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Part Number: MAX4069
Description: The MAX4069MAX4072 low-cost, bidirectional, highside, current-sense amplifiers are ideal for monitoring battery charge ...
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MAX4069
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DataSheet
General Description
MAX4069 General Description
The MAX4069MAX4072 low-cost, bidirectional, highside, current-sense amplifiers are ideal for monitoring battery charge and discharge currents in notebooks, cell phones, and other portable equipment. They feature up to 24V input common-mode voltage range, low 100A supply current (which drops to only 10A 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 reference 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 MAX and 8-pin thin QFN packages. The MAX4069 is available in a 10-pin MAX package.
MAX4069 Maximum Ratings
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 (VCC or 15V)........................................Continuous
REFOUT Short Circuit to VCC or GND............................Continuous
Current into Any Pin ..........................................................±20mA
Continuous Power Dissipation (TA = +70°C)
8-Pin MAX (derate 4.5 mW/°C above +70°C) ..................362mW
8-Pin Thin QFN (derate 24.4mW/°C above +70°C) .........1951mW
10-Pin MAX (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
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 (VCC or 15V)........................................Continuous
REFOUT Short Circuit to VCC or GND............................Continuous
Current into Any Pin ..........................................................±20mA
Continuous Power Dissipation (TA = +70°C)
8-Pin MAX (derate 4.5 mW/°C above +70°C) ..................362mW
8-Pin Thin QFN (derate 24.4mW/°C above +70°C) .........1951mW
10-Pin MAX (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 Features
Bidirectional, Compact, Current-Sense Solution
Total Output Error Less than 1.5%
Selectable Gain of 50V/V or 100V/V
Wide 1.35V to 24V Common-Mode Range
Independent of Supply Voltage
2.7V to 24V Single-Supply Operation
Internal Precision Reference
Adjustable (MAX4069)
2.50V (MAX4070)
1.50V (MAX4071)
Low 100A Supply Current
10A Supply Current in Shutdown
Available in Space-Saving Packages
8-Pin Thin QFN (MAX4070/MAX4071/MAX4072)
8-Pin MAX (MAX4070/MAX4071MAX4072)
10-Pin MAX (MAX4069)
Total Output Error Less than 1.5%
Selectable Gain of 50V/V or 100V/V
Wide 1.35V to 24V Common-Mode Range
Independent of Supply Voltage
2.7V to 24V Single-Supply Operation
Internal Precision Reference
Adjustable (MAX4069)
2.50V (MAX4070)
1.50V (MAX4071)
Low 100A Supply Current
10A Supply Current in Shutdown
Available in Space-Saving Packages
8-Pin Thin QFN (MAX4070/MAX4071/MAX4072)
8-Pin MAX (MAX4070/MAX4071MAX4072)
10-Pin MAX (MAX4069)
MAX4069 Typical Application
Notebook Fuel Gauging
Smart-Battery Packs/Chargers
Motor Control
Power-Management Systems
Cell-Phone Battery-Current Monitoring
Smart-Battery Packs/Chargers
Motor Control
Power-Management Systems
Cell-Phone Battery-Current Monitoring
MAX4069 Connection Diagram
MAX4069
PDF/DataSheet Download
- Datasheet: MAX4069
- File Size: 483751 KB
- Manufacturer: Maxim
- Click here to Download
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