Question

在立创商城中的LM358型号的电子元器件怎么样？

Answer 1

立创商城的元器件都是正品，但是都比较贵，质量还是有保证的，一旦买了，没质量问题是不可以退货的。

Answer 2

整体来说还不错

Answer 3

LM358是双运算放大器。内部包括有两个独立的、高增益、内部频率补偿的运算放大器，适合于电源电压范围很宽的单电源使用，也适用于双电源工作模式，在推荐的工作条件下，电源电流与电源电压无关。它的使用范围包括传感放大器、直流增益模块和其他所有可用单电源供电的使用运算放大器的场合。
LM358供应商：拍明芯城元器件商城
特性
内部频率补偿
直流电压增益高(约100dB)
单位增益频带宽(约1MHz)
电源电压范围宽：单电源(3—30V)
双电源(±1.5 一±15V)
压摆率(0.3V/us)
低功耗电流，适合于电池供电· 低输入偏流
低输入失调电压和失调电流
共模输入电压范围宽，包括接地
差模输入电压范围宽，等于电源电压范围
输出电压摆幅大(0 至Vcc-1.5V)
应用
红外线探测报警器
该报警器能探测人体发出的红外线，当人进入报警器的监视区域内，即可发出报警声，适用于家庭、办公室、仓库、实验室等比较重要场合防盗报警。
应用举例
由红外线传感器、信号放大电路、电压比较器、延时电路和音响报警电路等组成。红外线探测传感器IC1探测到前方人体辐射出的红外线信号时，由IC1
的②脚输出微弱的电信号，经三极管VT1
等组成第一级放大电路放大，再通过C2输入到运算放大器IC2中进行高增益、低噪声放大，此时由IC2①脚输出的信号已足够强。IC3作电压比较器，它的第⑤脚由R10、VD1提供基准电压，当IC2①脚输出的信号电压到达IC3的⑥脚时，两个输入端的电压进行比较，此时IC3的⑦脚由原来的高电平变为低电平。IC4
为报警延时电路，R14 和C6 组成延时电路，其时间约为1 分钟。当IC3的⑦脚变为低电平时，C6通过VD2放电，此时IC4
的②脚变为低电平，它与IC4的③脚基准电压进行比较，当它低于其基准电压时，IC4 的①脚变为高电平，VT2
导通，讯响器BL通电发出报警声。人体的红外线信号消失后，IC3的⑦脚又恢复高电平输出，此时VD2 截止。由于C6两端的电压不能突变，故通过R14向C6
缓慢充电，当C6两端的电压高于其基准电压时，IC4的①脚才变为低电平，时间约为1 分钟，即持续1分钟报警。
由VT3、R20、C8 组成开机延时电路，时间也约为1
分钟，它的设置主要是防止使用者开机后立即报警，好让使用者有足够的时间离开监视现场，同时可防止停电后又来电时产生误报。
该装置采用9-12V直流电源供电，由T 降压，全桥U整流，C10 滤波，检测电路采用IC5 78L06供电。本装置交直流两用，自动无间断转换。

Answer 4

LM358二路通用运算放大器
LM358供应商：拍明芯城元器件商城
描述
The LM358B and LM2904B devices are the next-generation versions of the industry-standard LM358 and LM2904 devices, which include two high-voltage (36-V) operational amplifiers (op amps). These devices provide outstanding value for cost-sensitive applications, with features including low offset (300 µV, typical), common-mode input range to ground, and high differential input voltage capability.
The LM358B and LM2904B devices simplify circuit design with enhanced features such as unity-gain stability, lower offset voltage of 3 mV (maximum at room temperature), and lower quiescent current of 300 µA (typical). High ESD (2 kV, HBM) and integrated EMI and RF filters enable the LM358B and LM2904B devices to be used in the most rugged, environmentally challenging applications.
The LM358B and LM2904B devices are available in micro-size packages, such as TSOT-8 and WSON, as well as industry standard packages, including SOIC, TSSOP, and VSSOP.
特性
Wide Supply Range of 3 V to 36 V (B Version)
Supply-Current of 300 µA (B Version, Typical)
Unity-Gain Bandwidth of 1.2 MHz (B Version)
Common-Mode Input Voltage Range Includes Ground, Enabling Direct Sensing Near Ground
Low Input Offset Voltage of 3 mV at 25°C (A and B Versions, Maximum)
Internal RF and EMI Filter (B Version)
On Products Compliant to MIL-PRF-38535, All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.

Answer 5

LM358是双运算放大器。内部包括有两个独立的、高增益、内部频率补偿的运算放大器，适合于电源电压范围很宽的单电源使用，也适用于双电源工作模式，在推荐的工作条件下，电源电流与电源电压无关。它的使用范围包括传感放大器、直流增益模块和其他所有可用单电源供电的使用运算放大器的场合。

特性

内部频率补偿

直流电压增益高(约100dB)

单位增益频带宽(约1MHz)

电源电压范围宽：单电源(3—30V)

双电源(±1.5 一±15V)

压摆率(0.3V/us)

低功耗电流，适合于电池供电· 低输入偏流

低输入失调电压和失调电流

共模输入电压范围宽，包括接地

差模输入电压范围宽，等于电源电压范围

输出电压摆幅大(0 至Vcc-1.5V)

Description

The LM358B and LM2904B devices are the next-generation versions of the
industry-standard LM358 and LM2904 devices, which include two high-voltage
(36-V) operational amplifiers (op amps). These devices provide outstanding value
for cost-sensitive applications, with features including low offset (300 µV,
typical), common-mode input range to ground, and high differential input voltage
capability.

The LM358B and LM2904B devices simplify circuit design with enhanced
features such as unity-gain stability, lower offset voltage of 3 mV (maximum at
room temperature), and lower quiescent current of 300 µA (typical). High ESD (2
kV, HBM) and integrated EMI and RF filters enable the LM358B and LM2904B devices
to be used in the most rugged, environmentally challenging applications.

The LM358B and LM2904B devices are available in micro-size packages, such
as TSOT-8 and WSON, as well as industry standard packages, including SOIC,
TSSOP, and VSSOP.

Features

Wide Supply Range of 3 V to 36 V (B Version)

Supply-Current of 300 µA (B Version, Typical)

Unity-Gain Bandwidth of 1.2 MHz (B Version)

Common-Mode Input Voltage Range Includes Ground, Enabling Direct Sensing
Near Ground

Low Input Offset Voltage of 3 mV at 25°C (A and B Versions, Maximum)

Internal RF and EMI Filter (B Version)

On Products Compliant to MIL-PRF-38535, All Parameters Are Tested Unless
Otherwise Noted. On All Other Products, Production Processing Does Not
Necessarily Include Testing of All Parameters.

All trademarks are the property of their respective owners.

品牌：TI

供应商：拍明芯城