Datasheet REF34-Q1 (Texas Instruments)

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REF34-Q1 www.ti.com
SBAS901C – JULY 2018 – REVISED OCTOBER 2020
REF34-Q1
SBAS901C – JULY 2018 – REVISED OCTOBER 2020
REF34-Q1 Low-Drift, Low-Power, Small-Footprint Series Voltage References 1 Features 3 Description
• AEC-Q100 qualified with the following results: The REF34-Q1 devices are low-temperature-drift – Device temperature grade 1: –40°C to +125°C (6 ppm/°C), low-power, high-precision CMOS voltage ambient operating temperature references. The devices have ±0.05% initial accuracy – Device HBM ESD classification level 2 and low operating current with power consumption – Device CDM ESD classification level C6 less than 95 μA. These devices also offer very low output noise of 3.8 µV • Initial accuracy: ±0.05% (maximum) PP/V, which enable the devices to maintain high signal integrity with high-resolution • Temperature coefficient : 6 ppm/°C (maximum) data converters and noise critical systems. • Operating temperature range: −40°C to +125°C • Output voltage options: 2.5V, 3.0V, 3.3V, 4.096V, Stability and system reliability are further improved by 5.0V the low output-voltage hysteresis of these devices and low long-term output voltage drift. Furthermore, the • Output current: ±10 mA small size and low operating current of the devices • Low quiescent current: 95 μA (maximum) (95 μA) make them an excellent choise for battery- • Low shutdown mode current: 3 μA (maximum) powered applications. The REF34-Q1 features an • Wide input voltage: 12 V enable pin that can set the device into shutdown • Output 1/f noise (0.1 Hz to 10 Hz): 3.8 µVPP/V where it consumes a low stand by current (3 μA) to • Excellent long-term stability 25 ppm/1000 hrs help with overall system power during standby. • Available in 6-pin and 5-Pin SOT-23 package and The REF34-Q1 family is specified for the wide 8-pin MSOP package temperature range of −40°C to +125°C. Contact the
2 Applications
TI sales representative for additional voltage options. • Body control modules
Device Information (1)
• On board chargers
PART NUMBER PACKAGE BODY SIZE (NOM)
• Traction inverters REF34xx-Q1 SOT-23 (6) 2.90 mm × 1.60 mm • Battery management systems REF34xxS-Q1 SOT-23 (5) 2.90 mm × 1.60 mm • Advanced driver assistance systems REF34xx-Q1 VSSOP (8) 4.00 mm × 4.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. 3V VDD 0.4 0.36 +125°C VDD 2.5V VREF 0.32 AIN0 VREF+ OUT IN AIN1 0.28 AIN2 VREF- GND EN e (V) +25°C AIN3 ag 0.24 REF3425-Q1 ADS7828-Q1 olt 0.2 t V -40°C 3.3V VDD ou 0.16 Drop 0.12 I2C VDD 0.08 GPIO0 I2C GPIOx 0.04 0 TDA2 (MCU) -10 -5 0 5 10 Load Current (mA) Copyright © 2017, Texas Instruments Incorporated drop
Simplified Schematic Dropout vs Current Load Over Temperature
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, Copyright © 2020 Texas Instruments Incorporated Submit Document Feedback 1 intellectual property matters and other important disclaimers. PRODUCTION DATA. Product Folder Links: REF34-Q1 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Device Comparison Table 6 Pin Configuration and Functions 6.1 Pin 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 8 Typical Characteristics 9 Parameter Measurement Information 9.1 Solder Heat Shift 9.2 Long-Term Stability 9.3 Thermal Hysteresis 9.4 Power Dissipation 9.5 Noise Performance 10 Detailed Description 10.1 Overview 10.2 Functional Block Diagram 10.3 Feature Description 10.3.1 Supply Voltage 10.3.2 Low Temperature Drift 10.3.3 Load Current 10.4 Device Functional Modes 10.4.1 EN Pin 11 Application and Implementation 11.1 Application Information 11.2 Typical Applications 11.2.1 Basic Voltage Reference Connection 11.2.1.1 Design Requirements 11.2.1.2 Detailed Design Procedure 11.2.1.2.1 Input and Output Capacitors 11.2.1.2.2 4-Wire Kelvin Connections 11.2.1.2.3 V​IN Slew Rate Considerations 11.2.1.2.4 Shutdown/Enable Feature 11.2.1.3 Application Curves 11.2.2 Advanced Driver Assistance Systems (ADAS) Microcontroller Connection 11.2.2.1 Basic Voltage Reference Connection 11.2.2.2 Design Requirements 11.2.2.3 Detailed Design Procedure 11.2.2.4 Enable Feature in ADAS 12 Power Supply Recommendations 13 Layout 13.1 Layout Guidelines 13.2 Layout Example 14 Device and Documentation Support 14.1 Documentation Support 14.1.1 Related Documentation 14.2 Receiving Notification of Documentation Updates 14.3 Support Resources 14.4 Trademarks 14.5 Electrostatic Discharge Caution 14.6 Glossary 15 Mechanical, Packaging, and Orderable Information