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LT1490AHS8#TRPBF

更新时间： 2023-01-15 00:00:00
品牌 Logo 应用领域
凌特 - Linear 放大器光电二极管
页数 文件大小 规格书
18页 228K
描述
LT1490A - Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: SO; Pins: 8; Temperature Range: -40°C to 125°C

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LT1490AHS8#TRPBF 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：SOP,
针数：8Reach Compliance Code：compliant
风险等级：1.23放大器类型：OPERATIONAL AMPLIFIER
最大平均偏置电流 (IIB)：0.02 µA标称共模抑制比：72 dB
最大输入失调电压：2700 µVJESD-30 代码：R-PDSO-G8
JESD-609代码：e3长度：4.9025 mm
湿度敏感等级：1负供电电压上限：-22 V
标称负供电电压 (Vsup)：-15 V功能数量：2
端子数量：8最高工作温度：125 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.752 mm
标称压摆率：0.07 V/us子类别：Operational Amplifier
供电电压上限：22 V标称供电电压 (Vsup)：15 V
表面贴装：YES技术：BIPOLAR
温度等级：AUTOMOTIVE端子面层：MATTE TIN
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
标称均一增益带宽：200 kHz宽度：3.899 mm

LT1490AHS8#TRPBF 数据手册

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LT1490A/LT1491A  
Dual/Quad Over-The-Top  
Micropower Rail-to-Rail  
Input and Output Op Amps  
FEATURES  
DESCRIPTION  
The LT®1490A/LT1491A are dual and quad op amps with a  
lowinputoffsetvoltageof500μVmax.TheLT1490A/LT1491A  
operate on all single and split supplies with a total voltage of  
2V to 44V, drawing only 40μA of quiescent current per ampli-  
fier. Theseamplifiersarereversesupplyprotected;theydraw  
virtually no current for reverse supply up to 18V. The input  
range of the LT1490A/LT1491A includes both supplies and  
the output swings to both supplies. Unlike most micropower  
op amps, the LT1490A/LT1491A can drive heavy loads; their  
rail-to-rail outputs drive 20mA. The LT1490A/LT1491A are  
unity-gainstableanddriveallcapacitiveloadsupto10,000pF  
when optional 0.22μF and 150Ω compensation is used.  
n
Low Input Offset Voltage: 500μV Max  
–
n
Output Swings to 10mV Max from V  
n
Rail-to-Rail Input and Output  
n
Micropower: 50μA/Amplifier Max  
Over-The-Top® Input Common Mode Range Extends  
n
–
+
44V Above V , Independent of V  
n
n
n
n
n
n
n
n
n
n
Specified on 3V, 5V and 15V Supplies  
High Output Current: 20mA  
Output Drives 10,000pF with Output Compensation  
Reverse Battery Protection to 18V  
No Supply Sequencing Problems  
High Voltage Gain: 1500V/mV  
High CMRR: 98dB  
No Phase Reversal  
Gain Bandwidth Product: 200kHz  
Tiny 3mm × 3mm × 0.8mm DFN Package  
The LT1490A/LT1491A have a unique input stage that oper-  
ates and remains high impedance when above the positive  
supply. The inputs take 44V both differential and common  
mode even when operating on a 3V supply. Built-in resistors  
protect the inputs for faults below the negative supply up to  
15V. There is no phase reversal of the output for inputs 15V  
below V– or 44V above V–, independent of V+.  
APPLICATIONS  
n
Battery- or Solar-Powered Systems  
Portable Instrumentation  
Sensor Conditioning  
TheLT1490Adualopampisavailableinthe8-pinMSOP,PDIP  
and SO packages. For space limited applications LT1490A is  
available in a 3mm × 3mm × 0.8mm, dual fine pitch leadless  
package (DFN). The quad LT1491A is available in the 14-pin  
SO, PDIP and 5mm × 3mm × 0.8mm DFN packages.  
n
Supply Current Sensing  
n
Battery Monitoring  
n
Micropower Active Filters  
n
4mA to 20mA Transmitters  
L, LT, LTC, LTM, Over-The-Top, Linear Technology and the Linear logo are registered  
trademarks of Linear Technology Corporation. All other trademarks are the property of their  
respective owners. Protected by U.S. Patents including 5825228.  
TYPICAL APPLICATION  
Battery Monitor  
R
R
S
A
0.2Ω  
2k  
Q1  
2N3904  
CHARGER  
VOLTAGE  
+
R
A´  
I
1/4 LT1491A  
BATT  
–
2k  
1/4 LT1491A  
LOGIC  
–
+
R
B
Q2  
2N3904  
2k  
LOGIC HIGH (5V) = CHARGING  
LOGIC LOW (0V) = DISCHARGING  
+
R
B´  
1/4 LT1491A  
2k  
–
LOAD  
+
+
R
G
1/4 LT1491A  
V
OUT  
10k  
V
= 12V  
BATT  
–
S1  
10k  
90.9k  
1490A TA01  
V
V
=
OUT  
OUT  
S1 = OPEN, GAIN = 1  
S1 = CLOSED, GAIN = 10  
R
= R  
A
S
B
I
=
AMPS  
BATT  
(R )(R /R )(GAIN) GAIN  
V
= 5V, 0V  
S
G
A
14901afd  
1
1234567...18

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