Datasheet > LT1019CN825

LT1019CN825

更新时间： 2024-11-11 23:48:15

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IC-PRECISION REFERENCE

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数据手册

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LT1019CN825 数据手册

LT1019

Precision Reference

DESCRIPTIO

EATURE

■

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

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

TYPICAL APPLICATI

Ultralinear Strain Guage

Output Voltage Drift

15V

357Ω*

0.5W

1.003

10ppm/°C

1.002

OUT

FULL TEMP RANGE “BOX”

350Ω

BRIDGE

LT1019-5

GND

1.001

20k

LT1019

CURVE

–

1.000

A1^†

LT301A

LT1001

20k

GAIN = 100

0.999

5ppm/°C

0°C TO 70°C “BOX”

ACTIVE

ELEMENT

0.998

UNCOMPENSATED

“STANDARD” BANDGAP

DRIFT CURVE

R6**

0.997

TEMPERATURE (˚C)

100 125

–50 –25

LT1019 • TA01

–5V

357Ω*

*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

ACTS AS A DIFFERENTIAL AMPLIFIER.

12 3 4 5 6 7...12

中文翻译

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