MAX4378:单/双/四路、高边电流检测放大器,内部设定增益

业内首款SOT23高边电流检测放大器,带缓冲输出

The MAX4376/MAX4377/MAX4378 single, dual, and quad precision high-side current-sense amplifiers are available in space-saving packages. They feature buffered voltage outputs that eliminate the need for gain-setting resistors and are ideal for today's notebook computers, cell phones, and other systems where current monitoring is critical. These precision devices are offered in three fixed-gain versions of 20, 50, and 100: GAIN SUFFIX 20 T 50 F 100 H For example, MAX4376TAUK is a single high-side amplifier with a gain of 20. High-side current monitoring is especially useful in battery-powered systems since it does not interfere with the ground path of the battery charger. The input common-mode range of 0 to +28V is independent of the supply voltage and ensures that the current-sense feedback remains viable even when connected to a battery pack in deep discharge. The full-scale current reading can be set by choosing the appropriate voltage gain and external-sense resistor. This capability offers a high level of integration and flexibility, resulting in a simple and compact current-sense solution. The MAX4376/MAX4377/MAX4378 operate over a supply voltage range of +3V to +28V, draw 1mA of supply current per amplifier, and operate over the full automotive temperature range of -40°C to +125°C. These devices have a wide bandwidth of 2MHz, making them suitable for use inside battery-charger control loops. The buffered outputs drive up to 2mA of output current into a ground-referenced load. The MAX4376 is available in a tiny 5-pin SOT23 package. The MAX4377/MAX4378 are available in space-saving 8-pin µMAX® and 14-pin TSSOP packages, respectively.

关键特性
  • Low-Cost Single/Dual/Quad High-Side Current-Sense Amplifiers
  • ±0.5% Typical Full-Scale Accuracy
  • +3V to +28V Supply Operation
  • Adjustable Current-Sense Capability with External Sense Resistor
  • Buffered Output Voltage with 2mA Drive
  • 1mA (typ) Supply Current
  • 2.0MHz Bandwidth (Gain = +20V/V)
  • Automotive Temperature Range (-40°C to +125°C)
  • High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage
  • Three Gain Versions Available
    • +20V/V (MAX437_T)
    • +50V/V (MAX437_F)
    • +100V/V (MAX437_H)
  • Available in Space-Saving 5-pin SOT23 (Single), 8-pin µMAX (Dual), and 14-pin TSSOP (Quad)
MAX4376、MAX4377、MAX4378:引脚配置
MAX4376、MAX4377、MAX4378:引脚配置
应用
  • 汽车电流检测
  • 电池充电器
  • 蜂窝电话
  • 限流电源
  • PC电量计
  • 通用系统/板级电流监视
  • 笔记本电脑
  • PA偏置控制
  • 便携式/电池供电系统
  • 电源管理系统
数据手册DataSheet
语言下载文件备注
英文MAX4376-MAX4378.pdfRev 7; 11/2012
关键参数
Part NumberOutput FormatCMVR
(V)
CMVR
(V)
VCC
(V)
VCC
(V)
ICC
(µA)
Bi-Dir. Curr. SenseVSENSE_FS
(mV)
GainGain Accuracy @25°C
(%)
BW
(kHz)
Comp-
arators
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtyprecomm.max@ -3dBSee Notes
MAX4376Voltage0283281000No150
  • 20 V/V
  • 50 V/V
  • 100 V/V
2.5
  • 1200
  • 1700
  • 2000
0-40 to +125
  • SOIC(N)/8
  • SOT/5
$0.92 @1k
MAX4377
  • µMAX/8
  • SOIC(N)/8
$1.34 @1k
MAX4378
  • SOIC(N)/14
  • TSSOP/14
$1.46 @1k
质量和环境数据
相关产品
  • MAX4173T:低成本、SOT23封装、电压输出、高边电流检测放大器
  • MAX4173H:低成本、SOT23封装、电压输出、高边电流检测放大器
  • MAX4173F:低成本、SOT23封装、电压输出、高边电流检测放大器
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX4378FASD停止供货MAX4378FASD+SOIC(N),;14引脚;54.2mm²-40°C至+125°CRoHS/无铅:否
MAX4378FASD+生产中SOIC(N),;14引脚;54.2mm²-40°C至+125°CRoHS/无铅:无铅
MAX4378FASD+T生产中SOIC(N),;14引脚;54.2mm²-40°C至+125°CRoHS/无铅:无铅
MAX4378FASD-T停止供货MAX4378FASD+TN.SO;14引脚-40°C至+125°C参考数据资料
MAX4378FAUD停止供货MAX4378FAUD+TSSOP,;14引脚;33.4mm²-40°C至+125°CRoHS/无铅:否
MAX4378FAUD+生产中TSSOP,;14引脚;33.4mm²-40°C至+125°CRoHS/无铅:无铅
MAX4378FAUD+T生产中TSSOP,;14引脚;33.4mm²-40°C至+125°CRoHS/无铅:无铅
MAX4378FAUD-T停止供货MAX4378FAUD+TTSSOP,;14引脚;33.4mm²-40°C至+125°CRoHS/无铅:否
MAX4378HASD停止供货MAX4378HASD+SOIC(N),;14引脚;54.2mm²-40°C至+125°CRoHS/无铅:否
MAX4378HASD+生产中SOIC(N),;14引脚;54.2mm²-40°C至+125°CRoHS/无铅:无铅
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX4378HASD+T生产中SOIC(N),;14引脚;54.2mm²-40°C至+125°CRoHS/无铅:无铅
MAX4378HASD-T停止供货MAX4378HASD+TN.SO;14引脚-40°C至+125°C参考数据资料
MAX4378HAUD停止供货MAX4378HAUD+TSSOP,;14引脚;33.4mm²-40°C至+125°CRoHS/无铅:否
MAX4378HAUD+生产中TSSOP,;14引脚;33.4mm²-40°C至+125°CRoHS/无铅:无铅
MAX4378HAUD+T生产中TSSOP,;14引脚;33.4mm²-40°C至+125°CRoHS/无铅:无铅
MAX4378HAUD-T停止供货MAX4378HAUD+TTSSOP;14引脚-40°C至+125°C参考数据资料
MAX4378TASD停止供货MAX4378TASD+SOIC(N),;14引脚;54.2mm²-40°C至+125°CRoHS/无铅:否
MAX4378TASD+生产中SOIC(N),;14引脚;54.2mm²-40°C至+125°CRoHS/无铅:无铅
MAX4378TASD+T生产中SOIC(N),;14引脚;54.2mm²-40°C至+125°CRoHS/无铅:无铅
MAX4378TASD-T停止供货MAX4378TASD+TSOIC(N),;14引脚;54.2mm²-40°C至+125°CRoHS/无铅:否
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX4378TAUD停止供货MAX4378TAUD+TSSOP,;14引脚;33.4mm²-40°C至+125°CRoHS/无铅:否
MAX4378TAUD+生产中TSSOP,;14引脚;33.4mm²-40°C至+125°CRoHS/无铅:无铅
MAX4378TAUD+T生产中TSSOP,;14引脚;33.4mm²-40°C至+125°CRoHS/无铅:无铅
MAX4378TAUD-T停止供货MAX4378TAUD+TTSSOP,;14引脚;33.4mm²-40°C至+125°CRoHS/无铅:否
MAX4376-MAX4378.pdf MAX4378
MAX4378.pdf MAX4378
MAX4376-MAX4378.pdf MAX4378