The LMP8640, LMP8640-Q1 and the LMP8640HV are precision current sense amplifiers that detect small differential voltages across a sense resistor in the presence of high input common mode voltages with a supply voltage range from 2.7 V to 12 V.

The LMP8640 and LMP8640-Q1 accept input signals with common mode voltage range from –2 V to 42 V, while the LMP8640HV accepts input signal with common mode voltage range from –2 V to 76 V. The LMP8640 and LMP8640HV have fixed gain for applications that demand accuracy over temperature. The LMP8640 and LMP8640HV come out with three different fixed gains 20 V/V, 50 V/V, 100 V/V ensuring a gain accuracy as low as 0.25%. The output is buffered in order to provide low output impedance. This high side current sense amplifier is ideal for sensing and monitoring currents in DC or battery powered systems, excellent AC and DC specifications over temperature, and keeps errors in the current sense loop to a minimum. The LMP8640 and LMP8640HV are ideal choice for industrial and consumer applications, while the LMP8640-Q1 is an AEC-Q100 grade 1 qualified version of the LMP8640 for automotive applications. The LMP8640-x is available in SOT-23-6 package.

  • Typical Values, TA = 25°C
  • High Common-Mode Voltage Range
    • LMP8640: –2 V to 42 V
    • LMP8640-Q1: –2 V to 42 V, AEC-Q100
    • LMP8640HV: –2 V to 76 V
  • LMP8640: –2 V to 42 V
  • LMP8640-Q1: –2 V to 42 V, AEC-Q100
  • LMP8640HV: –2 V to 76 V
  • Supply Voltage Range: 2.7 V to 12 V
  • Gain Options: 20 V/V; 50 V/V; 100 V/V
  • Max Gain Error: 0.25%
  • Low Offset Voltage: 900 µV
  • Input Bias Current: 13 µA
  • PSRR: 85 dB
  • CMRR (2.1V to 42V): 103 dB
  • Temperature Range: –40°C to 125°C
  • 6-Pin Thin SOT-23 Package
Common Mode Voltage (Max) (V)4242
Common Mode Voltage (Min) (V)-2-2
Input Offset (+/-) (Max) (uV)9001000
Input Offset Drift (+/-) (Typ) (uV/C)1.24
Gain (V/V)20 50 100Adjustable
Gain Error (%)0.252
CMRR (Min) (dB)6060
Bandwidth (kHz)950 450 230990
Supply Voltage (Max) (V)1212
Supply Voltage (Min) (V)2.72.7
Iq (Max) (mA)0.7220.61
Special FeaturesLow-side CapableLow-side Capable
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
LMP8640/-Q1/HV Precision High Voltage Current Sense AmplifiersPDF13932014年 11月 12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 (7)
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
Current Sense AmplifiersPDF11252016年 4月 11日
Motor Drive and Control SolutionsPDF64932016年 11月 16日
Industrial Motor Drive Solution GuidePDF24152014年 10月 31日
更多文献资料 (2)
标题类型大小 (KB)日期
分流监控器 (Rev. A)PDF16132014年 11月 17日
Current Shunt Monitors BrochurePDF6352013年 3月 15日
设计套件与评估板 (3)
用于 LMP8640 的评估板LMP8640HV-TEVAL评估模块和开发板
用于 LMP8640 的评估板LMP8640HV-HEVAL评估模块和开发板
用于 LMP8640 的评估板LMP8640HV-FEVAL评估模块和开发板
开发工具 (1)
基于 SPICE 的模拟仿真程序TINA-TI电路设计和仿真
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
LMP8640MK-F/NOPB生产ACTIVE-40 to 1250.85 | 1kuSOT (DDC)AC6A1000 | LARGE T&R
LMP8640MK-H/NOPB生产ACTIVE-40 to 1250.85 | 1kuSOT (DDC)AE6A1000 | LARGE T&R
LMP8640MK-T/NOPB生产ACTIVE-40 to 1250.85 | 1kuSOT (DDC)AA6A1000 | LARGE T&R
LMP8640MKE-F/NOPB生产ACTIVE-40 to 1250.98 | 1kuSOT (DDC)AC6A250 | SMALL T&R
LMP8640MKE-H/NOPB生产ACTIVE-40 to 1250.98 | 1kuSOT (DDC)AE6A250 | SMALL T&R
LMP8640MKE-T/NOPB生产ACTIVE-40 to 1250.98 | 1kuSOT (DDC)AA6A250 | SMALL T&R
LMP8640MKX-F/NOPB生产ACTIVE-40 to 1250.85 | 1kuSOT (DDC)AC6A3000 | LARGE T&R
LMP8640MKX-H/NOPB生产ACTIVE-40 to 1250.85 | 1kuSOT (DDC)AE6A3000 | LARGE T&R
LMP8640MKX-T/NOPB生产ACTIVE-40 to 1250.85 | 1kuSOT (DDC)AA6A3000 | LARGE T&R
LMP8640/-Q1/HV Precision High Voltage Current Sense Amplifiers LMP8640
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
Current Shunt Monitors (Rev. A) AMC1200
Motor Drive and Control Solutions LMZ34002
Industrial Motor Drive Solution Guide LMZ34002
分流监控器 (Rev. A) ISO1541
Current Shunt Monitors Brochure AMC1200