Datasheet REF20-Q1 (Texas Instruments)
| Fabricante | Texas Instruments |
| Descripción | Automotive low-drift, low-power, series voltage reference |
| Páginas / Página | 36 / 1 — REF20-Q1. REF20xx-Q1 Low-Drift, Low-Power, Dual-Output, VREF and VREF / 2 … |
| Formato / tamaño de archivo | PDF / 3.4 Mb |
| Idioma del documento | Inglés |
REF20-Q1. REF20xx-Q1 Low-Drift, Low-Power, Dual-Output, VREF and VREF / 2 Voltage References. 1 Features. 3 Description
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REF20-Q1
SBOSA80 – DECEMBER 2021
REF20xx-Q1 Low-Drift, Low-Power, Dual-Output, VREF and VREF / 2 Voltage References 1 Features 3 Description
• AEC-Q100 qualified with the following results: Applications with only a positive supply voltage often – Device temperature grade 1: –40°C to +125°C require additional stable voltage in the middle of the ambient operating temperature analog-to-digital converter (ADC) input range to bias – Device HBM ESD classification level 2 input bipolar signals. The REF20xx-Q1 provides a – Device CDM ESD classification level C7B reference voltage (VREF) for the ADC and a second • Functional Safety-Capable highly-accurate voltage (VBIAS) that can be used to – Documentation available to aid functional safety bias the input bipolar signals. system design The REF20xx-Q1 offers excellent temperature drift • Two Outputs, VREF and VREF / 2, for convenient (8 ppm/°C, maximum) and initial accuracy (0.05%) use in single-supply systems on both the VREF and VBIAS outputs while operating • Excellent temperature drift performance: at a quiescent current less than 430 µA. In addition, – 8 ppm/°C (maximum) from –40°C to 125°C the VREF and VBIAS outputs track each other with • High initial accuracy: ±0.05% (maximum) a precision of 7 ppm/°C (maximum) across the • VREF and VBIAS tracking overtemperature: temperature range of –40°C to 125°C. All these – 7 ppm/°C (maximum) from –40°C to 125°C features increase the precision of the signal chain and • Microsize package: SOT23-5 decrease board space, while reducing the cost of the • Low dropout voltage: 10 mV system as compared to a discrete solution. Extremely • High output current: ±20 mA low dropout voltage of only 10 mV allows operation • Low quiescent current: 360 μA from very low input voltages, which can be very useful • Line regulation: 3 ppm/V in battery-operated systems. • Load regulation: 8 ppm/mA Both the VREF and VBIAS voltages have the same
2 Applications
excellent specifications and can sink and source current equally well. Very good long-term stability and • Telematics control low noise levels make these devices ideally-suited for • Battery management systems high-precision applications. • Inverter and motor control • Automotive gateway
Device Information
• Power distribution box
PART NAME PACKAGE
(1)
BODY SIZE (NOM)
• Power steering REF20xx-Q1 SOT-23 (5) 2.90 mm × 1.60 mm • On board chargers (1) For all available packages, see the orderable addendum at the end of the datasheet. Power 0.05 Supply 0.04 0.03 (%) y V LOAD c 0.02 BIAS ra u c 0.01 c VIN+ A V e 0 OUT
INA240-Q1 ADC
R g SHUNT ISENSE lta -0.01 VIN- o t V REF1 REF2 -0.02 u tp VREF u -0.03 O
V V
-0.04
BIAS = 1.5 V REF = 3.0 V
-0.05
REF20-Q1
±75 ±50 ±25 0 25 50 75 100 125 150 EN VIN GND Temperature (ƒC) C001
Application Example VREF and VBIAS vs Temperature
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 Thermal Hysteresis 8.4 Noise Performance 9 Detailed Description 9.1 Overview 9.2 Functional Block Diagram 9.3 Feature Description 9.3.1 VREF and VBIAS Tracking 9.3.2 Low Temperature Drift 9.3.3 Load Current 9.4 Device Functional Modes 10 Applications and Implementation 10.1 Application Information 10.2 Typical Application 10.2.1 Low-Side, Current-Sensing Application 10.2.1.1 Design Requirements 10.2.1.2 Detailed Design Procedure 10.2.1.2.1 Shunt Resistor 10.2.1.2.2 Differential Amplifier 10.2.1.2.3 Voltage Reference 10.2.1.2.4 Error Calculations 10.2.1.2.5 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 Receiving Notification of Documentation Updates 13.3 Support Resources 13.4 Trademarks 13.5 Electrostatic Discharge Caution 13.6 Glossary 14 Mechanical, Packaging, and Orderable Information
