MAX9938

PRODUCTION

nanoPower, 4-Bump UCSP/SOT23, Precision Current-Sense Amplifier

Industry's Smallest Current-Sense Amplifier: 1mm x 1mm with I_CC < 1µA, V_OS < 500µV, Gain Error < 0.5%

Data Sheet (Rev. 7) Product Selection Table

Part Models: 18
1ku List Price: Starting From $0.77

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Part Details

Ultra-Low Supply Current of 1µA (max)
Low 500µV (max) Input Offset Voltage
Low < 0.5% (max) Gain Error
Input Common Mode: +1.6V to +28V
Voltage Output
Four Gain Versions Available
- +25V/V (MAX9938T)
- 50V/V (MAX9938F)
- 100V/V (MAX9938H)
- 200V/V (MAX9938W)
Tiny 1mm x 1mm x 0.6mm, 4-Bump UCSP, 5-Pin SOT23, or 2mm x 2mm x 0.8mm, 6-Pin µDFN Packages

Part Models: 18
1ku List Price: Starting From $0.77

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX9938FEBS+G45	Wafer-Level Package 2x2 Bump, Full Array	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938FEBS+TG45	Wafer-Level Package 2x2 Bump, Full Array	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938FELT+	Micro Dual Flatpack No Lead	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938FELT+T	Micro Dual Flatpack No Lead	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938FEUK+	Small-Outline Transistor Package	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938FEUK+T	Small-Outline Transistor Package	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938HEBS+G45	Wafer-Level Package 2x2 Bump, Full Array	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938HEBS+TG45	Wafer-Level Package 2x2 Bump, Full Array	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938HEUK+	Small-Outline Transistor Package	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938HEUK+T	Small-Outline Transistor Package	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938TEBS+G45	Wafer-Level Package 2x2 Bump, Full Array	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938TEBS+TG45	Wafer-Level Package 2x2 Bump, Full Array	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938TEUK+	Small-Outline Transistor Package	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938TEUK+T	Small-Outline Transistor Package	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938WEBS+G45	Wafer-Level Package 2x2 Bump, Full Array	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938WEBS+TG45	Wafer-Level Package 2x2 Bump, Full Array	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938WEUK+	Small-Outline Transistor Package	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX9938WEUK+T	Small-Outline Transistor Package	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 19, 2016 - 1594_AMENDED ASSEMBLY
		pcn_1594_amended
MAX9938FEBS+TG45	PRODUCTION
MAX9938HEBS+TG45	PRODUCTION
MAX9938TEBS+TG45	PRODUCTION
MAX9938WEBS+TG45	PRODUCTION
Dec 8, 2015 - 1594_PRE-PCN WAFER FAB
		pcn_1594_pre-pcn
MAX9938FEBS+TG45	PRODUCTION
MAX9938HEBS+TG45	PRODUCTION
MAX9938TEBS+TG45	PRODUCTION
MAX9938WEBS+TG45	PRODUCTION
Feb 4, 2015 - 1341_CANCELLATION ASSEMBLY
		pcn_1341_cancellation
MAX9938FEUK+	PRODUCTION
MAX9938FEUK+T	PRODUCTION
MAX9938HEUK+	PRODUCTION
MAX9938HEUK+T	PRODUCTION
MAX9938TEUK+	PRODUCTION
MAX9938TEUK+T	PRODUCTION
MAX9938WEUK+	PRODUCTION
MAX9938WEUK+T	PRODUCTION
Jan 11, 2021 - 1703RN ASSEMBLY
		pcn_1703rn
MAX9938WEUK+	PRODUCTION
MAX9938WEUK+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Current Sense Amplifiers 3
MAX4372	RECOMMENDED FOR NEW DESIGNS	Low-Cost, UCSP/SOT23, Micropower, High-Side Current-Sense Amplifier with Voltage Output
MAX4073	PRODUCTION	Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173	PRODUCTION	Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

Tools & Simulations

SPICE Model 1

MAX9938 SPICE Macro Model

Evaluation Kits

Evaluation Kit for the MAX9938

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Features and Benefits

Precision Real-Time Current Monitoring
1.6V to 28V Input Common-Mode Range
Lead-Free and RoHS Compliant
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX9938 evaluation kit (EV kit) provides a proven design to evaluate the MAX9938 high-side current-sense amplifier, which offers precision accuracy specifications of V_OS less than 500µV (max) and gain error less than 0.5% (max). This EV kit demonstrates the MAX9938 in a tiny 1mm x 1mm x 0.6mm, 4-bump UCSP™ package. The MAX9938 is also available in a 5-pin SOT23, but that package is not compatible with this EV kit.

The MAX9938 EV kit PCB comes with a MAX9938FEBS+ installed, which is the 50V/V gain version. Contact the factory for free samples of the pin-compatible MAX9938TEBS+ and MAX9938HEBS+, which are 25V/V and 100V/V gain versions, respectively.

Applications

Cell Phones
Notebook Computers
PDAs
Portable/Battery-Powered Systems
Power Management Systems

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