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预发布版数据资料 (PDF, 132kB) 英文 下载 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 monitoring 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. The MAX9918/MAX9920 feature adjustable gain set by an external resistive-divider network. The MAX9919 features fixed gains of 45V/V (MAX9919F) and 90V/V (MAX9919N). The MAX9918/MAX9919/MAX9920 operate as unidirectional amplifiers when VREFIN = GND and as bidirectional amplifiers when VREFIN = VCC/2. The MAX9920 attenuates the input signal by a factor of 4 at the input level shifting stage allowing the device to sense voltages up to 200mV (unidirectional operation) or ±100mV (bidirectional operation). The MAX9918/MAX9919/MAX9920 operate with a single 5V supply voltage are fully specified over the -40°C to +125°C automotive temperature range, and are available in an 8-pin SOIC package.

关键特性		应用/使用
-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		4x4传输控制 电感负载电流监测 电子节气门控制 H桥接电机电流检测 高边、低边高精度电流检测 精密的高压电流监测 螺线管电流检测 混合动力车中超级电容的充电/放电监测

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