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LT1991HMS-TRPBF

更新时间: 2024-11-28 05:43:27
品牌 Logo 应用领域
凌特 - Linear 放大器功率放大器
页数 文件大小 规格书
28页 278K
描述
Precision, 100μA Gain Selectable Amplifi er

LT1991HMS-TRPBF 数据手册

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LT1991  
Precision, 100µA  
Gain Selectable Amplifier  
FEATURES  
DESCRIPTION  
The LT®1991 combines a precision operational amplifier  
with eight precision resistors to form a one-chip solution  
for accurately amplifying voltages. Gains from –13 to 14  
with a gain accuracy of 0.04% can be achieved using no  
externalcomponents.Thedeviceisparticularlywellsuited  
for use as a difference amplifier, where the excellent resis-  
tor matching results in a common mode rejection ratio of  
greater than 75dB.  
n
Pin Configurable as a Difference Amplifier,  
Inverting and Noninverting Amplifier  
Difference Amplifier  
n
Gain Range 1 to 13  
CMRR >75dB  
n
Noninverting Amplifier  
Gain Range 0.07 to 14  
n
Inverting Amplifier  
Gain Range –0.08 to –13  
The amplifier features a 50μV maximum input offset volt-  
age and a gain bandwidth product of 560kHz. The device  
operates from any supply voltage from 2.7V to 36V and  
draws only 100μA supply current on a 5V supply. The  
output swings to within 40mV of either supply rail.  
n
Gain Error <0.04%  
Gain Drift < 3ppm/°C  
n
n
Wide Supply Range: Single 2.7V to Split 18V  
n
Micropower: 100μA Supply Current  
n
Precision: 50μV Maximum Input Offset Voltage  
The resistors have excellent matching, 0.04% over tem-  
peratureforthe450kresistors. Thematchingtemperature  
coefficent is guaranteed less than 3ppm/°C. The resistors  
are extremely linear with voltage, resulting in a gain non-  
linearity of less than 10ppm.  
n
560kHz Gain Bandwidth Product  
Rail-to-Rail Output  
n
n
Space Saving 10-Lead MSOP and DFN Packages  
APPLICATIONS  
The LT1991 is fully specified at 5V and 15V supplies and  
from –40°C to 125°C. The device is available in space  
saving 10-lead MSOP and low profile (0.8mm) 3mm ×  
3mm DFN packages.  
n
Handheld Instrumentation  
n
Medical Instrumentation  
n
Strain Gauge Amplifiers  
Differential to Single-Ended Conversion  
n
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
Rail-to-Rail Gain = 1 Difference Amplifier  
Distribution of Resistor Matching  
V
= V  
+ ΔV  
REF IN  
OUT  
5V  
40  
35  
30  
25  
20  
15  
10  
5
SWING 40mV TO  
EITHER RAIL  
450k RESISTORS  
LT1991A  
R
<0.1Ω  
OUT  
50k  
150k  
450k  
450k  
4pF  
+
V
M(IN)  
+
ΔV  
IN  
450k  
150k  
50k  
V
LT1991  
P(IN)  
450k  
INPUT RANGE  
–0.5V TO 5.1V  
R
IN  
= 900kΩ  
0
4pF  
0
–0.04  
–0.02  
0.02  
0.04  
RESISTOR MATCHING (%)  
V
REF  
= 2.5V  
1991 TA01  
1991 TA01b  
1991fg  
1

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