Datasheet REF3425-EP (Texas Instruments)
| Manufacturer | Texas Instruments |
| Description | Enhanced product, 2.5-V, low-drift, low-power series voltage reference |
| Pages / Page | 28 / 1 — REF3425-EP. , REF3430-EP,. REF3433-EP,. REF3440-EP. REF34xx-EP Low-Drift, … |
| File Format / Size | PDF / 1.8 Mb |
| Document Language | English |
REF3425-EP. , REF3430-EP,. REF3433-EP,. REF3440-EP. REF34xx-EP Low-Drift, Low-Power, Small-Footprint Series Voltage Reference
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REF3425-EP , REF3430-EP, REF3433-EP, REF3440-EP
SBAS942B – DECEMBER 2018 – REVISED APRIL 2019
REF34xx-EP Low-Drift, Low-Power, Small-Footprint Series Voltage Reference 1 Features 3 Description
• Initial accuracy: ±0.05% (maximum) The REF34xx-EP device is a low temperature drift 1 (10 ppm/°C), low-power, high-precision CMOS • Temperature coefficient: 10 ppm/°C (maximum) voltage reference, featuring ±0.05% initial accuracy, • Output current: ±10 mA low operating current with power consumption less • Low quiescent current: 95 µA (maximum) than 95 µA. This device also offers very low output • Wide input voltage: 12 V noise of 3.8 µVp-p/V, which enables its ability to maintain high signal integrity with high-resolution data • Output 1/f noise (0.1 Hz to 10 Hz): 3.8 µVPP/V converters in noise critical systems. With a small • Small footprint 6-pin SOT-23 package SOT-23 package, REF34xx-EP offers enhanced • Excellent long-term stability 25 ppm/1000 hrs specifications and pin-to-pin replacement for MAX607x and ADR34xx. The REF34xx-EP family is • Supports defense, aerospace, and medical compatible to most ADC and DAC. applications: – Controlled baseline Stability and system reliability are further improved by the low output-voltage hysteresis of the device and – One assembly/test site low long-term output voltage drift. The small size and – One fabrication site low operating current of the devices (95 µA) can – Available extended (–55°C to 125°C) benefit portable and battery-powered applications. temperature range REF34xx-EP is specified for the wide temperature – Extended product life cycle range of –55°C to 125°C. Contact the TI sales representative for additional voltage options. – Extended product-change notification – Product traceability
Device Information(1) PART NAME PACKAGE BODY SIZE (NOM) 2 Applications
REF3425-EP • Precision data acquisition systems REF3430-EP SOT-23 (6) 2.90 mm × 1.60 mm • PLC analog I/O modules REF3433-EP • Field transmitters REF3440-EP • Industrial instrumentation (1) For all available packages, see the orderable addendum at • Test equipment the end of the data sheet. • Power monitoring
Simplified Schematic Dropout vs Current Load Over Temperature
10 10 0.4 0.36 124 +125°C ± 0.32 Input Signal 1 nF ADS1287 + 0.28 REF e (V) +25°C 0.24 ag VIN olt 0.2 -40°C t V CIN ou 0.16 COUT 1 µF REF34xx-EP 10 µF Drop 0.12 0.08 0.04 Copyright © 2017, Texas Instruments Incorporated 0 0 5 10 Load Current (mA) D001 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Device Comparison Table 6 Pin Configuration and Functions 7 Specifications 7.1 Absolute Maximum Ratings 7.2 ESD Ratings 7.3 Recommended Operating Conditions 7.4 Thermal Information 7.5 Electrical Characteristics 7.6 Typical Characteristics 8 Parameter Measurement Information 8.1 Solder Heat Shift 8.2 Long-Term Stability 8.3 Power Dissipation 8.4 Noise Performance 9 Detailed Description 9.1 Overview 9.2 Functional Block Diagram 9.3 Feature Description 9.3.1 Supply Voltage 9.3.2 Low Temperature Drift 9.3.3 Load Current 9.4 Device Functional Modes 9.4.1 EN Pin 9.4.2 Negative Reference Voltage 10 Application and Implementation 10.1 Application Information 10.2 Typical Application: Basic Voltage Reference Connection 10.2.1 Design Requirements 10.2.2 Detailed Design Procedure 10.2.2.1 Input and Output Capacitors 10.2.2.2 4-Wire Kelvin Connections 10.2.2.3 VIN Slew Rate Considerations 10.2.2.4 Shutdown/Enable Feature 10.2.3 Application Curves 11 Power Supply Recommendations 12 Layout 12.1 Layout Guidelines 12.2 Layout Example 13 Device and Documentation Support 13.1 Documentation Support 13.1.1 Related Documentation 13.2 Related Links 13.3 Receiving Notification of Documentation Updates 13.4 Community Resources 13.5 Trademarks 13.6 Electrostatic Discharge Caution 13.7 Glossary 14 Mechanical, Packaging, and Orderable Information
