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LT1019CN85 PDF预览

LT1019CN85

更新时间: 2024-11-11 23:48:15
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描述
IC-PRECISION REFERENCE

LT1019CN85 数据手册

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LT1019  
Precision Reference  
U
DESCRIPTIO  
EATURE  
S
F
Available at 2.5V, 4.5V, 5V, and 10V  
Plug-In Replacement for Present References  
Ultra-Low Drift: 3ppm/°C Typical  
Curvature Corrected  
The LT1019 is a third generation bandgap voltage refer-  
ence utilizing thin film technology and a greatly improved  
curvature correction technique. Wafer level trimming of  
both reference and output voltage combines to produce  
units with high yields to very low TC and tight initial  
tolerance of output voltage.  
Series or Shunt Operation  
Ultra-High Line Rejection: 0.5ppm/V  
Low Output Impedance: 0.02Ω  
Tight Initial Output Voltage: <0.05%  
Can Be Heated for Drifts Below 2ppm/°C  
100% Noise Tested  
The LT1019 can both sink and source up to 10mA and can  
be used in either the series or shunt mode. This allows the  
reference to be used for both positive and negative output  
voltages without external components. Minimum input/  
outputvoltageislessthan1Vintheseriesmode,providing  
improved tolerance of low line conditions.  
Temperature Output  
O U  
PPLICATI  
S
A
The LT1019 is available in four voltages: 2.5V, 4.5V, 5V,  
and 10V. It is a direct replacement for most bandgap  
references presently available including AD580, AD581,  
REF-01, REF-02, MC1400, MC1404, and LM168.  
A/D and D/A Converters  
Precision Regulators  
Constant Current Sources  
V/F Converters  
For ultra-low drift applications (<2ppm/°C), the LT1019  
can be operated in a heated mode by driving an internal  
resistor with an external amplifier. Chip temperature can  
be externally set for minimum power consumption.  
Bridge Excitation  
U
O
TYPICAL APPLICATI  
Ultralinear Strain Guage  
Output Voltage Drift  
15V  
357*  
0.5W  
1.003  
5V  
R3  
10ppm/°C  
1.002  
IN  
OUT  
2M  
FULL TEMP RANGE “BOX”  
350Ω  
BRIDGE  
R2  
LT1019-5  
GND  
1.001  
20k  
LT1019  
CURVE  
+
1.000  
A1†  
LT301A  
A2  
LT1001  
R4  
20k  
GAIN = 100  
+
0.999  
5ppm/°C  
0°C TO 70°C “BOX”  
ACTIVE  
ELEMENT  
0.998  
UNCOMPENSATED  
“STANDARD” BANDGAP  
DRIFT CURVE  
R5  
2M  
R6**  
2M  
0.997  
50  
TEMPERATURE (˚C)  
100 125  
–50 –25  
0
25  
75  
LT1019 • TA01  
–5V  
357*  
*REDUCES REFERENCE AND AMPLIFIER  
LT1019 • TA02  
0.5W  
LOADING TO 0.  
**IF R6 = R3, BRIDGE IS NOT LOADED BY R2 AND R4.  
–15V  
A1 V AND DRIFT ARE NOT CRITICAL BECAUSE A2  
OS  
ACTS AS A DIFFERENTIAL AMPLIFIER.  
1

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