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MAX4081SAUA Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX4081SAUA Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 16 page General Description The MAX4080/MAX4081 are high-side, current-sense amplifiers with an input voltage range that extends from 4.5V to 76V making them ideal for telecom, automotive, backplane, and other systems where high-voltage cur- rent monitoring is critical. The MAX4080 is designed for unidirectional current-sense applications and the MAX4081 allows bidirectional current sensing. The MAX4081 single output pin continuously monitors the transition from charge to discharge and avoids the need for a separate polarity output. The MAX4081 requires an external reference to set the zero-current output level (VSENSE = 0V). The charging current is rep- resented by an output voltage from VREF to VCC, while discharge current is given from VREF to GND. For maximum versatility, the 76V input voltage range applies independently to both supply voltage (VCC) and common-mode input voltage (VRS+). High-side current monitoring does not interfere with the ground path of the load being measured, making the MAX4080/MAX4081 particularly useful in a wide range of high-voltage systems. The combination of three gain versions (5V/V, 20V/V, 60V/V = F, T, S suffix) and a user-selectable, external sense resistor sets the full-scale current reading and its proportional output voltage. The MAX4080/MAX4081 offer a high level of integration, resulting in a simple, accurate, and compact current-sense solution. The MAX4080/MAX4081 operate from a 4.5V to 76V sin- gle supply and draw only 75µA of supply current. These devices are specified over the automotive operating temperature range (-40°C to +125°C) and are available in a space-saving 8-pin µMAX® or SO package. Applications Automotive (12V, 24V, or 42V Batteries) 48V Telecom and Backplane Current Measurement Bidirectional Motor Control Power-Management Systems Avalanche Photodiode and PIN-Diode Current Monitoring General System/Board-Level Current Sensing Precision High-Voltage Current Sources Features ♦ Wide 4.5V to 76V Input Common-Mode Range ♦ Bidirectional or Unidirectional ISENSE ♦ Low-Cost, Compact, Current-Sense Solution ♦ Three Gain Versions Available 5V/V (MAX4080F/MAX4081F) 20V/V (MAX4080T/MAX4081T) 60V/V (MAX4080S/MAX4081S) ♦ ±0.1% Full-Scale Accuracy ♦ Low 100µV Input Offset Voltage ♦ Independent Operating Supply Voltage ♦ 75µA Supply Current (MAX4080) ♦ Reference Input for Bidirectional OUT (MAX4081) ♦ Available in a Space-Saving, 8-Pin µMAX Package 76V, High-Side, Current-Sense Amplifiers with Voltage Output ________________________________________________________________ Maxim Integrated Products 1 N.C. OUT GND 1 2 8 7 RS- N.C. VCC N.C. RS+ μMAX/SO TOP VIEW 3 4 6 5 MAX4080 REF1B OUT GND 1 2 8 7 RS- REF1A VCC N.C. RS+ μMAX/SO 3 4 6 5 MAX4081 Pin Configurations Ordering Information 19-2562; Rev 1; 11/08 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. EVALUATION KIT AVAILABLE PART TEMP RANGE PIN-PACKAGE MAX4080FAUA -40 °C to +125°C 8 µMAX MAX4080FASA -40 °C to +125°C 8 SO MAX4080TAUA -40 °C to +125°C 8 µMAX MAX4080TASA -40 °C to +125°C 8 SO MAX4080SAUA -40 °C to +125°C 8 µMAX MAX4080SASA -40 °C to +125°C 8 SO MAX4081FAUA -40 °C to +125°C 8 µMAX MAX4081FASA -40 °C to +125°C 8 SO MAX4081TAUA -40 °C to +125°C 8 µMAX MAX4081TASA -40 °C to +125°C 8 SO MAX4081SAUA -40 °C to +125°C 8 µMAX MAX4081SASA -40 °C to +125°C 8 SO Selector Guide appears at end of data sheet. µMAX is a registered trademark of Maxim Integrated Products, Inc. |
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