MAX40056U Datasheet | Maxim Integrated

Description The MAX40056 is a bidirectional current-sense amplifier with an input mon-mode range that extends from -0.1V to +65V together with protection against negative inductive kickback voltages to -5V. This CSA is well-suited for phase current monitoring of inductive loads, such as motors and solenoids, where pulse width modulation is used to control the drive voltage and current. The MAX40056 uses an improved technique to help reject mon-mode input PWM edges with slew rates up to and beyond ±500V/µs. mon mode rejection ratio (CMRR) is typically 60d B (50V, ±500V/µs input) and 140d B DC, typical. The MAX40056 has an internal +1.5V reference for use with a nominal +3.3V power supply. The reference can also be used to drive an adjoining differential ADC. The reference is used to offset the output to indicate the direction of the input sensed current. The REF pin can source current into external loads and helps to avoid the performance promises resulting from routing reference voltages across noisy PCBs. Alternatively, for higher supply voltages and higher full-scale output swings, the internal reference can be overridden by a higher voltage, external reference. The internal or external reference can be used to define the trip threshold for the integrated overcurrent parator. This can provide immediate indication of an overcurrent fault condition. The MAX40056 operates over the full -40°C to +125°C temperature range and runs from a supply voltage of +2.7V to +5.5V. It is offered in a 2.02mm x 1.4mm 8-pin wafer-level package (WLP) and 8-pin μMAX packages. Applications - PWM H-Bridge Motor In-line/In-phase/ Winding Current Sensing - Solenoid Current Sensing - Current Monitoring of Inductive Loads - Battery Stack Monitors - Automotive Benefits and Features - Fast, 2μs PWM Edge recovery (1%) from 500V/μs PWM Edges - 60d B AC CMRR Rejection at 50V, ±500V/μs PWM Edges - 140d B DC CMRR Rejection - -0.1V to +65V Input Voltage Range - -5V to +70V Protective Immunity - 300k...