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MAX4071AUAMAXIMN/a5avaiBidirectional / High-Side / Current-Sense Amplifiers with Reference
MAX4072AUAMAXIMN/a6136avaiBidirectional / High-Side / Current-Sense Amplifiers with Reference


MAX4072AUA ,Bidirectional / High-Side / Current-Sense Amplifiers with ReferenceMAX4069–MAX407219-2423; Rev 2; 1/03Bidirectional, High-Side, Current-SenseAmplifiers with Reference
MAX4072AUA+ ,Bidirectional, High-Side, Current-Sense Amplifiers with ReferenceFeaturesThe MAX4069–MAX4072 low-cost, bidirectional, high-♦ Bidirectional, Compact, Current-Sense S ..
MAX4073FAUT ,Low-Cost, SC70, Voltage-Output, High-Side Current-Sense AmplifierFeaturesThe MAX4073 low-cost, high-side current-sense ampli-♦ Low-Cost, Compact, Current-Sense Solu ..
MAX4073FAUT+T ,Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifierfeatures a voltage output that eliminates the need♦ Three Gain Versions Availablefor gain-setting r ..
MAX4073FAUT-T ,Low-Cost, SC70, Voltage-Output, High-Side Current-Sense AmplifierApplications0.1µ FCell PhonesMAX4073T/F/HNotebook ComputersPortable/Battery-Powered SystemsA/D LOAD ..
MAX4073FAXK ,Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier MAX4073T/F/HLow-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier
MAX766CSA ,5V/-12V/-15V or Adjustable / High-Efficiency / Low IQ DC-DC InvertersMAX764/MAX765/MAX76619-0176; Rev 0; 6/94-5V/-12V/-15V or Adjustable,High-Efficiency, Low I DC-DC In ..
MAX766CSA+ ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low-IQ DC-DC InvertersGeneral Description ________
MAX766EPA ,5V/-12V/-15V or Adjustable / High-Efficiency / Low IQ DC-DC InvertersApplications A**Contact factory for availability and processing to MIL-STD-883.__________________Pi ..
MAX766EPA ,5V/-12V/-15V or Adjustable / High-Efficiency / Low IQ DC-DC InvertersApplicationsMAX765C/D 0°C to +70°C Dice*LCD-Bias GeneratorsMAX765EPA -40°C to +85°C 8 Plastic DIPPo ..
MAX766ESA ,5V/-12V/-15V or Adjustable / High-Efficiency / Low IQ DC-DC Invertersapplications. For increased output driveMAX764ESA -40°C to +85°C 8 SOcapability or higher output vo ..
MAX766ESA+ ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low-IQ DC-DC InvertersApplications A**Contact factory for availability and processing to MIL-STD-883.__________________Pi ..


MAX4071AUA-MAX4072AUA
Bidirectional / High-Side / Current-Sense Amplifiers with Reference
General Description
The MAX4069–MAX4072 low-cost, bidirectional, high-
side, current-sense amplifiers are ideal for monitoring
battery charge and discharge currents in notebooks,
cell phones, and other portable equipment. They fea-
ture up to 24V input common-mode voltage range, low
100µA supply current (which drops to only 10µA in
shutdown), and a total output error of less than 1.5%.
The wide 1.35V to 24V input common-mode range is
independent of the supply voltage, ensuring that the
current-sense feedback remains accurate even when
connected to a battery pack in deep discharge.
To achieve maximum flexibility, an external current-sense
resistor is used along with a Gain Select pin to choose
either 50V/V or 100V/V. A single output pin continuously
monitors the transition from charge to discharge and
avoids the need for a separate polarity output. The
MAX4070 contains an internal 2.5V reference. The
charging current is represented by an output voltage
from 2.5V to VCC, while discharge current is given from
2.5V to GND. The MAX4071 is similar, but with a refer-
ence voltage of 1.5V. The MAX4069 has an adjustable
reference voltage, set by two external resistors. The
MAX4072 has an input for an external reference.
The MAX4069/MAX4071/MAX4072 operate from a 2.7V to
24V single supply. The MAX4070 operates from a 3.6V to
24V single supply. All devices are specified over the
automotive operating temperature range, -40°C to
+125°C. The MAX4070/MAX4071/MAX4072 are available
in 8-pin µMAX and 8-pin thin QFN packages. The
MAX4069 is available in a 10-pin µMAX package.
Applications

Notebook Fuel Gauging
Smart-Battery Packs/Chargers
Motor Control
Power-Management Systems
Cell-Phone Battery-Current Monitoring
Features
Bidirectional, Compact, Current-Sense SolutionTotal Output Error Less than 1.5%Selectable Gain of 50V/V or 100V/VWide 1.35V to 24V Common-Mode Range
Independent of Supply Voltage
2.7V to 24V Single-Supply OperationInternal Precision Reference
Adjustable (MAX4069)
2.50V (MAX4070)
1.50V (MAX4071)
Low 100µA Supply Current10µA Supply Current in ShutdownAvailable in Space-Saving Packages
8-Pin Thin QFN (MAX4070/MAX4071/MAX4072)
8-Pin µMAX (MAX4070/MAX4071MAX4072)
10-Pin µMAX (MAX4069)
MAX4069–MAX4072
Bidirectional, High-Side, Current-Sense
Amplifiers with Reference
Ordering Informationypical Operating Circuit

