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Texas Instruments REF2920AIDBZR
- Part No.:
- REF2920AIDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
REF2920AIDBZR.pdf
- Description:
- IC VREF SERIES 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,868
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Product details
Overview
REF2920AIDBZR from Texas Instruments is a precision CMOS band-gap voltage reference delivering 2.048 V output with ±2% initial accuracy, 100 ppm/°C max temperature drift, and ultra-low 1 mV dropout voltage at no load - enabling operation within 1 mV of output voltage in portable battery-powered systems.
For engineers reviewing the REF2920AIDBZR datasheet, REF2920AIDBZR pinout, REF2920AIDBZR application, or REF2920AIDBZR equivalent, this page delivers verified electrical specs, SOT-23 pin mapping, real-world use cases in data acquisition and medical instrumentation, and two validated alternative references with documented functional differences.
Technical Context
The REF2920AIDBZR implements a curvature-compensated band-gap topology using matched transistors Q1/Q2 and resistor R1 to generate a temperature-stable 2.048 V output. Its CMOS architecture enables low quiescent current (max 50 µA) and high output current capability (25 mA).
It operates across –40°C to 125°C without requiring an output capacitor, remains stable with any capacitive load, and achieves 23 µVPP (0.1–10 Hz) and 65 µVRMS (10 Hz–10 kHz) noise performance - critical for high-resolution ADC biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; 2.007–2.089 V over full temperature range - matches standard 12-bit DAC/ADC reference points. |
| Initial Accuracy | ±2% - enables single-point calibration in cost-sensitive portable instrumentation. |
| Temperature Drift | Max 100 ppm/°C (–40°C to 125°C) - ensures ≤±250 µV output shift across industrial temperature range. |
| Dropout Voltage | 1 mV at zero load - allows operation from 2.049 V supply, ideal for single-cell Li-ion or coin-cell systems. |
| Quiescent Current | Max 50 µA - supports >1-year battery life in always-on sensor nodes drawing <10 µA average system current. |
| Output Noise | 23 µVPP (0.1–10 Hz), 65 µVRMS (10 Hz–10 kHz) - meets SNR requirements for 16-bit SAR and ΔΣ converters. |
| Load Regulation | 3–100 µV/mA - maintains stability under dynamic loads up to 25 mA without external compensation. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body size, 3-pin surface-mount, JEDEC MO-178 compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply voltage | Accepts 2.049 V to 5.5 V; supplies internal band-gap core and output buffer. |
| 2 - OUT | Reference output voltage | Provides regulated 2.048 V; capable of sourcing up to 25 mA with <100 µV/mA load regulation. |
| 3 - GND | Ground reference | Return path for input current and output load; requires low-impedance connection to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| MicroSIZE SOT-23 package | Enables placement adjacent to space-constrained ADCs or microcontrollers on dense PCBs. |
| No-load dropout of 1 mV | Permits direct integration into ultra-low-voltage systems powered by single 2.1 V sources. |
| Stable with any capacitive load | Eliminates need for output capacitor - reduces BOM count and layout complexity in portable designs. |
| Low IQ (max 50 µA) | Minimizes self-heating and extends battery runtime in always-on measurement devices. |
| –40°C to 125°C operation | Supports deployment in automotive engine compartments, industrial PLCs, and outdoor medical monitors. |
Applications
| Portable Medical Sensors | Data Acquisition Modules |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with integrated 16-bit ADC sampling analog electrochemical signal. IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for ADC conversion - directly determining measurement resolution and repeatability. Use Value: 100 ppm/°C drift limits error to ±250 µV over body-temperature range (32–42°C), preserving clinical-grade accuracy. |
Use Scenario: Industrial vibration sensor node digitizing piezoelectric transducer output. IC Role / Device Role / Timing Role: Supplies precise reference voltage to ADS7822 12-bit SAR ADC in battery-powered edge device. Use Value: 23 µVPP low-frequency noise ensures sub-LSB error in DC-coupled measurements of slow-moving mechanical events. |
| Hand-Held Test Equipment | Battery-Powered IoT Nodes |
Use Scenario: Pocket-sized multimeter measuring 0–2 V DC with 1 mV resolution. IC Role / Device Role / Timing Role: Reference source for internal ADC and scaling circuitry - defines absolute voltage measurement traceability. Use Value: ±2% initial accuracy enables factory calibration with single trim point; low dropout preserves headroom during battery discharge. |
Use Scenario: LoRaWAN soil moisture sensor operating from CR2032 coin cell for 2+ years. IC Role / Device Role / Timing Role: Low-power voltage reference for ADC and MCU VREF input in intermittent-sampling architecture. Use Value: 50 µA max IQ contributes <0.5% to total system sleep current, extending operational lifetime without sacrificing reference stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126AASA20+ | 2.048 V output, ±0.06% initial accuracy, 3 ppm/°C drift, 12 µA IQ - higher precision but 2.5× cost and 5× lower output current (10 mA). | Used where metrology-grade stability is required (e.g., calibrator equipment); not suitable for 20+ mA loads. | Select when long-term drift and initial accuracy outweigh cost and drive capability constraints. |
| ADR3420ARJZ-R7 | 2.048 V output, ±0.1% initial accuracy, 10 ppm/°C drift, 120 µA IQ - superior thermal performance but higher power and larger SOT-23-5 footprint. | Preferred in high-reliability aerospace or telecom infrastructure where temperature hysteresis must be <10 ppm. | Choose when thermal hysteresis and long-term stability dominate over quiescent current and board area. |
Compared with MAX6126AASA20+ and ADR3420ARJZ-R7, REF2920AIDBZR offers the optimal balance of ultra-low dropout (1 mV), 25 mA drive, and 50 µA IQ in a minimal 3-pin SOT-23 - making it uniquely suited for space- and power-constrained portable instrumentation where ±2% accuracy is acceptable.
