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Texas Instruments REF2041AIDDCT
- Part No.:
- REF2041AIDDCT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
REF2041AIDDCT.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,665
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Product details
Overview
REF2041AIDDCT from Texas Instruments is a dual-output, low-drift precision voltage reference IC providing VREF = 4.096 V and VBIAS = 2.048 V with ±0.05% initial accuracy and 8 ppm/°C max temperature drift over –40°C to 125°C. It delivers ±20 mA output current, 10 mV dropout, and 360 µA quiescent current in a SOT-23-5 package-enabling high-accuracy biasing of bipolar ADC inputs in single-supply industrial metering and instrumentation systems.
For engineers reviewing the REF2041AIDDCT datasheet, REF2041AIDDCT pinout, REF2041AIDDCT application, or REF2041AIDDCT equivalent, key selection criteria include dual-rail tracking performance (±7 ppm/°C VREF–2×VBIAS drift), microsize SOT-23-5 footprint, low-input-voltage operation down to VREF + 20 mV, and compatibility with battery-powered or space-constrained signal chains requiring stable 4.096 V/2.048 V references.
Technical Context
The REF2041AIDDCT integrates a band-gap core with two independent e-Trim™-calibrated output buffers-one for VREF and one for VBIAS-ensuring matched initial accuracy and temperature coefficient across both outputs. Its architecture enables precise VBIAS = VREF / 2 generation without external resistors.
It features enable-controlled shutdown (EN ≥ VIN – 0.7 V), operates from VREF + 0.02 V input, and maintains <600 µs turn-on settling time with 1 µF load capacitance. Both outputs source and sink ±20 mA while exhibiting identical electrical characteristics-including line regulation (3 ppm/V), load regulation (8 ppm/mA), and PSRR >80 dB at 100 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF Output | 4.096 V ±0.05% - matches common 12-bit ADC full-scale reference and enables exact binary scaling |
| VBIAS Output | 2.048 V ±0.05% - precisely half of VREF for mid-rail biasing of differential analog inputs |
| Temp Drift (VREF/VBIAS) | ±8 ppm/°C max (–40°C to 125°C) - ensures <±1.0 mV total drift over full industrial range |
| VREF–VBIAS Tracking | ±7 ppm/°C max (–40°C to 125°C) - guarantees VREF remains within ±35 ppm of exactly 2×VBIAS across temperature |
| Quiescent Current | 360 µA typical - supports ultra-low-power operation in battery-backed or energy-harvested systems |
| Dropout Voltage | 10 mV at 20 mA - allows operation from supply rails as low as 4.106 V, critical for low-voltage battery systems |
| Output Current | ±20 mA per output - drives ADC reference inputs, op-amp bias networks, and small DAC loads directly |
Pinout & Package
SOT-23-5 package (2.90 mm × 1.60 mm body), surface-mount, matte-tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VBIAS | Output | Provides 2.048 V reference/bias voltage; electrically identical to VREF in accuracy, drift, and drive capability |
| 2 - GND | Reference | Analog ground return for both outputs; must be low-impedance and separated from digital ground |
| 3 - EN | Input | Enable control: device active when EN ≥ VIN – 0.7 V; pulls to GND for shutdown (3.3 µA ISHDN) |
| 4 - VIN | Input | Supply input (4.106 V min); powers internal band-gap and buffers; supports up to 5.5 V |
| 5 - VREF | Output | Primary 4.096 V reference output; used for ADC VREF, DAC reference, or system calibration |
Key Features
| Feature | Design Value |
|---|---|
| Dual matched outputs | VREF and VBIAS share identical ±0.05% accuracy and ±8 ppm/°C drift-eliminates need for discrete resistor dividers and matching components |
| e-Trim™ calibration | Factory-trimmed at package level after molding-minimizes stress-induced errors and improves long-term stability vs die-level trim |
| VREF–VBIAS tracking | ±6 ppm/°C max over –40°C to 85°C-enables high-fidelity differential signal conditioning without recalibration |
| Low-noise performance | 12 ppmPP (0.1–10 Hz), 0.25 ppm/√Hz noise density-supports 16+ bit precision measurement without external filtering |
| Stable with 0–10 µF capacitive load | No external compensation required-simplifies layout and supports ceramic output caps for fast transient response |
Applications
| Electricity Meter | Analog Input Module |
|---|---|
|
Use Scenario: High-accuracy energy measurement using 24-bit sigma-delta ADCs with bipolar current/voltage sensing. IC Role / Device Role / Timing Role: Provides 4.096 V ADC reference and 2.048 V mid-rail bias for shunt-based current sensing front-end. Use Value: Enables ±0.1% meter accuracy over –25°C to 70°C ambient by maintaining sub-10 ppm/°C VREF–2×VBIAS tracking error. |
Use Scenario: Industrial PLC analog input card acquiring ±10 V sensor signals with 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Supplies precision VREF for ADC and VBIAS for op-amp level-shifting circuitry driving differential ADC inputs. Use Value: Reduces board area and BOM count by replacing dual discrete references; eliminates resistor-matching drift errors. |
| Servo Drive Control | Clinical Digital Thermometer |
|
Use Scenario: Closed-loop motor control with isolated current sensing and real-time torque feedback. IC Role / Device Role / Timing Role: Generates stable 4.096 V reference for isolation amplifier feedback path and 2.048 V bias for differential ADC interface. Use Value: Maintains <±0.02% gain stability over motor housing temperature swings (–40°C to 125°C junction). |
