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REF1112 10ppm/°C, 1μA, 1.25V Shunt Voltage Reference
SBOS283E
September 2003 – December 2024
REF1112
PRODUCTION DATA
CONTENTS
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REF1112 10ppm/°C, 1μA, 1.25V Shunt Voltage Reference
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.4
Device Functional Modes
7
Application and Implementation
7.1
Application Information
7.2
Typical Applications
7.2.1
Shunt Regulator
7.2.1.1
Design Requirements
7.2.1.2
Detailed Design Procedure
7.2.2
MicroPOWER 3μA, 1V Voltage Reference
7.2.2.1
Design Requirements
7.2.2.2
Detailed Design Procedure
7.2.3
2.5V Reference on 1μA
7.2.3.1
Design Requirements
7.2.3.2
Detailed Design Procedure
7.2.4
Adjustable Voltage Shunt Reference
7.2.5
Level Shift to Achieve Full ADC Input Range
7.2.6
Stable Current Source
7.3
Power Supply Recommendations
7.4
Layout
7.4.1
Layout Guidelines
7.4.2
Layout Example
8
Device and Documentation Support
8.1
Receiving Notification of Documentation Updates
8.2
Support Resources
8.3
Trademarks
8.4
Electrostatic Discharge Caution
8.5
Glossary
9
Revision History
10
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
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Data Sheet
REF1112 10ppm/°C, 1μA, 1.25V Shunt Voltage Reference
1
Features
Small package: SOT23-3
Fixed reverse breakdown voltage of 1.25V
Key specifications
Output voltage tolerance: ±0.2% (maximum)
Low output noise (0.1Hz to 10Hz): 25μV
pp
(typical)
Temperature range: −40°C to +125°C
Operating current range: 1.2μA to 5mA
Low temperature coefficient from 0°C to +70°C: 30ppm/°C (maximum)
Low temperature coefficient from –40°C to +85°C: 50ppm/°C (maximum)