Datasheet REF35 (Texas Instruments)
| 制造商 | Texas Instruments |
| 描述 | 650-nA quiescent current, 12-ppm/°C drift, ultra-low-power precision voltage reference |
| 页数 / 页 | 44 / 1 — REF35. REF35 Ultra Low-Power, High-Precision Voltage Reference. 1 … |
| 文件格式/大小 | PDF / 2.2 Mb |
| 文件语言 | 英语 |
REF35. REF35 Ultra Low-Power, High-Precision Voltage Reference. 1 Features. 3 Description. 2 Applications. Package Information
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REF35
SNAS809C – DECEMBER 2021 – REVISED SEPTEMBER 2024
REF35 Ultra Low-Power, High-Precision Voltage Reference 1 Features 3 Description
• Ultra-low quiescent current: The REF35 is a family of nanopower, low-drift, high- – 650nA (typical) precision series reference devices. The REF35 family • Initial accuracy: ±0.05% (maximum) features ±0.05% initial accuracy with 650nA typical • Temperature coefficient (maximum): power consumption. The temperature coefficient – 12ppm/°C (−40°C to 105°C, SOT23 package) (12ppm/°C) and long-term stability (40ppm at 1000 – 10ppm/°C (−40°C to 85°C, WCSP package) hours) of the device can help improve system stability • Output 1/f noise (0.1Hz to 10Hz): 3.3ppm and reliability. The low power consumption combined P-P • NR pin to reduce noise with high precision specifications are designed for a • EN pin to reduce shutdown current consumption wide variety of portable and low current applications. • Long-term stability: 40ppm at 1k hour The REF35 supplies up to 10mA current with • Thermal hysteresis: 70ppm 3.3ppmp-p noise and 20ppm/mA load regulation. With • Operating temperature range: −55°C to +125°C this feature set, REF35 creates a strong low-noise, • Output current: +10mA, −5mA high accuracy power supply for precision sensors and • Input voltage: VREF + VDO to 6V 12–16b data converters. • Output voltage options: – 1.024V, 1.2V, 1.25V, 1.6V, 1.8V, 2.048V, The family is specified for operation from –40°C to 2.5V, 3.0V, 3.3V, 4.096V, 5.0V 105°C and is functional over –55°C to 125°C. The • Small footprint 6-pin SOT−23 package wide temperature is suited for industrial applications. • Smallest footprint 4-pin WCSP package REF35 is available in wide output voltage variants
2 Applications
starting from 1.024V to 5.0V. The device is offered in a space-saving, 6-pin SOT-23 and 4-pin WCSP • Flow transmitter package options. Contact your local TI sales • Blood glucose monitor representative for available voltage and package • Servo drive control module options. • Power quality analyzer
Package Information
• Fault indicator
PART NUMBER PACKAGE
(1)
BODY SIZE (NOM)
(2) • Oscilloscope • Process analytics SOT-23 (6) 2.90mm × 1.60mm REF35xxx • Optical Module WCSP (4) 1.05mm × 0.84mm (1) For all available voltage variants and packages, see the orderable addendum at the end of the data sheet. (2) The package size (length × width) is a nominal value and includes pins, where applicable. Connection Diagram Typical Application Use Cases REF35 REF35 REF35 EN R Input Output R Current R VIN VREF REF SENSE VDD 1 μF 0.1 μF V GND NR ADC / DAC REF35 R R GND Optional GND GND GND GND GND Amplifier Biasing Sensor power supply Data Converter power supply CSA, INA, DFA etc Bridge, Thermocouple etc
REF35 Use Case
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 Device Comparison 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics 6.6 Electrical Characteristics YBH package 6.7 Typical Characteristics 7 Parameter Measurement Information 7.1 Solder Heat Shift 7.2 Temperature Coefficient 7.3 Long-Term Stability 7.4 Thermal Hysteresis 7.5 Noise Performance 7.5.1 Low-Frequency (1/f) Noise 7.5.2 Broadband Noise 7.6 Power Dissipation 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Supply Voltage 8.3.2 EN Pin 8.3.3 NR Pin 8.4 Device Functional Modes 8.4.1 Basic Connections 8.4.2 Start-Up 8.4.3 Output Transient Behavior 9 Application and Implementation 9.1 Application Information 9.2 Typical Applications 9.2.1 Negative Reference Voltage 9.2.2 Precision Power Supply and Reference 9.2.2.1 Design Requirements 9.2.2.2 Detailed Design Procedure 9.2.2.2.1 Selection of Reference 9.2.2.2.2 Input and Output Capacitors 9.2.2.2.3 Selection of ADC 9.2.2.3 Application Curves 9.3 Power Supply Recommendations 9.4 Layout 9.4.1 Layout Guidelines 9.4.2 Layout Examples 10 Device and Documentation Support 10.1 Documentation Support 10.1.1 Related Documentation 10.2 Receiving Notification of Documentation Updates 10.3 Support Resources 10.4 Trademarks 10.5 Electrostatic Discharge Caution 10.6 Glossary 11 Revision History 12 Mechanical, Packaging, and Orderable Information
