EVALUATION KIT AVAILABLE MAX9643 60V High-Speed Precision Current-Sense Amplifier General Description Benefits and Features The MAX9643 is a high-speed 60V precision unidirec- Supports High-Voltage Applications tional current-sense amplifier ideal for a wide variety of Wide Input V = -1.5V to +60V CM power-supply control applications. Its high signal band- Delivers High-Speed Operation width allows its use within DC-DC switching converter 15MHz Bandwidth power-supply control loops with minimal phase delay. Increases System Accuracy The IC also features 130V (max) precision input offset Precision V = 130V (max) OS voltage, allowing small sense resistors to be used in -40C to +125C Specified Temperature Range applications where efficiency is important and when wide dynamic-range current measurement is needed. High DC CMRR and AC CMRR make it easy to use in a wide variety of aggressive environments. The device is available in fixed gains of 2.5V/V and 10V/V. It is also available in a small, 8-pin TDFN (2mm x 3mm) package Ordering Information appears at end of data sheet. and is rated over the -40C to +125C temperature range. For related parts and recommended products to use with this part, refer Applications to www.maximintegrated.com/MAX9643.related. Industrial Power Supplies GSM Base Station Power Supply High-Brightness LED Control H-Bridge Motor Control Typical Operating Circuit RS+ RS- CP1 BOOST LOAD CP2 OUT POWER-SUPPLY V CC CONTROL V EE GND MAX9643 19-5889 Rev 4 4/15MAX9643 60V High-Speed Precision Current-Sense Amplifier Absolute Maximum Ratings RS+ to GND, RS- to GND (Note 1)........................-3.5V to +65V CP2 to GND .............................................. (V - 0.3V) to +0.3V EE RS+ to RS-........................................................................... 15V Short-Circuit Duration.................................................Continuous V to GND............................................................-0.3V to +40V Continuous Input Current into Any Pin..............................20mA CC V > 4.5V ESD on RS+, RS-........................................................4kV HBM CC OUT to GND......................................................-0.3V to +4.5V ESD on All Other Pins.................................................2kV HBM V to GND.........................................................+0.3V to -5V Maximum Power Dissipation EE CP1 to GND......................................................-0.3V to +4.5V TDFN-EP (derate 16.7mW/C at +70C).................1333.3mW V 4.5V Operating Temperature Range......................... -40C to +125C CC OUT to GND......................................... -0.3V to (V + 0.3V) Junction Temperature.......................................................+150C CC V to GND....................................... +0.3V to (-V + 0.3V) Lead Temperature (10s, soldering)...................................+300C EE CC CP1 to GND......................................... -0.3V to (V + 0.3V) Soldering Temperature (reflow)........................................+260C CC Note 1: Voltages below -3.5V are allowed, as long as the input current is limited to 5mA by an external resistor. 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. (Note 2) Package Thermal Characteristics TDFN Junction-to-Ambient Thermal Resistance ( )...........60C/W JA Junction-to-Case Thermal Resistance ( )................11C/W JC Note 2: 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 = 5V, V = V = 12V, T = -40C to +125C, unless otherwise noted.) (Note 3) CC RS+ RS- A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS V 5V, guaranteed by CMRR test, CC -1.5 +60 V 100mV SENSE Input Common-Mode Voltage V , V V RS+ RS- Range V < 5V, guaranteed by CMRR test, 3.5 - CC 60 V 100mV V SENSE CC T = +25C 10 130 A Input Offset Voltage (Notes 4, 5) V -40C < T < +125C 650 V OS A +10C < T < +85C 400 A -1.5V V 60V, T = +25C 120 130 Common-Mode Rejection Ratio CM A CMRR dB (Note 5) -1.5V V 60V, -40C T +125C 110 CM A CMRR vs. Frequency (Note 5) AC CMRR f = 100kHz 90 dB T = +25C 35 60 A Input Bias Current I , I A RS+ RS- -40C < T < +125C 60 A Input Bias Current, V = 0V, CC I , I 25 A RS+ RS V = V = 60V RS+ RS- T = +25C 0.02 0.65 A Input Offset Current (Note 6) I - I +10C < T < +85C 0.65 A RS+ RS- A -40C < T < +125C 0.8 A Maxim Integrated 2 www.maximintegrated.com