REF20-Q1
SBOSA80 – DECEMBER 2021
REF20xx-Q1 Low-Drift, Low-Power, Dual-Output, VREF and VREF / 2 Voltage References 1 Features 3 Description
• AEC-Q100 qualified with the following results: Applications with only a positive supply voltage often – Device temperature grade 1: –40°C to +125°C require additional stable voltage in the middle of the ambient operating temperature analog-to-digital converter (ADC) input range to bias – Device HBM ESD classification level 2 input bipolar signals. The REF20xx-Q1 provides a – Device CDM ESD classification level C7B reference voltage (VREF) for the ADC and a second • Functional Safety-Capable highly-accurate voltage (VBIAS) that can be used to – Documentation available to aid functional safety bias the input bipolar signals. system design The REF20xx-Q1 offers excellent temperature drift • Two Outputs, VREF and VREF / 2, for convenient (8 ppm/°C, maximum) and initial accuracy (0.05%) use in single-supply systems on both the VREF and VBIAS outputs while operating • Excellent temperature drift performance: at a quiescent current less than 430 µA. In addition, – 8 ppm/°C (maximum) from –40°C to 125°C the VREF and VBIAS outputs track each other with • High initial accuracy: ±0.05% (maximum) a precision of 7 ppm/°C (maximum) across the • VREF and VBIAS tracking overtemperature: temperature range of –40°C to 125°C. All these – 7 ppm/°C (maximum) from –40°C to 125°C features increase the precision of the signal chain and • Microsize package: SOT23-5 decrease board space, while reducing the cost of the • Low dropout voltage: 10 mV system as compared to a discrete solution. Extremely • High output current: ±20 mA low dropout voltage of only 10 mV allows operation • Low quiescent current: 360 μA from very low input voltages, which can be very useful • Line regulation: 3 ppm/V in battery-operated systems. • Load regulation: 8 ppm/mA Both the VREF and VBIAS voltages have the same
2 Applications
excellent specifications and can sink and source current equally well. Very good long-term stability and • Telematics control low noise levels make these devices ideally-suited for • Battery management systems high-precision applications. • Inverter and motor control • Automotive gateway
Device Information
• Power distribution box
PART NAME PACKAGE
(1)
BODY SIZE (NOM)
• Power steering REF20xx-Q1 SOT-23 (5) 2.90 mm × 1.60 mm • On board chargers (1) For all available packages, see the orderable addendum at the end of the datasheet. Power 0.05 Supply 0.04 0.03 (%) y V LOAD c 0.02 BIAS ra u c 0.01 c VIN+ A V e 0 OUT
INA240-Q1 ADC
R g SHUNT ISENSE lta -0.01 VIN- o t V REF1 REF2 -0.02 u tp VREF u -0.03 O
V V
-0.04
BIAS = 1.5 V REF = 3.0 V
-0.05
REF20-Q1
±75 ±50 ±25 0 25 50 75 100 125 150 EN VIN GND Temperature (ƒC) C001
Application Example VREF and VBIAS vs Temperature
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 Thermal Hysteresis 8.4 Noise Performance 9 Detailed Description 9.1 Overview 9.2 Functional Block Diagram 9.3 Feature Description 9.3.1 VREF and VBIAS Tracking 9.3.2 Low Temperature Drift 9.3.3 Load Current 9.4 Device Functional Modes 10 Applications and Implementation 10.1 Application Information 10.2 Typical Application 10.2.1 Low-Side, Current-Sensing Application 10.2.1.1 Design Requirements 10.2.1.2 Detailed Design Procedure 10.2.1.2.1 Shunt Resistor 10.2.1.2.2 Differential Amplifier 10.2.1.2.3 Voltage Reference 10.2.1.2.4 Error Calculations 10.2.1.2.5 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 Receiving Notification of Documentation Updates 13.3 Support Resources 13.4 Trademarks 13.5 Electrostatic Discharge Caution 13.6 Glossary 14 Mechanical, Packaging, and Orderable Information