The MAX49921 is a high precision, unidirectional current sense amplifier (CSA) with an operating input common-mode range from 0 V to 70 V, though the device is protected against input common-mode voltages down to –42 V and up to +80 V, providing protection against reverse-battery and high voltage spikes.
Key Features and Benefits
- Increase system reliability with precision current monitoring in solenoids, batteries, and inductive loads
- Low input offset of ±0.5 µV (typ) and low gain error of ±0.05% (typ) is suitable for high-voltage industrial applications
- Wide input common-mode voltage projection eliminates extra protection diodes and relaxes the requirements on the TVS (transient voltage suppression) diode needed for the system
Applications
- Automotive: DC Motor for power windows, sunroof, seat adjustment systems or even for ECU battery line monitoring
- Industrial Automation: Motor driver, solenoids