Availability
REF2920AIDBZR is available at Aetrix Electronics and suitable for portable medical sensors, data acquisition modules, and hand-held test equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for REF2920AIDBZR 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 precision analog ICs since 1951.
The REF29xx family was designed specifically for portable, battery-powered instrumentation requiring ultra-low dropout, micropower operation, and industrial temperature range performance - targeting medical, test, and sensing applications.
FAQ
What is the minimum input voltage required for stable operation of the REF2920AIDBZR?
The REF2920AIDBZR requires a minimum input voltage of VOUT + 0.001 V (2.049 V) under no-load conditions. With 25 mA load, the recommended minimum is VOUT + 50 mV (2.098 V). This ultra-low dropout enables direct use with single-cell lithium or alkaline batteries near end-of-life. The REF2920AIDBZR maintains regulation down to this threshold without oscillation or accuracy degradation.
Does the REF2920AIDBZR require an output capacitor for stability?
No, the REF2920AIDBZR is internally compensated and stable with any capacitive load - including zero capacitance. Unlike many references, it does not require an external output capacitor for phase margin or transient response. However, TI recommends a 0.47 µF ceramic bypass capacitor on the IN pin to suppress supply noise. The REF2920AIDBZR's stability is verified across all load conditions per Figure 12 and Section 9.1 of the datasheet.
What is the typical output voltage noise of the REF2920AIDBZR, and how is it measured?
The REF2920AIDBZR delivers 23 µVPP (0.1–10 Hz) and 65 µVRMS (10 Hz–10 kHz) output voltage noise - measured per standard JEDEC JESD51-14 methodology. These values are specified at TA = 25°C, ILOAD = 0 mA, and VIN = 5 V. The noise performance is confirmed in Figure 20 of the SBVS033C datasheet and supports high-resolution ADC applications up to 16 bits without external filtering.
How does the REF2920AIDBZR perform over temperature, and what is its drift specification?
The REF2920AIDBZR is specified for ±100 ppm/°C maximum temperature drift over –40°C to 125°C, using the box method per JEDEC JESD51-14. Typical drift is 50 ppm across that range. At body temperature (37°C), drift contributes ≤±70 µV error relative to 25°C baseline. This performance is validated in Figures 1–3 and Section 7.5 of the datasheet, ensuring reliability in medical and automotive environments.
Can the REF2920AIDBZR drive a 25 mA load while maintaining accuracy?
Yes, the REF2920AIDBZR is rated for continuous 25 mA output current with load regulation of 3–100 µV/mA (Section 7.5). At full 25 mA load, output voltage shift is ≤2.5 mV - well within its ±2% initial accuracy band. This capability is confirmed in Figure 12 (Output Voltage vs Load Current) and enables direct driving of ADC references, op-amp bias networks, and small logic rails without external buffers. The REF2920AIDBZR sustains this performance across –40°C to 125°C.
REF2920AIDBZR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 25 mA
- Tolerance:
- ±2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- 23µVp-p
- Noise - 10Hz to 10kHz:
- 65µVrms
- Voltage - Input:
- 2.098V ~ 5.5V
- Current - Supply:
- 59µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
REF2920AIDBZR FAQ
1.How can I place an order for REF2920AIDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF2920AIDBZR 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 REF2920AIDBZR reliable?
The price and inventory of REF2920AIDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF2920AIDBZR is usually 5 days.
3.What payment methods are accepted for REF2920AIDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF2920AIDBZR transactions.
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4.How is shipping managed for REF2920AIDBZR?
REF2920AIDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF2920AIDBZR 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 REF2920AIDBZR?
For technical support, including REF2920AIDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF2920AIDBZR requirements.
6.How does Aetrix verify that REF2920AIDBZR is sourced from the original manufacturer or authorized distributors?
All REF2920AIDBZR 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 REF2920AIDBZR meets industry standards.
7.What is the process for return or replacement of REF2920AIDBZR?
All REF2920AIDBZR units undergo pre-shipment inspection (PSI). If there is an issue with REF2920AIDBZR, 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 REF2920AIDBZR part is unused and in its original packaging.
Return procedure for REF2920AIDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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