.

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Port Configuration and Functions

Port Functions

PortFunctionDescriptionDC Equivalent
Circuit
GNDGround Ground pad should be connected to RF/DC ground with low electrical and thermal resistance.Equivalent circuit for the Ground
Pin 1Common Port / In (Unbalanced) The common port is DC short to ground.Equivalent circuit for the Common Port / In (Unbalanced)
Pin 3Out 1 / 0° Port (Balanced) The 0° port is DC short to ground.Equivalent circuit for the Out 1 / 0° Port (Balanced)
Pin 4Out 2 / 180° Port (Balanced) The 180° port is DC short to ground.Equivalent circuit for the Out 2 / 180° Port (Balanced)
Pins 2,5NC Pins 2 and 5 are not internally connected. They can be connected to ground for normal operation.Equivalent circuit for the NC

Rev: - | Copyright © 2025 Marki Microwave LLC.

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Specifications

Absolute Maximum Ratings

ParameterMaximum RatingUnit
Maximum Operating Temperature 100°C
Maximum Storage Temperature 125°C
Minimum Operating Temperature -55°C
Minimum Storage Temperature -65°C

Package Information

ParameterDetailsRating
ESD250 to < 500 VoltsHBM Class 1A
Dimensions-2.50 x 2.50 mm
Moisture Sensitivity Level-MSL 1

Rev: - | Copyright © 2025 Marki Microwave LLC.

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Electrical Specifications

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
Amplitude Balance 25°C
2 50-0.3-dB
Common Mode Rejection 25°C
2 50-35-dB
Common Port Return Loss 25°C
2 50-16-dB
Impedance 25°C
2 50-50-Ω
Insertion Loss as a Mode Converter 25°C
2 50-5.3-dB
Isolation 25°C
2 50-7-dB
Nominal Phase Shift 25°C
2 50-180-°
Output Return Loss 25°C
2 50-9-dB
Phase Balance 25°C
2 50-2.1-°
Impedance Ratio -- --2:1-

Rev: - | Copyright © 2025 Marki Microwave LLC.

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Mixed Mode Scattering Parameters

Mixed mode scattering parameters are used to characterize differential circuits. For baluns, this means that the 0° and 180° ports become a single 100Ω differential port and the common port remains the same 50Ω common port. The two-port s-parameters of the balun are then characterized based on differential (d), common mode (c), or single-ended (s) signals. For example: Scs12 is the Common output response given a single ended input.

Insertion loss as a mode converter graph for MBAL-0250CSP2
Differential port return loss graph for MBAL-0250CSP2
Insertion loss of a common mode signal graph for MBAL-0250CSP2
Reflection converted between differential and common modes graph for MBAL-0250CSP2
Return loss of a common mode signal graph for MBAL-0250CSP2
Unbalanced port return loss graph for MBAL-0250CSP2

Rev: - | Copyright © 2025 Marki Microwave LLC.

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Typical Performance Scattering Parameters

Common to output port insertion loss and output to output port Isolation graph for MBAL-0250CSP2
Insertion Loss (dB) graph for MBAL-0250CSP2
Return Loss (dB) graph for MBAL-0250CSP2
Non-Adjacent Isolation (dB) graph for MBAL-0250CSP2
Amplitude Balance (dB) graph for MBAL-0250CSP2
Phase Balance (°) graph for MBAL-0250CSP2
Common Mode Rejection graph for MBAL-0250CSP2

Measured data is de-embedded from fixture using AFR.

Rev: - | Copyright © 2025 Marki Microwave LLC.

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Mechanical Data

Outline Drawing

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

Outline Drawing

EVB Out- refers to output Out 1

EVB Out+ refers to output Out 2

Rev: - | Copyright © 2025 Marki Microwave LLC.

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Rev: - | Copyright © 2025 Marki Microwave LLC.

9

Evaluation Board - Performance Data

ParameterTest ConditionsFrequency Range (GHz)MinTypMaxUnit
Impedance Ratio---2-

Rev: - | Copyright © 2025 Marki Microwave LLC.

10

Evaluation Board - Outline Drawing

Outline Drawing

Rev: - | Copyright © 2025 Marki Microwave LLC.

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