MAX9928FEUKIT+

MAX9928FEUKIT+ Datasheet

MAX9928/MAX9929

Part	Datasheet
MAX9928FEUKIT+	MAX9928FEUKIT+ (pdf)

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MAX9928/MAX9929 EVAALVUAAILTAIOBNLEKIT -0.1V to +28V Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers The MAX9928/MAX9929 low-cost, uni-/bidirectional, high-side, current-sense amplifiers are ideal for monitoring battery charge and discharge currents in notebooks, cell phones, and other portable equipment. These devices feature a wide -0.1V to +28V input common-mode voltage range, low 20µA supply current with VOS less than 0.4mV, and a gain accuracy better than The input common-mode range is independent of the supply voltage, ensuring that the current-sense information remains accurate even when the measurement rail is shorted to ground. The MAX9928F features a current output with a transconductance ratio of 5µA/mV. An external resistor converts the output current to a voltage, allowing adjustable gain so that the input sense voltage can be matched to the maximum ADC input swing. The MAX9929F has a voltage output and integrates a 10kΩ output resistor for a fixed voltage gain of 50V/V. A digital SIGN output indicates direction of current flow, so the user can utilize the full ADC input range for measuring both charging and discharging currents. The MAX9928/MAX9929 are fully specified over the -40°C to +125°C automotive temperature range, and available in 6-bump UCSP 1mm x 1.5mm and 8-pin packages. The UCSP package is bump-to-bump compatible with the MAX4372_EBT. UCSP is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc. Pin Configurations and Typical Operating Circuit appear at end of data sheet. o Wide -0.1V to +28V Common-Mode Range, Independent of Supply Voltage o 2.5V to 5.5V Operating Supply Voltage o 20µA Quiescent Supply Current o 0.4mV max Input Offset Voltage o Gain Accuracy Better than 1% max o SIGN Output Indicates Current Polarity o Transconductance and Gain Versions Available 5µA/mV MAX9928F 50V/V MAX9929F o Pin Compatible with the MAX4372 in UCSP o Available in Ultra-Small, 3x2 UCSP 1mm x 1.5mm and 8-Pin µMAX Packages Monitoring Charge/Discharge Currents in Portable/Battery-Powered Systems Notebook Computers General-System/Board-Level Current Monitoring Smart-Battery Packs/Chargers Precision Current Sources Smart Cell Phones Super Capacitor Charge/Discharge Ordering Information PART OUTPUT TYPE GAIN PIN-PACKAGE TOP MARK MAX9928FAUA+ MAX9928FABT+T * MAX9929FAUA+ MAX9929FABT+T * Current Voltage Gm = 5µA/mV Gm = 5µA/mV AV = 50V/V AV = 50V/V 8 µMAX 3x2 UCSP 8 µMAX 3x2 UCSP +AAA +AAB Note All devices are specified over the -40°C to +125°C operating temperature range. +Denotes a lead-free/RoHS-compliant package. *The MAX9928FABT and the MAX9929FABT use Package Code R61A1+1 with backside coating to minimize die chipping. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at MAX9928/MAX9929 -0.1V to +28V Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers ABSOLUTE MAXIMUM RATINGS VCC, SIGN to GND to +6V RS+, RS- to +30V OUT to GND to VCC + 0.3V Differential Input Voltage VRS+ - VRS- ±30V OUT, SIGN Short Circuit to VCC or GND ...................Continuous Current into Any Continuous Power Dissipation TA = +70°C 6-Bump 1mm x 1.5mm UCSP derate 3.9mW/°C above +70°C ............................308.3mW 8-Pin µMAX derate 4.8mW/°C above +70°C .............388mW Operating Temperature Range ........................-40°C to +125°C Storage Temperature Range ............................-65°C to +150°C Junction Temperature Lead Temperature soldering, 10s .................................+300°C Lead Temperature reflow Bump Temperature reflow Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS VRS+ = -0.1V to +28V, VCC = 3.3V, VSENSE = VRS+ - VRS- = 0V, ROUT = 10kΩ for MAX9928F, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. Note 1 PARAMETER CONDITIONS MIN TYP MAX UNITS AMPLIFIER DC ELECTRICAL CHARACTERISTICS Input Offset Voltage Note 2 VRS+ = 3.6V VOS VRS+ = -0.1V TA = +25°C TA = -40°C to +125°C TA = +25°C TA = -40°C to +125°C Common-Mode Input Range VCMR Note 3 Common-Mode Rejection Ratio CMRR 2V VRS+ 28V -0.1V VRS+ +2V TA = +25°C TA = -40°C to +125°C TA = +25°C TA = -40°C to +125°C Full-Scale Sense Voltage Note 2 VSENSE MAX992_F Gain Note 2 MAX9929F Gain Accuracy Notes 2, 6 MAX9929F, VRS+ = 3.6V MAX9929F, VRS+ = -0.1V TA = +25°C TA = -40°C to +125°C TA = +25°C TA = -40°C to +125°C Transconductance Note 2 Transconductance Accuracy Note 2 GM MAX9928F MAX9928F, TA = +25°C VRS+ = 3.6V TA = -40°C to +125°C MAX9928F,

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MAX9928/MAX9929

EVAALVUAAILTAIOBNLEKIT
-0.1V to +28V Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers

The MAX9928/MAX9929 low-cost, uni-/bidirectional, high-side, current-sense amplifiers are ideal for monitoring battery charge and discharge currents in notebooks, cell phones, and other portable equipment. These devices feature a wide -0.1V to +28V input common-mode voltage range, low 20µA supply current with VOS less than 0.4mV, and a gain accuracy better than The input common-mode range is independent of the supply voltage, ensuring that the current-sense information remains accurate even when the measurement rail is shorted to ground.

