MAX9918, MAX9919, MAX9920 -20V
max9918, max9919, max9920 -20v至+75v输入范围、高精度单/双向电流检测放大器
概述
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
-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
应用/使用
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
max9918, max9919, max9920,pdf datasheet
typical operating circuit
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概述
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
-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
应用/使用
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
max9918, max9919, max9920,pdf datasheet
typical operating circuit
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中断唤醒系统demo
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内存频率是什么_内存频率高有什么好处
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