EVALUATION KIT AVAILABLE MAX44285 Dual-Channel, High-Precision, High-Voltage, Current-Sense Amplifier General Description Benefits and Features The MAX44285 dual-channel high-side current-sense 2.7V to 76V Input Common Mode amplifier has precision accuracy specifications of V OS Low 12V (max) Input Offset Voltage less than 12V (max) and gain error less than 0.1% Low 0.1% (max) Gain Error (max). Gain Options The MAX44285 features an input common-mode voltage G = 12.5V/V (MAX44285L) range from 2.7V to 76V with 80kHz of small-signal band- G = 20V/V (MAX44285T) width, which makes it ideal for interfacing with a SAR ADC G = 50V/V (MAX44285F) for multichannel multiplexed data acquisition systems. G = 100V/V (MAX44285H) The MAX44285 operates over the -40C to +125C 1mm x 2mm 8-Bump WLP and 8-Pin MAX temperature range. The MAX44285 is offered in 8-bump M Packages wafer-level package (WLP) and 8-pin MAX package. Applications Base Stations and Communication Equipment Power Management Systems Server Backplanes MAX is a registered trademark of Maxim Integrated Products, Inc. Industrial Control and Automation Typical Operating Circuit R ISENSE1 SENSE1 V = 2.7V TO 76V CM SYSTEM LOAD 1 RSENSE2 ISENSE2 V = 2.7V TO 76V CM SYSTEM LOAD 2 V = 2.7V TO RS1+ RS1- RS2+ RS2- DD 5.5V V OUT2 DD MAX44285 OUT1 GND Ordering Information appears at end of data sheet. 19-6910 Rev 4 4/16MAX44285 Dual-Channel, High-Precision, High-Voltage, Current-Sense Amplifier Absolute Maximum Ratings V to GND .........................................................-0.3V to +6.0V Continuous Power Dissipation (T = +70C) DD A RS+, RS- to GND ..................................................-0.3V to +80V WLP (derate 13.3mW/C above +70C) ....................1064mW RS+ to RS- MAX (derate 4.8mW/C above +70C) ...................387.8mW MAX (1s maximum duration due to package thermal Operating Temperature Range ......................... -40C to +125C dissipation .......................................................................80V Junction Temperature ......................................................+150C WLP (1s maximum duration due to package thermal Storage Temperature Range ............................ -65C to +150C dissipation .......................................................................50V Lead Temperature (soldering, 10s)(MAX only) .............+300C Continuous Input Current (Any Pin) .................................20mA Soldering Temperature (reflow) .......................................+260C 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. Package Thermal Characteristics (Note 1) WLP MAX Junction-to-Ambient Thermal Resistance ( ) ..........75C/W Junction-to-Ambient Thermal Resistance ( ) .....206.3C/W JA JA Junction-to-Case Thermal Resistance ( ) ...............42C/W JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Electrical Characteristics (V = V = +76V, V = +3.3V, V = V - V = 1mV, T = -40C to +125C, unless otherwise noted. Typical values are RS+ RS- DD SENSE RS+ RS- A at T =+25C.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS Supply Voltage V Guaranteed by PSRR 2.7 5.5 V DD T = +25C 1300 A Supply Current I A DD -40C < T < +125C 1500 A Power-Supply Rejection PSRR 2.7V V 5.5V 110 120 dB DD Ratio Input Common-Mode V Guaranteed by CMRR 2.7 76 V CM Voltage Range Input Bias Current at V RS+ I , I 65 A RS+ RS- and V (Note 3) RS- Input Offset Current I - I 1100 nA RS+ RS- (Note 3) Input Leakage Current I , I V = 0V, V = 76V 6 A RS+ RS- DD RS+ (Note 3) Common-Mode Rejection CMRR 4.5V < V < 76V 125 140 dB RS+ Ratio T = +25C 12 Input Offset Voltage A V V OS (Note 3) -40 C T +125C 25 A Input Offset Voltage Drift TCV 130 nV/C OS (Note 3) Maxim Integrated 2 www.maximintegrated.com