The MAX9928F features a current output with a transconductance ratio of 5µA/mV. An external resistor converts the output current to a voltage, allowing adjustable gain so that the input sense voltage can be matched to the maximum ADC input swing. The MAX9929F has a voltage output and integrates a 10kΩ output resistor for a fixed voltage gain of 50V/V.

A digital SIGN output indicates direction of current flow, so the user can utilize the full ADC input range for measuring both charging and discharging currents.

The MAX9928/MAX9929 are fully specified over the -40°C to +125°C automotive temperature range, and available in 6-bump UCSP 1mm x 1.5mm and 8-pin packages. The UCSP package is bump-to-bump compatible with the MAX4372_EBT.

UCSP is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc.

Pin Configurations and Typical Operating Circuit appear at end of data sheet.
o Wide -0.1V to +28V Common-Mode Range, Independent of Supply Voltage
o 2.5V to 5.5V Operating Supply Voltage o 20µA Quiescent Supply Current o 0.4mV max Input Offset Voltage o Gain Accuracy Better than 1% max o SIGN Output Indicates Current Polarity o Transconductance and Gain Versions Available
5µA/mV MAX9928F 50V/V MAX9929F o Pin Compatible with the MAX4372 in UCSP o Available in Ultra-Small, 3x2 UCSP 1mm x 1.5mm and 8-Pin µMAX Packages

Monitoring Charge/Discharge Currents in Portable/Battery-Powered Systems Notebook Computers General-System/Board-Level Current Monitoring Smart-Battery Packs/Chargers Precision Current Sources Smart Cell Phones Super Capacitor Charge/Discharge
Ordering Information

PART

OUTPUT TYPE

GAIN

PIN-PACKAGE

TOP MARK

MAX9928FAUA+ MAX9928FABT+T * MAX9929FAUA+ MAX9929FABT+T *

Current Voltage

Gm = 5µA/mV Gm = 5µA/mV

AV = 50V/V AV = 50V/V
8 µMAX 3x2 UCSP 8 µMAX 3x2 UCSP
+AAA
+AAB

Note All devices are specified over the -40°C to +125°C operating temperature range.
+Denotes a lead-free/RoHS-compliant package. *The MAX9928FABT and the MAX9929FABT use Package Code R61A1+1 with backside coating to minimize die chipping.

Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at

MAX9928/MAX9929
-0.1V to +28V Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers

ABSOLUTE MAXIMUM RATINGS

VCC, SIGN to GND to +6V RS+, RS- to +30V OUT to GND to VCC + 0.3V Differential Input Voltage VRS+ - VRS- ±30V OUT, SIGN Short Circuit to VCC or GND ...................Continuous Current into Any Continuous Power Dissipation TA = +70°C
6-Bump 1mm x 1.5mm UCSP derate 3.9mW/°C above +70°C ............................308.3mW
8-Pin µMAX derate 4.8mW/°C above +70°C .............388mW

Operating Temperature Range ........................-40°C to +125°C Storage Temperature Range ............................-65°C to +150°C Junction Temperature Lead Temperature soldering, 10s .................................+300°C Lead Temperature reflow Bump Temperature reflow

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

VRS+ = -0.1V to +28V, VCC = 3.3V, VSENSE = VRS+ - VRS- = 0V, ROUT = 10kΩ for MAX9928F, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. Note 1

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

AMPLIFIER DC ELECTRICAL CHARACTERISTICS

Input Offset Voltage Note 2

VRS+ = 3.6V VOS

VRS+ = -0.1V

TA = +25°C TA = -40°C to +125°C TA = +25°C TA = -40°C to +125°C

Common-Mode Input Range

VCMR Note 3

Common-Mode Rejection Ratio

CMRR
2V VRS+ 28V
-0.1V VRS+ +2V

TA = +25°C TA = -40°C to +125°C TA = +25°C TA = -40°C to +125°C

Full-Scale Sense Voltage Note 2 VSENSE MAX992_F

Gain Note 2

MAX9929F

Gain Accuracy Notes 2, 6

MAX9929F, VRS+ = 3.6V

MAX9929F, VRS+ = -0.1V

TA = +25°C TA = -40°C to +125°C TA = +25°C TA = -40°C to +125°C

Transconductance Note 2

Transconductance Accuracy Note 2

GM MAX9928F

MAX9928F,

TA = +25°C

VRS+ = 3.6V

TA = -40°C to +125°C

MAX9928F,

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Datasheet ID: MAX9928FEUKIT+ 647443