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Texas Instruments REF3450QDGKRQ1
- Part No.:
- REF3450QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REF3450QDGKRQ1.pdf
- Description:
- IC VREF SERIES 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,096
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Product details
Overview
REF3450QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified, low-drift (6 ppm/°C max), low-power (95 µA max) precision CMOS voltage reference delivering 5.0 V output with ±0.05% initial accuracy and ±10 mA output current capability. It operates from −40°C to +125°C and features enable-controlled shutdown (3 µA max), making it suitable for high-accuracy battery management systems and traction inverter feedback loops.
For engineers reviewing the REF3450QDGKRQ1 datasheet, REF3450QDGKRQ1 pinout, REF3450QDGKRQ1 application, or REF3450QDGKRQ1 equivalent, key selection criteria include its 5.0 V output stability under automotive temperature cycling, low 3.8 µVPP/V (0.1–10 Hz) noise performance, force-sense output architecture, and qualification for safety-critical vehicle subsystems.
Technical Context
The REF3450QDGKRQ1 implements a precision bandgap core with buffered force-sense output architecture to minimize load regulation error and thermal hysteresis. Its dual-output (OUT_F/OUT_S) configuration enables Kelvin sensing for high-accuracy closed-loop control in noisy automotive environments.
It integrates an enable input (EN) that places the device into high-impedance shutdown mode with ≤3 µA quiescent current, while maintaining full AEC-Q100 Grade 1 operation across −40°C to +125°C ambient. The device achieves 25 ppm/1000 hrs long-term stability in the DGK (VSSOP-8) package and exhibits ≤20 ppm thermal hysteresis over temperature cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal - precisely sets ADC reference, DAC bias, or comparator threshold in automotive signal chains. |
| Initial Accuracy | ±0.05% max - ensures <±2.5 mV absolute error at 5 V, reducing calibration burden in BMS and ADAS sensors. |
| Temp Coefficient | 6 ppm/°C max - contributes ≤0.75 mV drift over −40°C to +125°C, critical for wide-temperature traction inverter monitoring. |
| Quiescent Current | 95 µA max - enables multi-year operation in always-on vehicle modules powered by small backup batteries. |
| Output Noise | 3.8 µVPP/V (0.1–10 Hz) - preserves SNR in 16-bit+ data acquisition systems such as on-board charger current sensing. |
| Load Current | ±10 mA - drives multiple downstream op-amps or ADC reference inputs without external buffering. |
| Shutdown Current | 3 µA max - supports ultra-low-power sleep modes in body control modules during vehicle park state. |
| DGK Package | VSSOP-8 (4.00 mm × 4.00 mm) - provides thermal performance (RθJA = 174.1°C/W) and force-sense pin separation for PCB layout robustness. |
Pinout & Package
VSSOP-8 (DGK) package: 4.00 mm × 4.00 mm body size, exposed thermal pad, RoHS-compliant, AEC-Q100 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ENABLE | Input | Active-high logic control: pulls high (>1.6 V) to enable output; pulls low (<0.5 V) to enter 3 µA shutdown mode. |
| 2 - GND_S | Ground | Sense ground connection - returns feedback path for OUT_S to minimize PCB trace IR drop errors. |
| 3 - NIC | No-connect | No internal connection - must be left floating or tied to GND per layout guidelines; not usable as thermal pad anchor. |
| 4 - GND_F | Ground | Force ground connection - carries return current for OUT_F; placed adjacent to OUT_F for Kelvin routing. |
| 5 - IN | Power | Input supply: accepts 5.05 V to 12 V (VOUT + VDO to 12 V); dropout is 500 mV at 10 mA load. |
| 6 - OUT_F | Output | Force output - delivers regulated 5.0 V to load; routed separately from OUT_S to maintain accuracy under varying load currents. |
| 7 - OUT_S | Output | Sense output - connects directly to ADC reference input or feedback node to reject trace resistance effects. |
| 8 - NIC | No-connect | No internal connection - identical function to Pin 3; both NIC pins are electrically isolated and unused. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 | Qualified for −40°C to +125°C ambient operation with HBM ±2500 V / CDM ±1500 V ESD ratings - meets automotive reliability requirements. |
| Force-Sense Output Architecture | Dual OUT_F / OUT_S pins enable true Kelvin connection - eliminates voltage error from PCB trace resistance up to 100 mΩ. |
| Low 1/f Noise | 3.8 µVPP/V (0.1–10 Hz) - minimizes quantization uncertainty in high-resolution SAR and delta-sigma ADCs used in battery cell monitoring. |
| Thermal Hysteresis | ≤20 ppm (Cycle 1) in DGK package - ensures repeatable voltage after thermal cycling in engine bay or powertrain locations. |
| Long-Term Stability | 17 ppm/1000 hrs (DGK) - reduces calibration drift in field-deployed EV chargers and ADAS ECUs over multi-year service life. |
| Enable-Controlled Shutdown | 3 µA max shutdown current with fast 2.5 ms turn-on - supports dynamic power gating in modular vehicle control units. |
Applications
| Body Control Module | Traction Inverter |
|---|---|
Use Scenario: Powering analog front-ends for door lock actuators, lighting drivers, and HVAC sensor interfaces in distributed vehicle networks. IC Role / Device Role / Timing Role: Precision 5.0 V reference for 12-bit ADCs measuring potentiometer position and thermistor-based cabin temperature. Use Value: ±0.05% initial accuracy and 6 ppm/°C drift ensure consistent actuator response across cabin temperature extremes without recalibration. |
Use Scenario: Providing stable reference for current-sense amplifiers and gate driver bias in 400 V/800 V SiC inverter stacks. IC Role / Device Role / Timing Role: Force-sense 5.0 V reference for isolated ΣΔ modulators sampling motor phase currents. Use Value: 3.8 µVPP/V low-frequency noise preserves resolution in 20-bit current measurements critical for torque ripple reduction. |
| Battery Management System | Advanced Driver Assistance System |
