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Texas Instruments REF2920AIDBZT
- Part No.:
- REF2920AIDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
REF2920AIDBZT.pdf
- Description:
- IC VREF SERIES 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:833
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Product details
Overview
REF2920AIDBZT 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 over –40°C to 125°C, and ultra-low 1 mV dropout at no load. It operates from supply voltages as low as VOUT + 0.001 V and supports up to 25 mA output current-ideal for high-accuracy ADC biasing in portable instrumentation.
For engineers reviewing the REF2920AIDBZT datasheet, REF2920AIDBZT pinout, REF2920AIDBZT application, or REF2920AIDBZT equivalent, key selection criteria include its SOT-23-3 package footprint, 50 µA max quiescent current, 23 µVPP (0.1–10 Hz) noise performance, and compatibility with capacitive loads without external compensation.
Technical Context
The REF2920AIDBZT implements a curvature-compensated band-gap topology using two transistors with mismatched current densities to generate a PTAT voltage across a resistor, summed with a CTAT base-emitter voltage to achieve near-zero thermal coefficient. Its CMOS design enables rail-to-rail operation down to 1 mV headroom.
It features intrinsic stability with any capacitive load-including zero-output-capacitor operation-and delivers 25 mA output while maintaining <100 ppm/°C drift and <2% initial error across industrial temperature range. Load regulation is specified at 3–100 µV/mA under force-sense measurement conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; 2.007–2.089 V over –40°C to 125°C - defines precise scaling for 12-bit DACs and SAR ADCs requiring 2.048 V full-scale reference. |
| Initial Accuracy | ±2% - enables single-point calibration in cost-sensitive portable data loggers without trimming. |
| Temperature Drift | Max 100 ppm/°C - ensures ≤208 ppm total drift over –40°C to 125°C, critical for unheated field-deployed sensors. |
| Dropout Voltage | 1 mV at ILOAD = 0 mA - allows operation from 2.049 V supply in battery-powered systems where voltage sags below 2.1 V. |
| Quiescent Current | Max 50 µA - supports >1-year battery life in coin-cell–powered IoT nodes drawing <1 µA average system current. |
| Output Noise | 23 µVPP (0.1–10 Hz), 65 µVRMS (10 Hz–10 kHz) - meets ENOB ≥15.5 bits for 16-bit delta-sigma ADCs in medical front-ends. |
| Load Current | 25 mA - drives multiple op-amp buffers or SAR ADC references simultaneously without external pass devices. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, gull-wing leads. RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply terminal | Accepts input from 2.049 V to 5.5 V; requires ≥0.47 µF ceramic bypass capacitor for PSRR optimization. |
| 2 (OUT) | Precision reference output | Delivers stable 2.048 V; may drive capacitive loads directly; force-sense layout recommended for <10 µV/mA load regulation. |
| 3 (GND) | Analog ground reference | Must connect to low-impedance analog ground plane; separate from digital ground to avoid noise coupling into reference path. |
Key Features
| Feature | Design Value |
|---|---|
| No-output-capacitor stability | Operates reliably with 0 µF output capacitance-eliminates BOM cost and board space for decoupling in space-constrained wearables. |
| Ultra-low dropout | 1 mV headroom enables use in Li-ion battery systems discharging from 2.1 V to 2.05 V without reference collapse. |
| Low quiescent current | 42 µA typical at 25°C, 59 µA max over temperature-supports always-on sensor nodes with multi-year battery life. |
| High output current | 25 mA continuous sourcing capability-replaces discrete buffer stages when driving multiple ADC references or op-amp bias networks. |
| Wide temperature range | Specified from –40°C to 125°C junction temperature-qualified for automotive under-hood and industrial motor-control applications. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter measuring 0–20 V DC with 16-bit resolution. IC Role / Device Role / Timing Role: Provides 2.048 V reference for SAR ADC and internal DAC calibration. Use Value: Enables ±0.01% full-scale accuracy without factory trim, leveraging 2% initial tolerance and 100 ppm/°C drift. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Supplies stable reference to 24-bit delta-sigma ADC and programmable gain amplifier. Use Value: Maintains <0.001% gain error over –25°C to 70°C ambient via low-drift 2.048 V output. |
| Medical Monitoring Devices | Test & Measurement Equipment |
Use Scenario: Portable ECG front-end amplifying microvolt-level cardiac signals. IC Role / Device Role / Timing Role: Sets common-mode voltage and ADC reference for 24-bit sigma-delta converter. Use Value: 23 µVPP low-frequency noise prevents baseline wander masking P-wave morphology. |
