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Texas Instruments REF3430QDGKRQ1
- Part No.:
- REF3430QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REF3430QDGKRQ1.pdf
- Description:
- IC VREF SERIES 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,582
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Product details
Overview
REF3430QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified, low-drift (≤6 ppm/°C), low-power (≤95 μA) CMOS voltage reference delivering a precise 3.0 V output with ±0.05% initial accuracy and ±10 mA sourcing/sinking capability. It operates across −40°C to +125°C and features enable-controlled shutdown (≤3 μA), making it suitable for high-resolution ADC biasing in automotive battery management systems.
For engineers reviewing the REF3430QDGKRQ1 datasheet, REF3430QDGKRQ1 pinout, REF3430QDGKRQ1 application, or REF3430QDGKRQ1 equivalent, key selection criteria include output stability under thermal cycling (≤20 ppm hysteresis, Cycle 1, DGK package), low 0.1–10 Hz noise (3.8 µVPP/V), and force-sense output architecture enabling accurate remote sensing in noisy automotive power domains.
Technical Context
The REF3430QDGKRQ1 implements a precision bandgap core with buffered force-sense output topology, separating output current delivery (OUT_F) from voltage sensing (OUT_S) to minimize PCB trace IR drop errors. Its enable pin controls active/shutdown modes with defined logic thresholds (EN ≥1.6 V for active, ≤0.5 V for shutdown).
It uses a box-method temperature coefficient specification (≤6 ppm/°C over −40°C to +125°C), achieves ≤30 ppm thermal hysteresis after first temperature cycle in the DGK package, and maintains load regulation of ≤43 ppm/mA (sinking) and ≤20 ppm/mA (sourcing) at full ±10 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal; fixed, factory-trimmed value with no external adjustment required. |
| Initial Accuracy | ±0.05% max at 25°C; ensures <±1.5 mV absolute error before system calibration. |
| Temp Coefficient | ≤6 ppm/°C max; contributes ≤0.9 mV drift over full −40°C to +125°C range. |
| Quiescent Current | ≤95 μA max over temperature; enables >10-year battery life in always-on vehicle modules. |
| Output Noise | 3.8 µVPP/V (0.1–10 Hz); supports 18+ bit ADC performance without additional filtering. |
| Shutdown Current | ≤3 μA max; reduces system standby power by >96% vs active mode. |
| Load Current | ±10 mA; sufficient to drive multiple SAR ADC references or op-amp bias networks. |
| Long-Term Stability | 17 ppm/1000 hrs (DGK package); predictable aging behavior for safety-critical lifetime modeling. |
Pinout & Package
REF3430QDGKRQ1 is packaged in an 8-pin VSSOP (DGK) with 4.00 mm × 4.00 mm body size and exposed thermal pad. The force-sense architecture requires separate routing of OUT_F (power delivery) and OUT_S (voltage sensing) to maintain accuracy under load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ENABLE | Input control | Active-high logic input; ≥1.6 V enables reference, ≤0.5 V places device in 3 μA shutdown. |
| 2 - GND_S | Ground sense | Low-impedance return path for OUT_S; must connect near load to reject ground bounce. |
| 3 - NIC | No internal connection | Unbonded pin; must remain floating or tied to GND per layout guidelines. |
| 4 - GND_F | Ground force | High-current return for OUT_F; connects to main power ground plane for thermal dissipation. |
| 5 - IN | Power input | Accepts 3.05 V to 12 V supply; dropout as low as 50 mV at zero load. |
| 6 - OUT_S | Voltage sense output | High-impedance feedback node; connects directly to ADC VREF+ or controller reference input. |
| 7 - OUT_F | Current delivery output | Low-impedance source/sink node; drives load current while OUT_S monitors true voltage. |
| 8 - NIC | No internal connection | Unbonded pin; must remain floating or tied to GND per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation with HBM ±2500 V and CDM ±1500 V ESD robustness. |
| Force-sense output architecture | Separates OUT_F (load current path) and OUT_S (precision sensing) to eliminate PCB trace resistance error. |
| Ultra-low 0.1–10 Hz noise | 3.8 µVPP/V enables direct interface to 18-bit+ SAR ADCs without post-regulation filtering. |
| Thermal hysteresis control | ≤20 ppm (Cycle 1) in DGK package ensures repeatable voltage after thermal cycling in engine bay environments. |
| Stable capacitive loading | Operates with 0.1–10 µF output capacitance; compatible with standard ceramic decoupling without oscillation risk. |
| Solder heat shift performance | Typical post-reflow shift <±0.01%; validated for single- and dual-sided automotive PCB assembly. |
Applications
| Body Control Module | On-Board Charger |
|---|---|
Use Scenario: Monitoring 12 V battery voltage and load currents via isolated ADCs in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for ADS7828-Q1 12-bit ADCs measuring analog sensor signals. Use Value: ±0.05% initial accuracy and ≤6 ppm/°C drift ensure consistent voltage measurement across cabin temperature extremes. |
Use Scenario: Biasing precision current-sense amplifiers and isolation ADCs in bidirectional AC/DC conversion stages. IC Role / Device Role / Timing Role: Supplies regulated 3.0 V reference to ADS112U04-Q1 for shunt-based DC-link current monitoring. Use Value: Force-sense outputs reject ground noise from high di/dt switching nodes, maintaining <0.1% measurement linearity. |
| Traction Inverter | Battery Management System |
Use Scenario: Calibrating gate driver bias supplies and temperature-sensing circuits in high-voltage motor control units. IC Role / Device Role / Timing Role: Delivers low-noise 3.0 V reference to TMS320F28379D ADC inputs for real-time IGBT junction temperature estimation. Use Value: 3.8 µVPP/V noise floor prevents quantization dither in high-gain thermistor signal chains. |
