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LT1491 PDF预览

LT1491

更新时间: 2024-01-07 00:16:06
品牌 Logo 应用领域
凌特 - Linear 运算放大器
页数 文件大小 规格书
12页 315K
描述
Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps

LT1491 技术参数

是否Rohs认证: 符合生命周期:Transferred
零件包装代码:SOIC包装说明:SOP, SOP14,.25
针数:14Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.33.00.01
风险等级:5.06放大器类型:OPERATIONAL AMPLIFIER
架构:VOLTAGE-FEEDBACK最大平均偏置电流 (IIB):0.008 µA
标称共模抑制比:98 dB频率补偿:YES
最大输入失调电压:1950 µVJESD-30 代码:R-PDSO-G14
JESD-609代码:e3长度:8.65 mm
低-失调:NO微功率:YES
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:4
端子数量:14最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP14,.25
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
包装方法:TAPE AND REEL峰值回流温度(摄氏度):260
电源:3/5/+-5 V认证状态:Not Qualified
座面最大高度:1.75 mm最小摆率:0.03 V/us
标称压摆率:0.07 V/us子类别:Operational Amplifier
最大压摆率:0.34 mA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:INDUSTRIAL
端子面层:Matte Tin (Sn)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
最小电压增益:50000宽度:3.9 mm
Base Number Matches:1

LT1491 数据手册

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LT1490/LT1491  
Dual and Quad  
Micropower Rail-to-Rail  
Input and Output Op Amps  
U
FEATURES  
DESCRIPTION  
The dual LT®1490 and quad LT1491 op amps operate on all  
single and split supplies with a total voltage of 2V to 44V  
drawing only 40µA of quiescent current per amplifier. These  
amplifiersarereversesupplyprotected;theydrawnocurrent  
for reverse supply up to 18V. The input range of the LT1490/  
LT1491includesbothsuppliesandtheoutputswingstoboth  
supplies. Unlike most micropower op amps, the LT1490/  
LT1491 can drive heavy loads; their rail-to-rail outputs drive  
20mA.TheLT1490/LT1491areunity-gainstableanddriveall  
capacitive loads up to 10,000pF when optional 0.22µF and  
150compensation is used.  
Rail-to-Rail Input and Output  
Single Supply Input Range: 0.4V to 44V  
Micropower: 50µA/Amplifier Max  
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  
The LT1490/LT1491 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 resis-  
tors protect the inputs for faults below the negative supply  
upto22V.Thereisnophasereversaloftheoutputforinputs  
22V below Vor 44V above V, independent of V+.  
U
APPLICATIONS  
Battery- or Solar-Powered Systems  
Portable Instrumentation  
Sensor Conditioning  
Supply Current Sensing  
The LT1490 dual op amp is available in the 8-pin SO and  
PDIPpackages. ThequadLT1491isavailableinthe14-pin  
Battery Monitoring  
Micropower Active Filters  
4mA to 20mA Transmitters  
SO and PDIP packages.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
Battery Monitor  
R
R
S
A
0.2Ω  
2k  
Q1  
2N3904  
CHARGER  
VOLTAGE  
+
A
R
I
A
'
BATT  
1/4 LT1491  
2k  
C
LOGIC  
1/4 LT1491  
+
R
B
Q2  
2N3904  
2k  
LOGIC HIGH (5V) = CHARGING  
LOGIC LOW (0V) = DISCHARGING  
+
B
R
B
'
1/4 LT1491  
2k  
LOAD  
+
D
+
R
G
V
1/4 LT1491  
OUT  
10k  
V
= 12V  
BATT  
S1  
10k  
90.9k  
V
V
=
OUT  
OUT  
S1 = OPEN, GAIN = 1  
S1 = CLOSED, GAIN = 10  
R
= R  
A
S
B
I
=
AMPS  
BATT  
1490/91 TA01  
(R )(R /R )(GAIN) GAIN  
V
= 5V, 0V  
S
G
A
1

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