MAX9929FABS+TG45 Maxim Integrated, MAX9929FABS+TG45 Datasheet

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MAX9929FABS+TG45

Manufacturer Part Number
MAX9929FABS+TG45
Description
Current Sense Amplifiers
Manufacturer
Maxim Integrated
Series
MAX9928F, MAX9929Fr
Datasheet
1.MAX9929FABSTG45.pdf (14 pages)

Specifications of MAX9929FABS+TG45

Rohs
yes
The MAX9928/MAX9929 low-cost, uni-/bidirectional,
high-side, current-sense amplifiers are ideal for moni-
toring battery charge and discharge currents in note-
books, cell phones, and other portable equipment.
These devices feature a wide -0.1V to +28V input com-
mon-mode voltage range, low 20µA supply current with
V
1.0%. The input common-mode range is independent
of the supply voltage, ensuring that the current-sense
information remains accurate even when the measure-
ment rail is shorted to ground.
The MAX9928F features a current output with a transcon-
ductance 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 mea-
suring 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 µMAX
packages. The UCSP package is bump-to-bump com-
patible with the MAX4372_EBT.
Note: All devices are specified over the -40°C to +125°C operating temperature range.
+ Denotes a lead-free/RoHS-compliant package.
T = Tape and reel.
19-4251; Rev 3; 4/12
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.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX9928FAUA+
MAX9928FABT+T
MAX9929FAUA+
MAX9929FABT+T
OS
less than 0.4mV, and a gain accuracy better than
PART
Uni-/Bidirectional, Current-Sense Amplifiers
________________________________________________________________ Maxim Integrated Products
-0.1V to +28V Input Range, Micropower,
General Description
OUTPUT TYPE
Voltage
Voltage
Current
Current
G
G
A
A
m
m
®
V
V
= 5µA/mV
= 5µA/mV
GAIN
= 50V/V
= 50V/V
o Wide -0.1V to +28V Common-Mode Range,
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
o Pin Compatible with the MAX4372 in UCSP
o Available in Ultra-Small, 3x2 UCSP
Independent of Supply Voltage
(1mm x 1.5mm) and 8-Pin µMAX Packages
5µA/mV (MAX9928F)
50V/V (MAX9929F)
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
PIN-PACKAGE
8 µMAX
3x2 UCSP
8 µMAX
3x2 UCSP
Ordering Information
Applications
TOP MARK
Features
+AAF
+ADI
—
—
1

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MAX9929FABS+TG45 Summary of contents

Page 1

... Note: All devices are specified over the -40°C to +125°C operating temperature range. + Denotes a lead-free/RoHS-compliant package Tape and reel. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. o Wide -0.1V to +28V Common-Mode Range, Independent of Supply Voltage o 2 ...

Page 2

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers ABSOLUTE MAXIMUM RATINGS V , SIGN to GND ...................................................-0.3V to +6V CC RS+, RS- to GND....................................................-0.3V to +30V OUT to GND ...............................................-0. Differential Input Voltage ( ...

Page 3

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers ELECTRICAL CHARACTERISTICS (continued -0.1V to +28V 3.3V, V RS+ CC SENSE wise noted. Typical values are +25°C.) (Note 1) A PARAMETER SYMBOL Output Resistance ...

Page 4

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers ELECTRICAL CHARACTERISTICS (continued -0.1V to +28V 3.3V, V RS+ CC SENSE wise noted. Typical values are +25°C.) (Note 1) A PARAMETER SYMBOL AC ELECTRICAL ...

Page 5

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers (V = 3.3V 12V +25°C, unless otherwise noted HISTOGRAM 50V ...

Page 6

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers (V = 3.3V 12V +25°C, unless otherwise noted.) CC RS+ A MAX9928F I vs. V OUT SENSE 2500 OUT T = -40°C A 2000 ...

Page 7

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers (V = 3.3V 12V +25°C, unless otherwise noted.) CC RS+ A PSRR vs. FREQUENCY 20 0 -20 -40 -60 -80 -100 -120 0 100 1k ...

Page 8

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers PIN BUMP NAME µMAX UCSP 1 B3 RS- Negative Current-Sense Input. Load-side connection for the external sense resistor. SIGN Output. Indicates polarity SIGN SIGN = H indicates ...

Page 9

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers V CC 2. -0.1V TO +28V (V ) BATT RS LOAD/CHARGER *INTERNAL 10kΩ RESISTOR FOR MAX9929_ ONLY. Figure 1. Functional Diagram -3.0 -1.8 ...

Page 10

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers Voltage Output (MAX9929F) The output voltage equation for the MAX9929_ is given below OUT SENSE LOAD where V = the desired full-scale output voltage, OUT I ...

Page 11

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers TOP VIEW + RS- 1 SIGN 2 MAX9928F RS+ 3 MAX9929F N.C. 4 μMAX Typical Operating Circuit R SENSE V IN -0.1V TO +28V LOAD RS+ RS- 2.5V TO MAX9928F V ...

Page 12

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may ...

Page 13

Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may ...

Page 14

... Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2012 Maxim Integrated Products ...

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