REF3425-EP , REF3430-EP, REF3433-EP, REF3440-EP
SBAS942B – DECEMBER 2018 – REVISED APRIL 2019
REF34xx-EP Low-Drift, Low-Power, Small-Footprint Series Voltage Reference 1 Features 3 Description
• Initial accuracy: ±0.05% (maximum) The REF34xx-EP device is a low temperature drift 1 (10 ppm/°C), low-power, high-precision CMOS • Temperature coefficient: 10 ppm/°C (maximum) voltage reference, featuring ±0.05% initial accuracy, • Output current: ±10 mA low operating current with power consumption less • Low quiescent current: 95 µA (maximum) than 95 µA. This device also offers very low output • Wide input voltage: 12 V noise of 3.8 µVp-p/V, which enables its ability to maintain high signal integrity with high-resolution data • Output 1/f noise (0.1 Hz to 10 Hz): 3.8 µVPP/V converters in noise critical systems. With a small • Small footprint 6-pin SOT-23 package SOT-23 package, REF34xx-EP offers enhanced • Excellent long-term stability 25 ppm/1000 hrs specifications and pin-to-pin replacement for MAX607x and ADR34xx. The REF34xx-EP family is • Supports defense, aerospace, and medical compatible to most ADC and DAC. applications: – Controlled baseline Stability and system reliability are further improved by the low output-voltage hysteresis of the device and – One assembly/test site low long-term output voltage drift. The small size and – One fabrication site low operating current of the devices (95 µA) can – Available extended (–55°C to 125°C) benefit portable and battery-powered applications. temperature range REF34xx-EP is specified for the wide temperature – Extended product life cycle range of –55°C to 125°C. Contact the TI sales representative for additional voltage options. – Extended product-change notification – Product traceability
Device Information(1) PART NAME PACKAGE BODY SIZE (NOM) 2 Applications
REF3425-EP • Precision data acquisition systems REF3430-EP SOT-23 (6) 2.90 mm × 1.60 mm • PLC analog I/O modules REF3433-EP • Field transmitters REF3440-EP • Industrial instrumentation (1) For all available packages, see the orderable addendum at • Test equipment the end of the data sheet. • Power monitoring
Simplified Schematic Dropout vs Current Load Over Temperature
10 10 0.4 0.36 124 +125°C ± 0.32 Input Signal 1 nF ADS1287 + 0.28 REF e (V) +25°C 0.24 ag VIN olt 0.2 -40°C t V CIN ou 0.16 COUT 1 µF REF34xx-EP 10 µF Drop 0.12 0.08 0.04 Copyright © 2017, Texas Instruments Incorporated 0 0 5 10 Load Current (mA) D001 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Device Comparison Table 6 Pin Configuration and Functions 7 Specifications 7.1 Absolute Maximum Ratings 7.2 ESD Ratings 7.3 Recommended Operating Conditions 7.4 Thermal Information 7.5 Electrical Characteristics 7.6 Typical Characteristics 8 Parameter Measurement Information 8.1 Solder Heat Shift 8.2 Long-Term Stability 8.3 Power Dissipation 8.4 Noise Performance 9 Detailed Description 9.1 Overview 9.2 Functional Block Diagram 9.3 Feature Description 9.3.1 Supply Voltage 9.3.2 Low Temperature Drift 9.3.3 Load Current 9.4 Device Functional Modes 9.4.1 EN Pin 9.4.2 Negative Reference Voltage 10 Application and Implementation 10.1 Application Information 10.2 Typical Application: Basic Voltage Reference Connection 10.2.1 Design Requirements 10.2.2 Detailed Design Procedure 10.2.2.1 Input and Output Capacitors 10.2.2.2 4-Wire Kelvin Connections 10.2.2.3 VIN Slew Rate Considerations 10.2.2.4 Shutdown/Enable Feature 10.2.3 Application Curves 11 Power Supply Recommendations 12 Layout 12.1 Layout Guidelines 12.2 Layout Example 13 Device and Documentation Support 13.1 Documentation Support 13.1.1 Related Documentation 13.2 Related Links 13.3 Receiving Notification of Documentation Updates 13.4 Community Resources 13.5 Trademarks 13.6 Electrostatic Discharge Caution 13.7 Glossary 14 Mechanical, Packaging, and Orderable Information
