MAX9937 Datasheet | Maxim Integrated

Current-Sense Amplifier with Reverse-Battery Protection General Description The MAX9937 is a tiny current-sense amplifier designed for unidirectional high-side current-sense applications. This device addresses major areas of concern for various applications including load-dump protection up to +40V, reverse-battery protection, and filtering for EMI and transient performance. The MAX9937 also Features a low input offset voltage of ±1.2m V (max) at +25°C with a low temperature drift of just 1µV/°C (typ). The MAX9937 is available in a 5-pin SC70 package and is rated over the -40°C to +125°C temperature range. Applications - - Battery Current Sense - - Fuse Box Current Sense - - ECU Current Monitor Features - - Reverse Battery and Load-Dump Protection -20V to +40V - - +4V to +28V Input mon-Mode Range - - Flexible EMI Filtering - - Low VOS: ±1.2m V (max) - - Low VOS Drift : 1µV/°C (typ) - - 20µA Supply Current - - 350k Hz, 3d B Small-Signal Bandwidth Ordering Information PART TEMP RANGE PINPACKAGE MAX9937AXK+T -40°C to +125°C 5 SC70 +Denotes a lead(Pb)-free/Ro HS-pliant package. T = Tape and reel. TOP MARK +ATB Pin Configuration appears at end of data sheet. Typical Application Circuit RS+ RSENSE RS- VBAT = 4V TO 28V RRSP 499Ω RRSN 499Ω RSN...