LMP8645:42V、可配置增益、低侧/高侧、高速、电压输出电流感测放大器

The LMP8645 and the LMP8645HV devices are precision current sense amplifiers that detect small differential voltages across a sense resistor in the presence of high-input common-mode voltages.

Operating from a supply range of 2.7 V to 12 V, the LMP8645 accepts input signals with a common-mode voltage range of –2 V to 42 V, while the LMP8645HV accepts input signals with a common-mode voltage range of –2 V to 76 V. The LMP8645 and LMP8645HV have adjustable gain for applications where supply current and high common-mode voltage are the determining factors. The gain is configured with a single resistor, providing a high level of flexibility, as well as accuracy as low as 2% (maximum) including the gain setting resistor. The output is buffered to provide low output impedance. This high-side current sense amplifier is ideal for sensing and monitoring currents in DC or battery-powered systems, has excellent AC and DC specifications over temperature, and keeps errors in the current sense loop to a minimum. The LMP8645 is an ideal choice for industrial, automotive, and consumer applications, and is available in SOT-6 package.

产品特性
  • Typical Values, TA = 25°C
  • High Common-Mode Voltage Range
    • LMP8645 –2 V to 42 V
    • LMP8645HV –2 V to 76 V
  • LMP8645 –2 V to 42 V
  • LMP8645HV –2 V to 76 V
  • Supply Voltage Range 2.7 V to 12 V
  • Gain Configurable With a Single Resistor
  • Maximum Variable Gain Accuracy (With
    External Resistor) 2%
  • Transconductance 200 µA/V
  • Low Offset Voltage 1 mV
  • Input Bias 12 µA
  • PSRR 90 dB
  • CMRR 95 dB
  • Temperature Range –40°C to 125°C
  • 6-Pin SOT Package
参数parametrics
参数LMP8645LMP8640
Common Mode Voltage (Max) (V)4242
Common Mode Voltage (Min) (V)-2-2
Input Offset (+/-) (Max) (uV)1000900
Input Offset Drift (+/-) (Typ) (uV/C)41.2
Gain (V/V)Adjustable20 50 100
Gain Error (%)20.25
CMRR (Min) (dB)6060
Bandwidth (kHz)990950 450 230
Supply Voltage (Max) (V)1212
Supply Voltage (Min) (V)2.72.7
Iq (Max) (mA)0.610.722
Special FeaturesLow-side CapableLow-side Capable
RatingCatalogCatalog
Operating Temperature Range (C)-40 to 125-40 to 125
Package GroupSOTSOT
Package Size: mm2:W x L (PKG)6SOT: 8 mm2: 2.8 x 2.9(SOT)6SOT: 8 mm2: 2.8 x 2.9(SOT)
Approx. Price (US$)0.85 | 1ku0.85 | 1ku
数据表 (1)
标题类型大小 (KB)日期
LMP8645, LMP8645HV Precision High Voltage Current Sense AmplifierPDF15712015年 9月 30日
应用手册 (2)
标题类型大小 (KB)日期
High-Side DC Motor Current ProtectionPDF1142016年 12月 1日
Low-Drift, Precision, In-Line Motor Current Measurements with PWM RejectionPDF1502016年 12月 1日
用户指南 (1)
标题类型大小 (KB)日期
AN-1975 LMP8640 / LMP8645 Evaluation Board User GuidePDF5032013年 4月 26日
选择与解决方案指南 (5)
标题类型大小 (KB)日期
电源管理指南 2016 (Rev. J)PDF28952016年 6月 21日
电源管理指南 2015 (Rev. P)PDF63872015年 7月 2日
模拟信号链路产品指南 (Rev. B)PDF55182013年 9月 3日
Power Management Guide 2016多种文件格式2016年 6月 10日
Industrial Motor Drive Solution GuidePDF24152014年 10月 31日
模型 (1)
标题种类类型大小 (KB)日期
LMP8645 PSPICE ModelPSpice ModelZIP1 KB2012年 1月 16日
设计套件与评估板 (1)
培训内容型号类型
用于 LMP8645 的评估板LMP8645MKEVAL评估模块和开发板
开发工具 (1)
培训内容型号类型
基于 SPICE 的模拟仿真程序TINA-TI电路设计和仿真
订购型号
型号试生产 / 生产材料状态温度(oC)价格(美元) | Quantity封装 | 引脚器件标记封装数量 | 载体
LMP8645MK/NOPB生产ACTIVE-40 to 1250.85 | 1kuSOT (DDC)AJ6A1000 | LARGE T&R
LMP8645MKE/NOPB生产ACTIVE-40 to 1250.98 | 1kuSOT (DDC)AJ6A250 | SMALL T&R
LMP8645MKX/NOPB生产ACTIVE-40 to 1250.85 | 1kuSOT (DDC)AJ6A3000 | LARGE T&R
LMP8645, LMP8645HV Precision High Voltage Current Sense Amplifier LMP8645
High-Side DC Motor Current Protection LMP8640HV
Low-Drift, Precision, In-Line Motor Current Measurements with PWM Rejection LMP8640HV
AN-1975 LMP8640 / LMP8645 Evaluation Board User Guide LMP8640
电源管理指南 2015 (Rev. P) BQ2005
模拟信号链路产品指南 (Rev. B) BQ24392
Power Management Guide 2016 BQ2005
Industrial Motor Drive Solution Guide LMZ34002
LMP8645 PSPICE Model LMP8645
LMP8645