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LT1674IS#TRPBF

更新时间： 2024-11-18 13:09:39
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凌特 - Linear 运算放大器输出元件输入元件
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LT1672/LT1673/LT1674  
2µA Max, AV ≥ 5 Single, Dual  
and Quad Over-The-Top Precision  
Rail-to-Rail Input and Output Op Amps  
U
FEATURES  
DESCRIPTIO  
The LT®1672/LT1673/LT1674 are ultralow power  
■
Gain of 5 Stable  
■
(IS ≤ 2µA) decompensated (AV ≥ 5) op amps with preci-  
sion specifications. The extremely low supply current is  
combined with excellent amplifier specifications: input  
offset voltage is 375µV maximum with a typical drift of  
only 0.4µV/°C, input offset current is 100pA maximum. A  
minimumopen-loopgain(AVOL)of100V/mVensuresthat  
gain errors are small. The devices’ characteristics change  
little over the supply range of 2.2V to ±15V. Supply  
rejection is 90dB and the common mode rejection ratio is  
90dB. Operationisspecifiedfor3V, 5Vand±15Vsupplies.  
Reverse battery protection (–18V min) and inputs that  
operate above the positive supply make the LT1672/  
LT1673/LT1674 easy to use in harsh environments.  
Low Supply Current: 2µA Max per Amplifier  
■
Rail-to-Rail Input and Output  
■
■
■
■
■
■
■
■
■
■
Low Offset Voltage: 375µV Max  
Over-The-TopTM Inputs Operate Above V+  
Gain Bandwidth Product: 12kHz  
Wide Supply Range: 2.2V to 36V  
Single Supply Input Range: –0.3V to 36V  
Low Input Bias Current: 250pA  
Low Input Offset Current: 20pA  
High AVOL: 100V/mV Minimum Driving 100kΩ Load  
Output Sources and Sinks 500µA Load Current  
Reverse Battery Protected to 18V  
U
The low bias currents and offset current of the amplifier  
permit the use of megohm level source resistors without  
introducing significant errors. Voltage noise at 4µVP-P is  
remarkably low considering the low supply current. For  
unity gain stable versions of these amplifiers, see the  
LT1494/LT1495/LT1496.  
APPLICATIO S  
■
Battery- or Solar-Powered Systems  
■
Portable Instrumentation  
■
Remote Sensor Amplifier  
■
Micropower Filter  
Photodiode Amplifier  
■
The LT1672 is available in the 8-pin MSOP, PDIP and SO  
packages. The LT1673 is available in plastic 8-pin PDIP  
and SO-8 packages with the standard dual op amp pinout.  
The LT1674 is available in 14-pin PDIP and SO packages.  
■
High Impedance Circuits  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Over-The-Top is a trademark of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
TC VOS Distribution  
Single Supply, 60µW Precision Instrumentation Amplifier  
80  
120 AMPLIFIERS  
5V  
V
= ±2.5V  
S
70  
60  
50  
40  
30  
20  
10  
0
100k*  
–40°C to 85°C  
V
+
IN1  
1M  
5V  
1/2 LT1673  
–
110k  
1M  
100k  
100k  
–
+
LT1672  
V
OUT  
1M  
1000pF  
110k  
1M  
1M  
–
A
= 100  
V
5V  
BANDWIDTH = 1kHz  
1/2 LT1673  
CMRR = 65dB AT 120Hz  
0.0047µF  
LT1389-2.5  
–1.5  
–0.9  
–0.3  
0.3  
0.9  
1.5  
100k*  
*500V TRANSIENT PROTECTION  
TOTAL SUPPLY CURRENT = 12µA  
V
IN2  
+
TC V (µV/°C)  
OS  
1672/3/4 TA01  
1672/3/4 TA02  
1
1234567...12

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