REF35
SNAS809C – DECEMBER 2021 – REVISED SEPTEMBER 2024
REF35 Ultra Low-Power, High-Precision Voltage Reference 1 Features 3 Description
• Ultra-low quiescent current: The REF35 is a family of nanopower, low-drift, high- – 650nA (typical) precision series reference devices. The REF35 family • Initial accuracy: ±0.05% (maximum) features ±0.05% initial accuracy with 650nA typical • Temperature coefficient (maximum): power consumption. The temperature coefficient – 12ppm/°C (−40°C to 105°C, SOT23 package) (12ppm/°C) and long-term stability (40ppm at 1000 – 10ppm/°C (−40°C to 85°C, WCSP package) hours) of the device can help improve system stability • Output 1/f noise (0.1Hz to 10Hz): 3.3ppm and reliability. The low power consumption combined P-P • NR pin to reduce noise with high precision specifications are designed for a • EN pin to reduce shutdown current consumption wide variety of portable and low current applications. • Long-term stability: 40ppm at 1k hour The REF35 supplies up to 10mA current with • Thermal hysteresis: 70ppm 3.3ppmp-p noise and 20ppm/mA load regulation. With • Operating temperature range: −55°C to +125°C this feature set, REF35 creates a strong low-noise, • Output current: +10mA, −5mA high accuracy power supply for precision sensors and • Input voltage: VREF + VDO to 6V 12–16b data converters. • Output voltage options: – 1.024V, 1.2V, 1.25V, 1.6V, 1.8V, 2.048V, The family is specified for operation from –40°C to 2.5V, 3.0V, 3.3V, 4.096V, 5.0V 105°C and is functional over –55°C to 125°C. The • Small footprint 6-pin SOT−23 package wide temperature is suited for industrial applications. • Smallest footprint 4-pin WCSP package REF35 is available in wide output voltage variants
2 Applications
starting from 1.024V to 5.0V. The device is offered in a space-saving, 6-pin SOT-23 and 4-pin WCSP • Flow transmitter package options. Contact your local TI sales • Blood glucose monitor representative for available voltage and package • Servo drive control module options. • Power quality analyzer
Package Information
• Fault indicator
PART NUMBER PACKAGE
(1)
BODY SIZE (NOM)
(2) • Oscilloscope • Process analytics SOT-23 (6) 2.90mm × 1.60mm REF35xxx • Optical Module WCSP (4) 1.05mm × 0.84mm (1) For all available voltage variants and packages, see the orderable addendum at the end of the data sheet. (2) The package size (length × width) is a nominal value and includes pins, where applicable. Connection Diagram Typical Application Use Cases REF35 REF35 REF35 EN R Input Output R Current R VIN VREF REF SENSE VDD 1 μF 0.1 μF V GND NR ADC / DAC REF35 R R GND Optional GND GND GND GND GND Amplifier Biasing Sensor power supply Data Converter power supply CSA, INA, DFA etc Bridge, Thermocouple etc
REF35 Use Case
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 Device Comparison 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics 6.6 Electrical Characteristics YBH package 6.7 Typical Characteristics 7 Parameter Measurement Information 7.1 Solder Heat Shift 7.2 Temperature Coefficient 7.3 Long-Term Stability 7.4 Thermal Hysteresis 7.5 Noise Performance 7.5.1 Low-Frequency (1/f) Noise 7.5.2 Broadband Noise 7.6 Power Dissipation 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Supply Voltage 8.3.2 EN Pin 8.3.3 NR Pin 8.4 Device Functional Modes 8.4.1 Basic Connections 8.4.2 Start-Up 8.4.3 Output Transient Behavior 9 Application and Implementation 9.1 Application Information 9.2 Typical Applications 9.2.1 Negative Reference Voltage 9.2.2 Precision Power Supply and Reference 9.2.2.1 Design Requirements 9.2.2.2 Detailed Design Procedure 9.2.2.2.1 Selection of Reference 9.2.2.2.2 Input and Output Capacitors 9.2.2.2.3 Selection of ADC 9.2.2.3 Application Curves 9.3 Power Supply Recommendations 9.4 Layout 9.4.1 Layout Guidelines 9.4.2 Layout Examples 10 Device and Documentation Support 10.1 Documentation Support 10.1.1 Related Documentation 10.2 Receiving Notification of Documentation Updates 10.3 Support Resources 10.4 Trademarks 10.5 Electrostatic Discharge Caution 10.6 Glossary 11 Revision History 12 Mechanical, Packaging, and Orderable Information