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Status
Part Number	Status	Replacement
MAX471	This product is No Longer Available. See Ordering Information for recommended replacements.	MAX4072
MAX472	This product is No Longer Available. See Ordering Information for recommended replacements.	MAX4072

Data Sheet

FULL DATA SHEET (PDF, 136kB) Download   E-Mail

Description

The MAX471/MAX472 are complete, bidirectional, high-side current-sense amplifiers for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical. High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with the ground paths of the battery chargers or monitors often found in "smart" batteries. The MAX471 has an internal 35mΩ current-sense resistor and measures battery currents up to ±3A. For applications requiring higher current or increased flexibility, the MAX472 functions with external sense and gain-setting resistors. Both devices have a current output that can be converted to a ground-referred voltage with a single resistor, allowing a wide range of battery voltages and currents. An open-collector SIGN output indicates current-flow direction, so the user can monitor whether a battery is being charged or discharged. Both devices operate from 3V to 36V, draw less than 100µA over temperature, and include a 18µA max shutdown mode.

Key Features		Applications/Uses
Complete High-Side Current Sensing Precision Internal Sense Resistor (MAX471) 2% Accuracy Over Temperature Monitors Both Charge and Discharge 3A Sense Capability with Internal Sense Resistor (MAX471) Higher Current-Sense Capability with External Sense Resistor (MAX472) 100µA Max Supply Current 18µA Max Shutdown Mode 3V to 36V Supply Operation 8-Pin DIP/SO Packages		Battery-Powered Applications Cell Phones Energy Management Portable PCs: Notebooks, Subnotebooks, Palmtops Portable Phones Portable Test/Measurement Systems Smart Battery Packs/Chargers

Diagram

Typical Operating Circuit

Application Notes

Application Note 621: Simple Circuit Charges Lead-Acid Batteries - MAX471 Application Note 714: Isolated Power Supplies for Telecom Applications - MAX471 Application Note 746: High-Side Current-Sense Measurement: Circuits and Principles - MAX471, MAX472 Application Note 823: Two ICs Convert 4-20mA Signal to 0-5V Output - MAX472 Application Note 921: Variable, Linear Current Source Operates On 5V - MAX472 Application Note 924: Step-Up Supply Charges Battery While Serving Load - MAX472 Application Note 927: Current-Sense IC Prevents Overcurrent Damage - MAX471 Application Note 1138: Practical Data Acquisition using a Windows¹-based Power Meter - MAX471 Application Note 1170: Circuit Connection Adds Current-Mode Operation To PFM Boost Converters - MAX471 Application Note 1934: Add High Voltage Capability to the MAX471/MAX472 High-Side Current Sense Amplifiers - MAX471, MAX472

Design Guides

Amplifiers and Sensors (PDF) Video (PDF) Thermal Management (PDF) Wireless (PDF)

Reliability Reports

Show FIT data for: MAX471 MAX472 Request Reliability Report for: MAX471 MAX472

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-22 of 22

MAX471	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX471CPA		N/A	No Longer Available	MAX4071	PDIP(N);8 pin;80 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P8-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX471EPA		N/A	No Longer Available	MAX4071	PDIP(N);8 pin;80 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P8-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX471CSA		N/A	No Longer Available	MAX4071	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-8F*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX471CSA-T		N/A	No Longer Available	MAX4071	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-8F*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX471CSA+		N/A	No Longer Available	MAX4071	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+8F*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX471CSA+T		N/A	No Longer Available	MAX4071	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+8F*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX471ESA		N/A	No Longer Available	MAX4071	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-8F*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX471ESA-T		N/A	No Longer Available	MAX4071	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-8F*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX471ESA+		N/A	No Longer Available	MAX4071	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+8F*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX471ESA+T		N/A	No Longer Available	MAX4071	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+8F*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX472	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX472CPA		N/A	No Longer Available	MAX4070	PDIP(N);8 pin;80 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P8-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX472CPA+		N/A	No Longer Available	MAX4070	PDIP(N);8 pin;80 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P8+2*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX472EPA		N/A	No Longer Available	MAX4070	PDIP(N);8 pin;80 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P8-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX472EPA+		N/A	No Longer Available	MAX4070	PDIP(N);8 pin;80 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX472CSA		N/A	No Longer Available	MAX4070	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-5*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX472CSA-T		N/A	No Longer Available	MAX4070	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX472CSA+		N/A	No Longer Available	MAX4070	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX472CSA+T		N/A	No Longer Available	MAX4070	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX472ESA		N/A	No Longer Available	MAX4070	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX472ESA-T		N/A	No Longer Available	MAX4070	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX472ESA+		N/A	No Longer Available	MAX4070	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX472ESA+T		N/A	No Longer Available	MAX4070	SOIC(N);8 pin;31 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Notes and Comments

Precision, high-side current-sense amplifier with internal sense resistor, measures charge and discharge (MAX471) Precision, high-side current-sense amplifier using external resistors (MAX472)

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