MAX49925XATB+T

MAX49925XATB+T is a bidirectional, wide positive and negative sensing range current-sense amplifier with fast PWM rejection. This CSA has an extended input protection range of -42V to +80V against reverse-battery and high-voltage spikes. The wider input protection range also helps relax TVS requirements, leading to lower BOM cost and reduced component size. It is well-suited for phase-current monitoring of inductive loads, such as motors and solenoids, where pulse-width modulation (PWM) is used to control the drive voltage and current. Typical applications include PWM H-bridge motor in-line/in-phase/winding current sensing, solenoid current sensing, current monitoring of inductive loads, battery stack monitors and high-power DC motors.

• Rail-to-rail output
• Supply voltage range from 2.7 to 5.5V guaranteed by PSRR
• Supply current is 5mA typical
• Input offset drift is 0.05µV/°C typical
• 110dB typ power supply rejection ratio (2.7V less than or equal to VDD less than or equal to 5.5V)
• Common-mode rejection ratio is 140dB typ at -40V less than or equal to VCM less than or equal to 76V
• Gain error is 0.05% typ at -40°C less than or equal to TA less than or equal to +125°C
• Voltage noise density is 150nV/√Hz typ at 10kHz
• 10 TDFN package
• Temperature range from -40°C to +125°C