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Texas Instruments REF2041QDDCRQ1
- Part No.:
- REF2041QDDCRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
REF2041QDDCRQ1.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,132
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Product details
Overview
REF2041QDDCRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual-output voltage reference IC delivering precise VREF = 4.096 V and VBIAS = 2.048 V outputs with ±0.05% initial accuracy, 8 ppm/°C max temperature drift (–40°C to +125°C), ±20 mA bidirectional output current capability, and 10 mV dropout voltage - enabling high-precision ADC biasing and signal conditioning in automotive battery management and motor control systems.
For engineers reviewing the REF2041QDDCRQ1 datasheet, REF2041QDDCRQ1 pinout, REF2041QDDCRQ1 application, or REF2041QDDCRQ1 equivalent, this page delivers verified electrical specifications, SOT23-5 package mapping, functional safety documentation support, VREF/VBIAS tracking performance, and automotive-grade thermal stability data required for production-ready analog front-end design.
Technical Context
The REF2041QDDCRQ1 integrates a precision band-gap core with e-Trim™ package-level calibration to simultaneously generate two thermally matched outputs: VREF (4.096 V) and VBIAS (2.048 V). Its dual-buffer architecture ensures both outputs share identical drift characteristics and track within ±7 ppm/°C over –40°C to +125°C.
It operates from a single supply (VREF + 0.02 V min), supports enable-controlled shutdown (5 µA IQ), and maintains low-noise performance (12 ppmPP 0.1–10 Hz) while sourcing/sinking ±20 mA - making it suitable for high-resolution SAR and delta-sigma ADC reference and biasing in safety-critical automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF Output | 4.096 V ±0.05% - enables 12-bit+ ADC full-scale reference with <±2 LSB error at 25°C |
| VBIAS Output | 2.048 V (VREF / 2) ±0.05% - provides exact mid-rail bias for bipolar input signal conditioning |
| Temp Drift (VREF/VBIAS) | ≤8 ppm/°C (–40°C to +125°C) - limits total error to <±1.2 mV over full automotive temperature range |
| VREF–VBIAS Tracking | ≤7 ppm/°C - ensures differential input offset remains stable across temperature for ratiometric measurements |
| Output Current | ±20 mA per output - supports direct driving of ADC reference inputs and op-amp bias networks without external buffers |
| Dropout Voltage | 10 mV at 20 mA - allows operation from 4.106 V supply, critical for low-voltage battery monitoring |
| Quiescent Current | 360 µA active, 5 µA shutdown - extends runtime in always-on telematics and gateway modules |
Pinout & Package
SOT23-5 package (2.90 mm × 1.60 mm), surface-mount, lead-free, RoHS-compliant, rated for –40°C to +125°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VBIAS | Output | Provides 2.048 V reference/bias voltage; matches VREF drift and accuracy; sinks/sources ±20 mA |
| 2: GND | Reference | Analog ground return for both outputs; must be low-impedance connection to minimize noise coupling |
| 3: EN | Input | Enable control: logic high (≥ VIN – 0.7 V) activates device; logic low places outputs in high-Z shutdown mode |
| 4: VIN | Input | Supply input: minimum 4.106 V (VREF + 10 mV); maximum 5.5 V; powers internal band-gap and buffers |
| 5: VREF | Output | Primary 4.096 V reference output; same drift, accuracy, and load capability as VBIAS; used for ADC VREF input |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, HBM ±2.5 kV, CDM ±1.5 kV - meets automotive reliability requirements |
| e-Trim™ calibration | Package-level trimming after molding minimizes die stress-induced errors - achieves ±0.05% initial accuracy and ≤8 ppm/°C drift |
| VREF/VBIAS tracking | ≤7 ppm/°C matching over temperature - eliminates need for separate references in ratiometric sensor interfaces |
| Low-noise performance | 12 ppmPP (0.1–10 Hz), 0.25 ppm/√Hz at 100 Hz - preserves SNR in 16-bit+ data acquisition systems |
| Stable capacitive loading | 0–10 µF output capacitance range - supports ceramic decoupling without oscillation; simplifies layout |
Applications
| Battery Management Systems | Automotive Gateway |
|---|---|
|
Use Scenario: Monitoring cell voltages and pack current in 48-V mild-hybrid battery packs using isolated ADCs and current shunt amplifiers. IC Role / Device Role / Timing Role: REF2041QDDCRQ1 supplies VREF to 16-bit SAR ADCs and VBIAS to bias differential shunt amplifier outputs for bipolar current sensing. Use Value: Dual-output tracking eliminates mismatch-induced gain error; 8 ppm/°C drift ensures <±0.02% full-scale error over vehicle lifetime. |
Use Scenario: Signal conditioning for CAN FD transceivers, LIN controllers, and diagnostic sensors in centralized vehicle gateways. IC Role / Device Role / Timing Role: REF2041QDDCRQ1 provides stable reference and bias for analog sensor interfaces and ADCs monitoring power rail health and thermal sensors. Use Value: Low 360 µA quiescent current reduces standby power; SOT23-5 footprint saves PCB area in space-constrained gateway modules. |
| Inverter & Motor Control | On-Board Chargers (OBC) |
|
Use Scenario: High-accuracy phase current sampling in traction inverters using isolated sigma-delta modulators and digital filters. IC Role / Device Role / Timing Role: REF2041QDDCRQ1 delivers matched VREF/VBIAS to dual-channel modulator reference inputs for synchronized current reconstruction. Use Value: ≤7 ppm/°C VREF–VBIAS tracking ensures consistent modulation accuracy across temperature - critical for torque ripple reduction. |
Use Scenario: Precision voltage and current measurement in bi-directional AC/DC converters for EV charging systems. IC Role / Device Role / Timing Role: REF2041QDDCRQ1 supplies reference and bias to isolated ADCs measuring grid-side and battery-side parameters. Use Value: 10 mV dropout enables operation from low-headroom auxiliary rails; ±20 mA drive supports multiple ADC inputs without buffering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF2030QDDCRQ1 | VREF = 3.0 V, VBIAS = 1.5 V; otherwise identical specs (drift, accuracy, package, AEC-Q100) | Used where 3.0-V ADC full-scale or 1.5-V bias is required - not drop-in for 4.096-V systems | Select when system ADC reference voltage is 3.0 V and board layout allows same SOT23-5 footprint |
| REF2025QDDCRQ1 | VREF = 2.5 V, VBIAS = 1.25 V; same AEC-Q100 Grade 1 rating and tracking performance | Optimized for 2.5-V rail systems and legacy 12-bit ADCs requiring lower reference voltage | Choose for cost-sensitive designs needing 2.5-V reference; verify compatibility with existing 4.096-V firmware scaling |
Compared with REF2030QDDCRQ1 and REF2025QDDCRQ1, REF2041QDDCRQ1 provides the only 4.096-V option in the family - matching standard 12-bit full-scale ADC codes (4096 steps), eliminating software scaling overhead in new automotive ECU designs.