Use Scenario: Medical-grade contact thermometer using thermistor bridge with 20-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Delivers ultra-stable 4.096 V reference and 2.048 V bias for ratiometric bridge excitation and ADC conversion. Use Value: Achieves ±0.05°C measurement accuracy over 0°C–50°C patient range via <15 ppm total drift contribution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF2030AIDDCT | VREF = 3.0 V, VBIAS = 1.5 V; otherwise identical specs (±0.05%, 8 ppm/°C, SOT-23-5) | Used where 3.0 V ADC full-scale or 1.5 V bias is required-e.g., 3.3 V system rails with margin | Select when system ADC reference voltage is 3.0 V instead of 4.096 V; pin-compatible drop-in replacement |
| ADR4540BRZ | Single 4.096 V output, ±0.02% initial accuracy, 2 ppm/°C drift, SOIC-8; no VBIAS output | Requires external precision divider for mid-rail bias; higher accuracy but larger footprint and no tracking guarantee | Choose when ultimate drift performance is prioritized over dual-output convenience and board space |
Compared with REF2030AIDDCT, REF2041AIDDCT provides higher-resolution ADC scaling (4.096 V = 212 mV); compared with ADR4540BRZ, it delivers integrated VBIAS tracking at lower cost and smaller size-but trades 2 ppm/°C drift for 8 ppm/°C to achieve dual-output functionality in SOT-23-5.
Availability
REF2041AIDDCT is available at Aetrix Electronics and suitable for electricity metering, analog I/O modules, and clinical instrumentation requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for REF2041AIDDCT 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 expertise in precision reference design and high-reliability manufacturing.
The REF20xx family was developed specifically for industrial and medical applications demanding dual-rail, low-drift, low-power voltage references in minimal footprints-addressing the need for accurate bipolar signal conditioning in single-supply systems.
FAQ
What is the maximum operating temperature range for the REF2041AIDDCT?
The REF2041AIDDCT is fully specified from –40°C to +125°C ambient temperature. All key parameters-including output voltage accuracy, temperature drift (±8 ppm/°C), VREF–VBIAS tracking (±7 ppm/°C), and quiescent current-are guaranteed across this extended industrial range, making REF2041AIDDCT suitable for harsh-environment applications like motor drives and outdoor metering.
Does the REF2041AIDDCT require an external capacitor on its outputs?
No, the REF2041AIDDCT is internally compensated and stable with output capacitors from 0 µF to 10 µF. Unlike many references, it does not require a minimum ESR or specific capacitor type-enabling use of low-ESR ceramic capacitors for optimal transient response without risk of oscillation. This simplifies layout and improves reliability in space-constrained designs.
How does the enable (EN) pin function on the REF2041AIDDCT?
The EN pin on REF2041AIDDCT controls power state: when EN ≥ VIN – 0.7 V, the device operates in active mode (360 µA IQ); when EN < VIN – 0.7 V, it enters shutdown mode drawing only 3.3 µA. No pull-up or pull-down is required-EN can be driven directly from a GPIO or open-drain controller output, enabling low-power duty-cycled operation in battery systems.
Can the REF2041AIDDCT drive a 20 mA load on both outputs simultaneously?
Yes, REF2041AIDDCT is rated for ±20 mA output current on each output (VREF and VBIAS) independently. Both outputs maintain full specification compliance-including accuracy, drift, and noise-under simultaneous sourcing or sinking at rated load. This enables direct driving of ADC reference pins, op-amp bias networks, and small DACs without external buffers.
What is the long-term stability specification for the REF2041AIDDCT?
The REF2041AIDDCT exhibits 25 ppm typical long-term stability over the first 1000 hours of operation at 35°C, measured per JEDEC JESD22-A117. This value reflects real-world soldered-board behavior-not accelerated test conditions-and contributes predictably to total system error budget in applications requiring multi-year calibration intervals, such as utility meters and medical devices.
REF2041AIDDCT 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
REF2041AIDDCT FAQ
1.How can I place an order for REF2041AIDDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for REF2041AIDDCT 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 REF2041AIDDCT reliable?
The price and inventory of REF2041AIDDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF2041AIDDCT is usually 5 days.
3.What payment methods are accepted for REF2041AIDDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF2041AIDDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF2041AIDDCT?
REF2041AIDDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF2041AIDDCT 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 REF2041AIDDCT?
For technical support, including REF2041AIDDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF2041AIDDCT requirements.
6.How does Aetrix verify that REF2041AIDDCT is sourced from the original manufacturer or authorized distributors?
All REF2041AIDDCT 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 REF2041AIDDCT meets industry standards.
7.What is the process for return or replacement of REF2041AIDDCT?
All REF2041AIDDCT units undergo pre-shipment inspection (PSI). If there is an issue with REF2041AIDDCT, 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 REF2041AIDDCT part is unused and in its original packaging.
Return procedure for REF2041AIDDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF2041AIDDCT Tags
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