Use Scenario: Providing reference voltage for cell voltage monitoring ICs (e.g., BQ79616-Q1) in 400 V EV battery packs. IC Role / Device Role / Timing Role: Serves as primary reference for 16-bit delta-sigma ADCs measuring individual Li-ion cell voltages. Use Value: 17 ppm/1000 hrs long-term stability supports ASIL-D functional safety requirements for voltage drift monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3430QDBVRQ1 | 6-pin SOT-23 package; no sense pins; single OUT, GND; higher thermal resistance (122.6°C/W). | Lacks force-sense architecture; unsuitable for high-accuracy remote sensing; better for space-constrained, low-cost modules. | Select when board area is critical and load regulation <±50 ppm/mA is acceptable. |
| LM4132QMFE-3.0/NOPB | Fixed 3.0 V; ±0.1% initial accuracy; 20 ppm/°C tempco; no enable pin; 100 μA quiescent current. | No shutdown mode; higher drift and accuracy tolerance; not AEC-Q100 Grade 1 qualified. | Select only for non-safety-critical industrial applications where automotive qualification is not required. |
Compared with REF3430QDBVRQ1, REF3430QDGKRQ1 provides superior accuracy retention under thermal stress and load variation due to its force-sense topology and lower hysteresis. Versus LM4132QMFE-3.0/NOPB, it delivers tighter initial accuracy, lower drift, integrated enable control, and full AEC-Q100 Grade 1 compliance for automotive deployment.
Availability
REF3430QDGKRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and advanced driver assistance systems requiring stable component supply across extended temperature ranges and automotive lifecycle demands.
Supply support for REF3430QDGKRQ1 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 robust noise performance in harsh thermal and electrical environments.
FAQ
What is the maximum input voltage for REF3430QDGKRQ1?
The absolute maximum input voltage for REF3430QDGKRQ1 is 13 V, but the recommended operating maximum is 12 V per the datasheet's Recommended Operating Conditions table. Exceeding 12 V may increase power dissipation and thermal stress without providing functional benefit, as the device operates correctly down to VOUT + VDO (50 mV typical at zero load). Always observe derating curves in high-temperature environments.
Does REF3430QDGKRQ1 support reverse current flow on its output?
Yes, REF3430QDGKRQ1 supports bidirectional output current: it can both source and sink up to ±10 mA continuously. This capability is explicitly specified in Section 7.5 Electrical Characteristics under "IL Output current capacity" and enables use in active filter biasing, op-amp level-shifting, and precision current-source/sink configurations without external circuitry.
How does the force-sense architecture of REF3430QDGKRQ1 improve accuracy?
The force-sense architecture separates OUT_F (high-current output path) from OUT_S (high-impedance voltage sense node). By routing OUT_S directly to the load's reference input-bypassing PCB trace resistance-the REF3430QDGKRQ1 eliminates IR drop errors that would otherwise degrade effective accuracy, especially under dynamic load conditions common in automotive power domains.
What is the thermal hysteresis performance of REF3430QDGKRQ1?
REF3430QDGKRQ1 exhibits ≤20 ppm thermal hysteresis after the first temperature cycle (−40°C → +125°C → 25°C) in the DGK package, as characterized in Section 7.5 and Figure 8-19. This low hysteresis ensures repeatable output voltage upon repeated thermal excursions, critical for calibration stability in engine control units and battery monitoring systems.
Is REF3430QDGKRQ1 compatible with ceramic output capacitors?
Yes, REF3430QDGKRQ1 is stable with ceramic output capacitors ranging from 0.1 µF to 10 µF, as confirmed in Section 7.5 "Capacitive Load" and Figure 8-10 through 8-13 load transient waveforms. No series resistance or specialized capacitor types are required, simplifying layout and reducing BOM count in space-constrained automotive modules.
REF3430QDGKRQ1 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 6ppm/°C
- Noise - 0.1Hz to 10Hz:
- 5µVp-p
- Noise - 10Hz to 10kHz:
- 24µVrms
- Voltage - Input:
- 3.5V ~ 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
REF3430QDGKRQ1 FAQ
1.How can I place an order for REF3430QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3430QDGKRQ1 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 REF3430QDGKRQ1 reliable?
The price and inventory of REF3430QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3430QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for REF3430QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3430QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3430QDGKRQ1?
REF3430QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3430QDGKRQ1 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 REF3430QDGKRQ1?
For technical support, including REF3430QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3430QDGKRQ1 requirements.
6.How does Aetrix verify that REF3430QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All REF3430QDGKRQ1 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 REF3430QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of REF3430QDGKRQ1?
All REF3430QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF3430QDGKRQ1, 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 REF3430QDGKRQ1 part is unused and in its original packaging.
Return procedure for REF3430QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3430QDGKRQ1 Tags
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LM4040DIM3X-2.5/NOPB
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