Availability
REF2041QDDCRQ1 is available at Aetrix Electronics and suitable for battery management systems, automotive gateways, and on-board chargers requiring stable component supply under AEC-Q100 automotive qualification.
Supply support for REF2041QDDCRQ1 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 leader specializing in analog and embedded processing technologies, with decades of automotive-grade product development and manufacturing expertise.
The REF20xx-Q1 product line is designed specifically for high-precision, dual-output voltage referencing in automotive signal chains - targeting ADC biasing, current sensing, and sensor interface applications demanding AEC-Q100 compliance and long-term stability.
FAQ
What is the output voltage specification of REF2041QDDCRQ1?
The REF2041QDDCRQ1 provides two precisely matched outputs: VREF = 4.096 V ±0.05% and VBIAS = 2.048 V ±0.05%, both guaranteed over –40°C to +125°C ambient temperature. These values are factory-trimmed using e-Trim™ technology to ensure tight initial accuracy and low temperature drift, making REF2041QDDCRQ1 ideal for 12-bit ADC full-scale referencing and mid-rail biasing in automotive systems.
Does REF2041QDDCRQ1 support bidirectional output current?
Yes, REF2041QDDCRQ1 supports ±20 mA output current on both VREF and VBIAS pins - meaning each output can source up to 20 mA or sink up to 20 mA. This bidirectional capability allows direct interfacing with op-amp inputs, ADC reference pins, and current-sense amplifier bias networks without external buffers, and is fully specified across the –40°C to +125°C temperature range.
How does the VREF/VBIAS tracking performance benefit system accuracy?
REF2041QDDCRQ1 guarantees VREF and VBIAS tracking within ±7 ppm/°C over –40°C to +125°C. This means the ratio VREF / VBIAS remains stable at exactly 2.000 across temperature, eliminating gain error in ratiometric circuits such as differential shunt amplifier interfaces. As a result, REF2041QDDCRQ1 reduces calibration complexity and improves long-term measurement fidelity in battery monitoring and motor control applications.
What is the minimum input supply voltage required for REF2041QDDCRQ1?
The minimum input supply voltage (VIN) for REF2041QDDCRQ1 is VREF + 0.02 V = 4.116 V under no-load conditions, but the 10 mV dropout specification means it can operate down to 4.106 V at 20 mA load. This ultra-low dropout enables reliable operation from tightly regulated auxiliary rails in automotive ECUs, especially during cold-crank conditions where supply voltage sags near 4.1 V.
Is REF2041QDDCRQ1 qualified for automotive use?
Yes, REF2041QDDCRQ1 is AEC-Q100 qualified as Grade 1 (–40°C to +125°C ambient), with HBM ESD rating of ±2.5 kV and CDM rating of ±1.5 kV. It also includes functional safety documentation support per ISO 26262, making REF2041QDDCRQ1 suitable for ASIL-B/C automotive subsystems including battery management, power steering, and on-board chargers.
REF2041QDDCRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V, 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 8ppm/°C
- Noise - 0.1Hz to 10Hz:
- 12ppmp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.116V ~ 5.5V
- Current - Supply:
- 460µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
REF2041QDDCRQ1 FAQ
1.How can I place an order for REF2041QDDCRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF2041QDDCRQ1 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 REF2041QDDCRQ1 reliable?
The price and inventory of REF2041QDDCRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF2041QDDCRQ1 is usually 5 days.
3.What payment methods are accepted for REF2041QDDCRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF2041QDDCRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF2041QDDCRQ1?
REF2041QDDCRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF2041QDDCRQ1 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 REF2041QDDCRQ1?
For technical support, including REF2041QDDCRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF2041QDDCRQ1 requirements.
6.How does Aetrix verify that REF2041QDDCRQ1 is sourced from the original manufacturer or authorized distributors?
All REF2041QDDCRQ1 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 REF2041QDDCRQ1 meets industry standards.
7.What is the process for return or replacement of REF2041QDDCRQ1?
All REF2041QDDCRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF2041QDDCRQ1, 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 REF2041QDDCRQ1 part is unused and in its original packaging.
Return procedure for REF2041QDDCRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF2041QDDCRQ1 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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