Use Scenario: Reference source for cell voltage monitoring ICs in 12S–100S Li-ion packs used in PHEVs and BEVs. IC Role / Device Role / Timing Role: Primary 5.0 V reference for high-side current shunt amplifier and multiplexed cell voltage ADCs. Use Value: 25 ppm/1000 hrs long-term stability reduces BMS SoC estimation drift, extending pack lifetime prediction accuracy. |
Use Scenario: Supplying reference voltage to radar transceiver ADCs and camera ISP analog signal chains in front-corner radar modules. IC Role / Device Role / Timing Role: Low-noise 5.0 V reference for 16-bit ADCs digitizing 77 GHz RF IF signals and image sensor analog outputs. Use Value: Dual force/sense outputs reject PCB noise coupling in compact radar PCBs, maintaining >90 dB SNR at 10 kHz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3450QDBVRQ1 | SOT-23-6 package (2.90 mm × 1.60 mm); no sense pin - single OUT, no force-sense architecture; higher thermal hysteresis (30 ppm). | Suitable for space-constrained, non-Kelvin applications like simple MCU ADC references where trace resistance <10 mΩ. | Select REF3450QDBVRQ1 only when board area is critical and load regulation error tolerance exceeds ±0.5 mV. |
| MAX6070BAUT50+T | 5.0 V, ±0.04% initial accuracy, 3 ppm/°C drift, but no enable pin and only SOT-23-5 package; 12 µA quiescent current. | Used in industrial PLC analog I/O modules requiring tighter drift spec but no shutdown capability or automotive qualification. | Choose MAX6070BAUT50+T for non-automotive, ultra-low-drift applications where continuous operation is mandatory and AEC-Q100 is not required. |
Compared with REF3450QDBVRQ1 and MAX6070BAUT50+T, REF3450QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, force-sense architecture, and sub-4 µA shutdown - enabling high-accuracy, low-power, and thermally robust reference design in safety-critical automotive subsystems.
Availability
REF3450QDGKRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, advanced driver assistance systems, and body control modules requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for REF3450QDGKRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in automotive-grade precision analog components.
The REF34-Q1 product line is designed specifically for high-reliability automotive applications demanding AEC-Q100 qualification, low drift, and low power - targeting battery monitoring, motor control, and ADAS sensor signal conditioning.
FAQ
What is the maximum input voltage for REF3450QDGKRQ1?
The absolute maximum input voltage for REF3450QDGKRQ1 is 13 V, but the recommended operating range is VOUT + VDO (500 mV at 10 mA) up to 12 V. Exceeding 12 V may increase power dissipation and junction temperature beyond safe limits, especially at high ambient temperatures. REF3450QDGKRQ1 maintains regulation down to 5.5 V input under full load.
Does REF3450QDGKRQ1 support Kelvin (force-sense) connections?
Yes, REF3450QDGKRQ1 explicitly supports Kelvin connections via dedicated OUT_F (Pin 6) and OUT_S (Pin 7) pins, along with separate GND_F (Pin 4) and GND_S (Pin 2). This architecture allows precise remote sensing of the reference voltage at the load, rejecting voltage drops across PCB traces and connectors - a key feature confirmed in the DGK package pinout and functional description.
What is the typical turn-on time for REF3450QDGKRQ1?
The typical turn-on time for REF3450QDGKRQ1 is 2.5 ms, defined as the time required for the output to settle within 0.1% of final 5.0 V value after the ENABLE pin transitions from low to high. This specification is measured with CL = 10 µF and applies across the full −40°C to +125°C temperature range, as verified in the Electrical Characteristics table and Figure 8-23.
Is REF3450QDGKRQ1 qualified for automotive safety applications?
Yes, REF3450QDGKRQ1 is AEC-Q100 qualified as Grade 1 (−40°C to +125°C ambient), with documented HBM ±2500 V and CDM ±1500 V ESD ratings. While not ASIL-certified standalone, its qualification supports use in ASIL-B and ASIL-C system designs when integrated with appropriate fault-detection mechanisms - as stated in the official TI device folder and datasheet revision history.
What is the long-term stability specification for REF3450QDGKRQ1?
REF3450QDGKRQ1 exhibits 17 ppm long-term stability over 1000 hours at 35°C when packaged in the DGK (VSSOP-8) variant. This value is measured per JEDEC JESD22-A117 and reflects typical drift behavior - distinct from the 25 ppm spec for the SOT-23-6 version. The DGK package's superior thermal performance contributes to this improved stability metric.
REF3450QDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 6ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3.8µVp-p
- Noise - 10Hz to 10kHz:
- 24µVrms
- Voltage - Input:
- 5.5V ~ 12V
- Current - Supply:
- 95µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
REF3450QDGKRQ1 FAQ
1.How can I place an order for REF3450QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3450QDGKRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for REF3450QDGKRQ1 reliable?
The price and inventory of REF3450QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3450QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for REF3450QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3450QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3450QDGKRQ1?
REF3450QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3450QDGKRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for REF3450QDGKRQ1?
For technical support, including REF3450QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3450QDGKRQ1 requirements.
6.How does Aetrix verify that REF3450QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All REF3450QDGKRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that REF3450QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of REF3450QDGKRQ1?
All REF3450QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF3450QDGKRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The REF3450QDGKRQ1 part is unused and in its original packaging.
Return procedure for REF3450QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3450QDGKRQ1 Tags
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