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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX9929 Datasheet

(MAX9928 / MAX9929) Current-Sense Amplifiers

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MAX9929 pdf
19-4251; Rev 0; 8/08
-0.1V to +28V Input Range, Micropower,
Uni-/Bidirectional, Current-Sense Amplifiers
www.datasheet4u.com
General Description
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
VOS less than 0.4mV, and a gain accuracy better than
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/MAX9928T feature a current output with
transconductance ratios of 5µA/mV and 2µA/mV, respec-
tively. 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/MAX9929T have a voltage output
and integrate a 10kΩ output resistor for fixed voltage
gains of 50V/V and 20V/V, respectively.
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.
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.
Features
Wide -0.1V to +28V Common-Mode Range,
Independent of Supply Voltage
2.5V to 5.5V Operating Supply Voltage
20µA Quiescent Supply Current
0.4mV (max) Input Offset Voltage
Gain Accuracy Better than 1% (max)
SIGN Output Indicates Current Polarity
Two IOUT Transconductance Versions Available
2µA/mV (MAX9928T)
5µA/mV (MAX9928F)
Two VOUT Gain Versions Available
20V/V (MAX9929T)
50V/V (MAX9929F)
Pin Compatible with the MAX4372 in UCSP
Available in Ultra-Small 3x2 UCSP
(1mm x 1.5mm) and 8-Pin µMAX Packages
Applications
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
PKG CODE
MAX9928FAUA+
MAX9928FABT+T
MAX9928TAUA+
MAX9928TABT+T
MAX9929FAUA+
MAX9929FABT+T
Current
Current
Current
Current
Voltage
Voltage
Gm = 5µA/mV
Gm = 5µA/mV
Gm = 2µA/mV
Gm = 2µA/mV
AV = 50V/V
AV = 50V/V
8 µMAX
3x2 UCSP
8 µMAX
3x2 UCSP
8 µMAX
3x2 UCSP
+AAA
+AAC
+AAB
U8-1
R61A1+1
U8-1
R61A1+1
U8-1
R61A1+1
MAX9929TAUA+*
Voltage
AV = 20V/V
8 µMAX
MAX9929TABT+*
Voltage
AV = 20V/V
3x2 UCSP
Note: All devices are specified over the -40°C to +125°C operating temperature range.
+AAD
U8-1
R61A1+1
+Denotes a lead-free/RoHS-compliant package.
*Future product—contact factory for availability.
The MAX9928_ABT and the MAX9929_ABT 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 www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX9929 Datasheet

(MAX9928 / MAX9929) Current-Sense Amplifiers

No Preview Available !

MAX9929 pdf
-0.1V to +28V Input Range, Micropower,
Uni-/Bidirectional, Current-Sense Amplifiers
www.daAtasBheSeOt4uL.cUomTE MAXIMUM RATINGS
VCC, SIGN to GND ...................................................-0.3V to +6V
RS+, RS- to GND....................................................-0.3V to +30V
OUT to GND ...............................................-0.3V to (VCC + 0.3V)
Differential Input Voltage (VRS+ - VRS-) .............................. ±30V
OUT, SIGN Short Circuit to VCC or GND ...................Continuous
Current into Any Pin..........................................................±20mA
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 .....................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Lead Temperature (reflow) ..............................................+260°C
Bump Temperature (reflow) .............................................+260°C
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 MAX9928_, TA = -40°C to +125°C, unless other-
wise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
AMPLIFIER DC ELECTRICAL CHARACTERISTICS
Input Offset Voltage (Note 2)
VRS+ = 3.6V
VOS
VRS+ = -0.1V
Common-Mode Input Range
VCMR (Note 3)
Common-Mode Rejection Ratio
Full-Scale Sense Voltage (Note 2)
CMRR
VSENSE
2V VRS+ 28V
-0.1V VRS+
+2V
MAX992_F
MAX992_T
TA = +25°C
TA = -40°C to +125°C
TA = +25°C
TA = -40°C to +125°C
TA = +25°C
TA = -40°C to +125°C
TA = +25°C
TA = -40°C to +125°C
±0.1 ±0.4
±0.8
±0.6 ±1.0
±3.0
-0.1 +28
93 104
87
60 72
54
±50
±125
mV
V
dB
mV
Gain (Note 2)
MAX9929F
AV MAX9929T
50
V/V
20
Gain Accuracy (Notes 2, 6)
Transconductance (Note 2)
MAX9929_,
TA = +25°C
VRS+ = 3.6V
TA = -40°C to +125°C
MAX9929_,
TA = +25°C
VRS+ = -0.1V
TA = -40°C to +125°C
MAX9928F
GM
MAX9928T
±0.3
±0.3
5
2
±1.0
±2.5
±1.0
±2.8
%
µA/mV
2 _______________________________________________________________________________________


Part Number MAX9929
Description (MAX9928 / MAX9929) Current-Sense Amplifiers
Manufacturer Maxim Integrated Products
Total Page 14 Pages
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