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LT1797_1

更新时间: 2024-09-24 11:48:59
品牌 Logo 应用领域
凌特 - Linear 运算放大器
页数 文件大小 规格书
14页 189K
描述
10MHz, Rail-to-Rail Input and Output Op Amp in SOT-23

LT1797_1 数据手册

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LT1797  
10MHz, Rail-to-Rail  
Input and Output  
Op Amp in SOT-23  
FEATURES  
DESCRIPTION  
TheLT®1797isaunity-gainstable10MHzopampavailable  
in the small SOT-23 package that operates on all single  
and split supplies with a total voltage of 2.7V to 12V. The  
amplifier draws 1mA of quiescent current and has a slew  
rate of 2.25V/μs.  
n
Rail-to-Rail Input and Output  
n
Small SOT-23 Package  
n
Gain Bandwidth Product: 10MHz  
n
–40°C to 85°C Operation  
Slew Rate: 2.25V/μs  
n
n
Low Input Offset Voltage: 1.5mV Max  
The input common mode range of the LT1797 includes  
both rails, making it ideal for current sensing applications.  
The input stage incorporates phase reversal protection  
to prevent false outputs from occurring when the inputs  
are driven beyond the supplies. Protective resistors are  
includedintheinputleadssothatcurrentdoesnotbecome  
excessive when the inputs are forced above or below the  
supplies.  
n
High Output Current: 25mA Min  
n
Specified on 3V, 5V and 5V Supplies  
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High Voltage Gain: 1000V/mV 10k Load  
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High CMRR: 96dB Typ  
High PSRR: 90dB Typ  
Input Bias Current: 300nA Max  
Input Offset Current: 25nA Max  
n
n
n
n
Low Profile (1mm) SOT-23 (ThinSOT™) Package  
+
The output of the LT1797 can swing to within 50mV of V  
and 8mV of V without drawing excess current in either  
APPLICATIONS  
condition. The amplifier can drive loads up to 25mA and  
still maintain rail-to-rail capability.  
n
Portable Instrumentation  
n
Rail-to-Rail Buffer Amplifiers  
The LT1797 op amp is available in the space saving 5-lead  
SOT-23 package.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
ThinSOT and Over-The-Top are trademarks of Linear Technology Corporation. All other  
trademarks are the property of their respective owners.  
n
Low Voltage Signal Processing  
Driving A/D Converters  
Battery-Powered Systems  
n
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TYPICAL APPLICATION  
Fast Compact –48V Current Sense  
Small-Signal Response  
V
= 3V – 0.1Ω • I  
SENSE  
OUT  
I
= 0A TO 30A  
SENSE  
ACCURACY ≈ 3%  
V
OUT  
1k  
1%  
R1  
4.7k  
Q1  
FMMT493  
V
= 3V  
S
30.1Ω  
1%  
+
R1 REDUCES Q1 DISSIPATION  
3.3k  
0805  
s3  
LT1797  
1797 TA01b  
0.1μF  
V
A
=
2.5V  
SETTLES TO 1% IN 2μs,  
1V OUTPUT STEP  
S
V
L
= 1  
BZX84C6V8  
R
= 10k  
0.003Ω  
1% 3W  
V
= 6.8V  
Z
–48V LOAD  
–48V SUPPLY  
(–42V TO –56V)  
1797 TA01  
+
I
SENSE  
1797fb  
1

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