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ADOG Arkusz danych(PDF) 1 Page - Maxim Integrated Products |
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1 / 9 page Single/Dual/Quad, High-Side Current-Sense Amplifiers with Internal Gain ________________________________________________________________ Maxim Integrated Products 1 GND OUT RS+ VCC 15 RS- MAX4376 2 34 TOP VIEW SOT23 19-1781; Rev 3; 5/04 General Description The MAX4376/MAX4377/MAX4378 single, dual, and quad precision high-side current-sense amplifiers are available in space-saving packages. They feature buffered voltage outputs that eliminate the need for gain-setting resistors and are ideal for today’s notebook computers, cell phones, and other systems where cur- rent monitoring is critical. These precision devices are offered in three fixed-gain versions of 20, 50, and 100: GAIN SUFFIX 20 T 50 F 100 H For example, MAX4376TAUK is a single high-side amplifier with a gain of 20. High-side current monitoring is especially useful in bat- tery-powered systems since it does not interfere with the ground path of the battery charger. The input com- mon-mode range of 0 to +28V is independent of the supply voltage and ensures that the current-sense feedback remains viable even when connected to a battery pack in deep discharge. The full-scale current reading can be set by choosing the appropriate voltage gain and external-sense resis- tor. This capability offers a high level of integration and flexibility, resulting in a simple and compact current- sense solution. The MAX4376/MAX4377/MAX4378 operate over a sup- ply voltage range of +3V to +28V, draw 1mA of supply current per amplifier, and operate over the full automo- tive temperature range of -40 °C to +125°C. These devices have a wide bandwidth of 2MHz, making them suitable for use inside battery-charger control loops. The buffered outputs drive up to 2mA of output current into a ground-referenced load. The MAX4376 is available in a tiny 5-pin SOT23 pack- age. The MAX4377/MAX4378 are available in space- saving 8-pin µMAX and 14-pin TSSOP packages, respectively. Applications Features o Low-Cost, Single/Dual/Quad, High-Side Current- Sense Amplifiers o ±0.5% Typical Full-Scale Accuracy o +3V to +28V Supply Operation o Adjustable Current-Sense Capability with External Sense Resistor o Buffered Output Voltage with 2mA Drive o 1mA (typ) Supply Current o 2.0MHz Bandwidth (Gain = +20V/V) o Automotive Temperature Range (-40°C to +125°C) o Full 0 to 28V Common-Mode Range, Independent of Supply Voltage o Three Gain Versions Available +20V/V (MAX437_T) +50V/V (MAX437_F) +100V/V (MAX437_H) o Available in Space-Saving 5-Pin SOT23 (Single), 8-Pin µMAX (Dual), and 14-Pin TSSOP (Quad) Ordering Information continued at end of data sheet. Pin Configurations continued at end of data sheet. Ordering Information Notebook Computers Current-Limited Power Supplies Fuel Gauges in PC General-System/Board- Level Current Monitoring Battery Chargers Portable/Battery-Powered Systems Cell Phones Smart Battery Packages Automotive Current Detect Power Management Systems PA Bias Control Pin Configurations PART GAIN (+V/V) TEMP RANGE PIN- PACKAGE TOP MARK MAX4376TAUK-T 20 -40 °C to +125°C 5 SOT23-5 ADOG MAX4376FAUK-T 50 -40 °C to +125°C 5 SOT23-5 ADOH MAX4376HAUK-T 100 -40 °C to +125°C 5 SOT23-5 ADOI MAX4376TASA 20 -40 °C to +125°C8 SO — MAX4376FASA 50 -40 °C to +125°C8 SO — MAX4376HASA 100 -40 °C to +125°C8 SO — For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. |
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