LMP8640-Q1:精密高电压电流感应放大器

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.

产品特性
  • 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
参数parametrics
参数LMP8640-Q1
Common Mode Voltage (Max) (V)42
Common Mode Voltage (Min) (V)-2
Input Offset (+/-) (Max) (uV)900
Input Offset Drift (+/-) (Typ) (uV/C)1.2
Gain (V/V)20
Gain Error (%)0.25
CMRR (Min) (dB)60
Bandwidth (kHz)950
Supply Voltage (Max) (V)12
Supply Voltage (Min) (V)2.7
Iq (Max) (mA)0.722
Special FeaturesLow-side Capable
RatingAutomotive
Operating Temperature Range (C)-40 to 125
Package GroupSOT
Package Size: mm2:W x L (PKG)6SOT: 8 mm2: 2.8 x 2.9(SOT)
Approx. Price (US$)1.02 | 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
设计套件与评估板 (1)
培训内容型号类型
用于 LMP8640 的评估板LMP8640HV-TEVAL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
LMP8640QMKE-T/NOPB生产ACTIVE-40 to 1251.15 | 1kuSOT (DDC)AUAA250 | SMALL T&R
LMP8640QMKX-T/NOPB生产ACTIVE-40 to 1251.02 | 1kuSOT (DDC)AUAA3000 | LARGE T&R
LMP8640/-Q1/HV Precision High Voltage Current Sense Amplifiers LMP8640-Q1
High-Side DC Motor Current Protection LMP8640HV
Low-Drift, Precision, In-Line Motor Current Measurements with PWM Rejection LMP8640HV
LMP8640-Q1