PDF MAX34406 Data sheet ( Hoja de datos )

Número de pieza	MAX34406
Descripción	Quad Current-Sense Amplifier
Fabricantes	Maxim Integrated Products
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No Preview Available ! www.DataSheet.co.kr 19-5930; Rev 1; 1/12 EVALUATION KIT AVAILABLE MAX34406 Quad Current-Sense Amplifier with Overcurrent Threshold Comparators General Description The MAX34406 is a quad, high-side, unidirectional, cur- rent-sense amplifier that offers precision accuracy. It provides analog outputs for each of the four amplifiers that can be routed to an external ADC, and contains four overcurrent comparators with a fixed 1.0V threshold. All four comparators are logically ORed, and the result can be delayed/filtered with an external capacitor before it is fed to a latched common shutdown open-drain output pin. Applications Network Switches/Routers Base Stations Servers Smart Grid Network Systems Industrial Controls Features S Four Precision Current-Sense Amplifiers S Fixed Gains of 25V/V, 50V/V, 100V/V, and 200V/V S Less Than ±600µV of Input Offset S Less Than ±0.6% of Gain Error (T/F/H) or ±0.8% of Gain Error (W) S Wide 2.0V to 28V Common Mode Range S Analog Voltage Outputs for Each Amplifier S Independent Overcurrent Comparators with Fixed 1.0V Threshold S Low Power Consumption S -40NC to +85NC Temperature Range S Small 24-Pin TQFN (4mm x 4mm) Package Ordering Information appears at end of data sheet. Block Diagram INx+ 4 INx- 4 R1 R1 P ROUT 6V CLAMP 4 OUTx 1.0V REFERENCE GND VDD AMPLIFIER 4 AMPLIFIER 3 AMPLIFIER 2 AMPLIFIER 1 POR OR ENA MAX34406 N 4 OCx OR CLR 5µA D SHTDN CK Q N N LATCH THRESHOLD = VDD x 50% CDLY For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX34406.related �� 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. Datasheet pdf - http://www.DataSheet4U.net/ 1 page www.DataSheet.co.kr MAX34406 Quad Current-Sense Amplifier with Overcurrent Threshold Comparators Pin Configuration TOP VIEW 18 17 16 15 14 13 VDD 19 12 OC4 ENA 20 11 OC3 SHTDN 21 CDLY 22 MAX34406 10 OC2 9 OC1 N.C. 23 GND 24 + EP 8 N.C. 7 N.C. 12 3 4 56 TQFN (4mm x 4mm) PIN 1 2 3 4 5 6 7, 8, 23 9 10 11 12 13 Pin Description NAME IN1+ IN1- OUT1 OUT2 IN2- IN2+ N.C. OC1 OC2 OC3 OC4 IN3+ FUNCTION External Sense Resistor Power-Side Connection for Amplifier 1. Bias at this pin also provides the supply voltage for amplifier 1. This pin can be left open circuit if not needed. External Sense Resistor Load-Side Connection for Amplifier 1 Output Voltage from Amplifier 1 Proportional to VSENSE. This output is clamped at 6V. Output Voltage from Amplifier 2 Proportional to VSENSE. This output is clamped at 6V. External Sense Resistor Load-Side Connection for Amplifier 2 External Sense Resistor Power-Side Connection for Amplifier 2. Bias at this pin also provides the supply voltage for amplifier 2. This pin can be left open circuit if not needed. No Connection. Not internally connected. Overcurrent Threshold Comparator Associated with Amplifier 1. Open-drain output. This output transitions to high impedance during an overcurrent event. Overcurrent Threshold Comparator Associated with Amplifier 2. Open-drain output. This output transitions to high impedance during an overcurrent event. Overcurrent Threshold Comparator Associated with Amplifier 3. Open-drain output. This output transitions to high impedance during an overcurrent event. Overcurrent Threshold Comparator Associated with Amplifier 4. Open-drain output. This output transitions to high impedance during an overcurrent event. External Sense Resistor Power-Side Connection for Amplifier 3. Bias at this pin also provides the supply voltage for amplifier 3. This pin can be left open circuit if not needed. �� Maxim Integrated Products 5 Datasheet pdf - http://www.DataSheet4U.net/ 5 Page www.DataSheet.co.kr MAX34406 Quad Current-Sense Amplifier with Overcurrent Threshold Comparators Revision History REVISION NUMBER 0 1 REVISION DATE 6/11 1/12 DESCRIPTION Initial release Removed the requirement for the bleed resistor on CDLY; added the function to discharge the CDLY capacitor when all four OCx outputs are low (Block Diagram, Electrical Characteristics table tDLY specification, Pin Description, Typical Application Circuit, and Choosing the Delay Capacitor section) PAGES CHANGED — 1, 3, 6, 7, 10 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 11 © 2012 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. Datasheet pdf - http://www.DataSheet4U.net/ 11 Page

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