Use Scenario: Benchtop DMM performing auto-ranging with dual-slope integration. IC Role / Device Role / Timing Role: Precision reference for integrator capacitor charging and comparator threshold. Use Value: 100 ppm/°C drift limits range-switching error to <1 LSB across operating temperature span. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3420ARMZ | 2.048 V, ±0.1% initial accuracy, 30 ppm/°C drift, 12 µA IQ, SOT-23-5 | Higher accuracy and lower drift but requires 5-pin layout; not pin-compatible | Select when absolute accuracy <0.1% and long-term stability dominate over board area and cost. |
| MAX6029BASA20+ | 2.048 V, ±0.2% initial accuracy, 75 ppm/°C drift, 35 µA IQ, SOT-23-3 | Same 3-pin SOT-23 footprint and 2.048 V output; 15 ppm/°C better drift than REF2920AIDBZT | Choose for improved thermal stability in unregulated ambient environments without changing PCB layout. |
Compared with ADR3420ARMZ and MAX6029BASA20+, REF2920AIDBZT offers the lowest quiescent current (50 µA max) and smallest solution size (3-pin SOT-23), making it optimal for ultra-low-power portable designs where 2% initial tolerance is acceptable.
Availability
REF2920AIDBZT is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and medical monitoring devices requiring stable component supply with guaranteed long-term availability.
Supply support for REF2920AIDBZT 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 REF29xx family was engineered specifically for battery-powered and space-constrained applications demanding ultra-low IQ, minimal dropout, and robust thermal performance across extended temperature ranges.
FAQ
What is the minimum input voltage required for stable operation of REF2920AIDBZT?
The REF2920AIDBZT requires a minimum input voltage of VOUT + 0.001 V (i.e., 2.049 V) under no-load conditions. With 25 mA load, the dropout rises to 50 mV, so VIN must be ≥2.098 V. This ultra-low headroom enables direct use with aging lithium batteries whose voltage drops to 2.1 V.
Does REF2920AIDBZT require an output capacitor for stability?
No, REF2920AIDBZT is internally compensated and remains stable with zero output capacitance. It is also stable with any value and ESR of capacitive load-including large bulk capacitors-making it ideal for systems where output filtering is needed without risking oscillation.
What is the typical output voltage noise of REF2920AIDBZT in the 0.1 Hz to 10 Hz band?
The typical output voltage noise of REF2920AIDBZT is 23 µVPP in the 0.1 Hz to 10 Hz band. This low flicker noise supports high-resolution measurements in ECG, strain-gauge, and thermocouple applications where sub-microvolt baseline stability is essential.
How does the load regulation specification of REF2920AIDBZT impact precision ADC designs?
REF2920AIDBZT exhibits 3–100 µV/mA load regulation, measured using force-and-sense methodology. In precision ADC designs, this means a 10 mA load change introduces ≤1 mV error-acceptable for 12-bit systems but warrants Kelvin sensing for 16-bit+ accuracy to eliminate PCB trace resistance effects.
Is REF2920AIDBZT qualified for automotive applications?
REF2920AIDBZT is specified from –40°C to 125°C junction temperature and meets JEDEC JESD22-A108 reliability standards. While not AEC-Q200 certified, its thermal and electrical specs align with under-dash automotive sensor modules where full qualification is not mandated by end-customer requirements.
REF2920AIDBZT 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
REF2920AIDBZT FAQ
1.How can I place an order for REF2920AIDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for REF2920AIDBZT 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 REF2920AIDBZT reliable?
The price and inventory of REF2920AIDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF2920AIDBZT is usually 5 days.
3.What payment methods are accepted for REF2920AIDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF2920AIDBZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF2920AIDBZT?
REF2920AIDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF2920AIDBZT 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 REF2920AIDBZT?
For technical support, including REF2920AIDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF2920AIDBZT requirements.
6.How does Aetrix verify that REF2920AIDBZT is sourced from the original manufacturer or authorized distributors?
All REF2920AIDBZT 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 REF2920AIDBZT meets industry standards.
7.What is the process for return or replacement of REF2920AIDBZT?
All REF2920AIDBZT units undergo pre-shipment inspection (PSI). If there is an issue with REF2920AIDBZT, 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 REF2920AIDBZT part is unused and in its original packaging.
Return procedure for REF2920AIDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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