19-2423; Rev 2; 1/03
Pin Configurations appear at end of data sheet.
Selector Guide

*EP = Exposed paddle.
MAX4069–MAX4072
Bidirectional, High-Side, Current-Sense
Amplifiers with Reference
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VRS+ = VRS- = VCC= 2.7V to 24V, VSENSE= VRS+ - VRS- = 0V, IREFOUT= 0, VSHDN= VCC, VGSEL= GND, VREFIN= 2.5V (MAX4072),
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.
VCC, RS+, RS- to GND...........................................-0.3V to +26V
OUT to GND....................-0.3V to Lesser of (VCC+ 0.3V) or 15V
Differential Input Voltage (VRS+- VRS-)..............................±0.3V
GSEL, SHDN, REFOUT, REFIN
and ADJ to GND.....................................-0.3V to (VCC+ 0.3V)
OUT Short-Circuit Duration to GND
or to Lesser of (VCCor 15V)...................................Continuous
REFOUT Short Circuit to VCCor GND........................Continuous
Current into Any Pin..........................................................±20mA
Continuous Power Dissipation (TA= +70°C)
8-Pin µMAX (derate 4.5 mW/°C above +70°C)............362mW
8-Pin Thin QFN (derate 24.4mW/°C above +70°C)...1951mW
10-Pin µMAX (derate 5.6 mW/°C above +70°C).......444.4mW
Operating Temperature Range.........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX4069–MAX4072
Bidirectional, High-Side, Current-Sense
Amplifiers with Reference
ELECTRICAL CHARACTERISTICS (continued)

(VRS+ = VRS- = VCC= 2.7V to 24V, VSENSE= VRS+ - VRS- = 0V, IREFOUT= 0, VSHDN= VCC, VGSEL= GND, VREFIN= 2.5V (MAX4072),= TMINto TMAX,unless otherwise noted. Typical values are at TA= +25°C and at VCC= VRS+ = 12V.) (Notes 1, 2)
MAX4069–MAX4072
Bidirectional, High-Side, Current-Sense
Amplifiers with Reference
ELECTRICAL CHARACTERISTICS (continued)

(VRS+ = VRS- = VCC= 2.7V to 24V, VSENSE= VRS+ - VRS- = 0V, IREFOUT= 0, VSHDN= VCC, VGSEL= GND, VREFIN= 2.5V (MAX4072),
MAX4069–MAX4072
Bidirectional, High-Side, Current-Sense
Amplifiers with Reference
ELECTRICAL CHARACTERISTICS (continued)

(VRS+ = VRS- = VCC= 2.7V to 24V, VSENSE= VRS+ - VRS- = 0V, IREFOUT= 0, VSHDN= VCC, VGSEL= GND, VREFIN= 2.5V (MAX4072),
Note 1:
All devices are 100% tested at TA= +25°C. Limits over temperature are guaranteed by design.
Note 2:
R1 = 215kΩ, R2 = 210kΩfor the MAX4069 only (see Functional Diagram). This sets REFOUT to 2.49V nominal.
Note 3:
Guaranteed by the PSRR test.
Note 4:
The REFOUT voltage for the MAX4069 should be set such that it does not exceed VCC- 1.1V. Similarly, the maximum REFIN
voltage for the MAX4072 should also be less than VCC- 1.1V.
Note 5:
Input-Referred Offset Voltage is defined as the voltage difference between OUT and REFOUT, divided by the selected gain
of either 50 or 100, when VSENSE= VRS+- VRS-= 0V.
Note 6:
The negative full-scale sense voltage is limited by the voltage range of OUT from VREFOUTto GND.
Note 7:
Total OUT Voltage Error is the sum of offset voltage and gain errors. The output voltage is measured relative to the reference
(REFOUT or REFIN).
MAX4069–MAX4072
Bidirectional, High-Side, Current-Sense
Amplifiers with Reference
Typical Operating Characteristics

(VCC = VRS+= 12V, VSENSE= 50mV for gain of 100V/V and 75mV for gain of 50V/V, TA = +25°C, unless otherwise noted.)
MAX4069–MAX4072
Bidirectional, High-Side, Current-Sense
Amplifiers with Reference
Typical Operating Characteristics (continued)

(VCC = VRS+= 12V, VSENSE= 50mV for gain of 100V/V and 75mV for gain of 50V/V, TA = +25°C, unless otherwise noted.)
MAX4069–MAX4072
Bidirectional, High-Side, Current-Sense
Amplifiers with Reference
Typical Operating Characteristics (continued)

(VCC = VRS+= 12V, VSENSE= 50mV for gain of 100V/V and 75mV for gain of 50V/V, TA = +25°C, unless otherwise noted.)
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