General Description
●The MAX9918/MAX9919/MAX9920 are single-supply, high-accuracy current-sense amplifiers with a high input common-mode range that extends from -20V to +75V. These amplifiers are well suited for current moni toring of inductive loads such as motors and solenoids, where common-mode voltages can become negative due to inductive kickback, reverse-battery conditions, or transient events.
●Features
●♦ -20V to +75V Input Common-Mode Voltage Range
●♦ 400µV (max) Input Offset Voltage
●♦ 0.6% (max) Gain Accuracy Error
●♦ Uni- or Bidirectional Current Sensing
●♦ Reference Input for Bidirectional OUT
●♦ 120kHz, -3dB Bandwidth (MAX9919N)
●♦ Single-Supply Operation (4.5V to 5.5V)
●♦ 1mA Supply Current
●♦ 0.5µA (typ) Shutdown Current
●♦ Rail-to-Rail Output
●♦ -40°C to +125°C Automotive Temperature Range
●Applications
● H-Bridge Motor Current Sensing
● Solenoid Current Sensing
● Current Monitoring of Inductive Loads
● High- and Low-Side Precision Current Sensing
● 4x4 Transmission Control
● Electronic Throttle Control
● Super-Capacitor Charge/Discharge Monitoring in Hybrid Cars
● Precision High-Voltage Current Monitoring