Rev: C | Copyright © 2025 - 2026 Marki Microwave LLC.

General Description

The MBALH-0R520CSP2 is a GaAs passive MMIC 1:1 balun that features excellent 32 dB common mode rejection over a 0.5 to 20 GHz operational bandwidth. The MBALH-0R520CSP2 is footprint compatible with the 2:1 MBAL-0R520CSP2, offering flexibility in system design. For ADC and DAC interface applications, the choice between the 1:2 and 1:1 configurations will depend on specific system requirements. 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.

Features

  • 0.5 GHz to 20 GHz
  • 1:1 Balun (50Ω Common to 50Ω Differential)
  • Optimal Phase and Amplitude Balance of 2° and 0.3 dB
  • 32 dB Common Mode Rejection
  • Compact 2.5mm chip scale package
  • This product embodies Marki Microwave's U.S. Pat. 11,869,858.

Functional Block Diagram

Block Diagram
Photo of MBALH-0R520CSP2

Electrical Performance Summary

ParameterTypUnit
Frequency Range0.5 to 20GHz
Insertion Loss as a Mode Converter 3.6dB
Phase Balance 2°
Amplitude Balance 0.3dB
Impedance Ratio 1:1-
Common Mode Rejection 32dB

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
MBALH-0R520CSP20.5-20 GHz Passive MMIC Chip Scale Package 1:1 BalunCSP2

REACH

RoHS

ReleasedEAR99
EVB-MBALH-0R520Evaluation Board, 0.5-20 GHz Passive MMIC Chip Scale Package 1:1 BalunEVB

REACH

RoHS

ReleasedEAR99

Table Of Contents

Mixed Mode Scattering Parameters in 50 Ohm Differential System

Mixed mode scattering parameters are used to characterize differential circuits. For baluns, this means that the 0° and 180° ports become a single 50Ω differential port and the common port remains the same 50Ω common port. For more information about 1:1 balun data, visitMBAL vs. MBALH Data. 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 MBALH-0R520CSP2
Differential port return loss graph for MBALH-0R520CSP2
Insertion loss of a common mode signal graph for MBALH-0R520CSP2
Reflection converted between differential and common modes graph for MBALH-0R520CSP2
Return loss of a common mode signal graph for MBALH-0R520CSP2
Unbalanced port return loss graph for MBALH-0R520CSP2

All measurements are de-embedded from the fixture with Automatic Fixture Removal (AFR).

Typical Performance Scattering Parameters in 50 Ohm Differential System

Common to output port insertion loss and output to output port Isolation graph for MBALH-0R520CSP2
Insertion Loss (Output 2) graph for MBALH-0R520CSP2
Return Loss (dB) graph for MBALH-0R520CSP2
Non-Adjacent Isolation (dB) graph for MBALH-0R520CSP2
Amplitude Balance (dB) graph for MBALH-0R520CSP2
Phase Balance (°) graph for MBALH-0R520CSP2
Common Mode Rejection graph for MBALH-0R520CSP2

All measurements are de-embedded from the fixture with Automatic Fixture Removal (AFR).

Mixed Mode Scattering Parameters in 100 Ohm Differential System

Insertion loss as a mode converter graph for MBALH-0R520CSP2
Differential port return loss graph for MBALH-0R520CSP2
Insertion loss of a common mode signal graph for MBALH-0R520CSP2
Reflection converted between differential and common modes graph for MBALH-0R520CSP2
Return loss of a common mode signal graph for MBALH-0R520CSP2
Unbalanced port return loss graph for MBALH-0R520CSP2

All measurements are de-embedded from the fixture with Automatic Fixture Removal (AFR).

Typical Performance Scattering Parameters in 100 Ohm Differential System

Insertion Loss graph for MBALH-0R520CSP2
RFC Return Loss vs Temperature graph for MBALH-0R520CSP2
Isolation (dB) graph for MBALH-0R520CSP2
Amplitude Balance (dB) graph for MBALH-0R520CSP2
Phase Balance (°) graph for MBALH-0R520CSP2
Common Mode Rejection (dB) graph for MBALH-0R520CSP2

All measurements are de-embedded from the fixture with Automatic Fixture Removal (AFR).

Specifications

Electrical Specifications

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
Frequency Range-0.5 20---GHz
Amplitude Balance 25°C
0.5 20-0.3-dB
Common Mode Rejection 25°C
0.5 20-32-dB
Common Port Return Loss 25°C
0.5 20-16-dB
Impedance 25°C
0.5 20-50-Ω
Insertion Loss as a Mode Converter 25°C
0.5 20-3.6-dB
Isolation 25°C
0.5 20-9-dB
Nominal Phase Shift 25°C
0.5 20-180-°
Output Return Loss 25°C
0.5 20-7-dB
Phase Balance 25°C
0.5 20-2-°
Impedance Ratio -- --1:1--

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
RF Power Handling 37dBm

Package Information

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

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 open.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

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

Evaluation Board

Evaluation Board - Electrical Specification

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
Frequency Range-- ----GHz
Impedance Ratio -- --1:1--

Evaluation Board - Outline Drawing

Outline Drawing

Revision History

Revision CodeRevision DateComment
-2025-04-21Initial Release
A2025-04-28Updated Moisture Sensitivity from MSL3 to MSL1
B2026-04-23Updated RF Power Handling
C2026-06-03Updated Port Description

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