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Texas Instruments REF1930AIDDCR
- Part No.:
- REF1930AIDDCR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
REF1930AIDDCR.pdf
- Description:
- IC VREF SERIES 0.1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,435
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Product details
Overview
REF1930AIDDCR from Texas Instruments is a dual-output, low-drift, low-power voltage reference IC delivering precise 3.0 V (VREF) and 1.5 V (VBIAS = VREF/2) outputs for single-supply signal conditioning. It features ±0.1% initial accuracy, 25 ppm/°C max temperature drift over –40°C to 125°C, 6 ppm/°C max VREF–VBIAS tracking over –40°C to 85°C, and ±20 mA output drive capability - enabling high-precision biasing in ADC front-ends for industrial current sensing and motor control systems.
For engineers reviewing the REF1930AIDDCR datasheet, REF1930AIDDCR pinout, REF1930AIDDCR application, or REF1930AIDDCR equivalent, this page delivers verified specifications, SOT23-5 package details, real-world use cases in bipolar-signal conditioning, and validated alternative options aligned with TI's REF19xx family documentation.
Technical Context
The REF1930AIDDCR implements a band-gap core with e-Trim™ post-mold calibration to achieve simultaneous high initial accuracy and low temperature drift on both outputs. Its dual-buffer architecture ensures VREF and VBIAS derive from the same reference node, enabling tight tracking without external components.
It operates in active mode when EN ≥ VIN – 0.7 V and enters shutdown (3.3–5 µA quiescent current) when EN < 0.7 V. The 10 mV dropout allows operation with input as low as VREF + 0.02 V, supporting battery-powered and low-voltage industrial designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF Output | 3.0 V ±0.1% - stable primary reference for ADC full-scale calibration |
| VBIAS Output | 1.5 V ±0.1% - exact VREF/2 for mid-rail bias of bipolar analog inputs |
| Temp Drift (VREF/VBIAS) | ±25 ppm/°C max (–40°C to 125°C) - limits gain error in precision measurement over wide ambient range |
| VREF–VBIAS Tracking | ±6 ppm/°C max (–40°C to 85°C) - maintains ADC common-mode rejection in single-supply data acquisition |
| Output Drive | ±20 mA per output - supports direct driving of ADC reference inputs and op-amp bias networks |
| Quiescent Current | 360 µA typical (active), 5 µA max (shutdown) - enables always-on monitoring with ultra-low power budget |
| Dropout Voltage | 10 mV at 20 mA load - permits operation from 3.02 V supply, critical for Li-ion or energy-harvesting systems |
Pinout & Package
SOT23-5 package (2.90 mm × 1.60 mm), surface-mount, thermally enhanced plastic body with exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VBIAS | Output | Provides 1.5 V reference for ADC common-mode or op-amp bias; sinks/sources ±20 mA |
| 2 - GND | Ground | Analog ground return for both reference outputs; must be low-impedance connection to system AGND |
| 3 - EN | Digital Input | Active-high enable: device enabled when ≥ VIN – 0.7 V; pulls to GND for shutdown mode |
| 4 - VIN | Power Input | Input supply: 3.02 V to 5.5 V; minimum headroom defined by 10 mV dropout specification |
| 5 - VREF | Output | Primary 3.0 V reference for ADC VREF, DAC reference, or precision comparator thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Dual buffered outputs | VREF and VBIAS share same band-gap source, eliminating need for external resistor divider and reducing layout sensitivity |
| e-Trim™ calibration | Post-mold trimming achieves ±0.1% initial accuracy and 25 ppm/°C drift without laser trimming or external calibration |
| Low-noise performance | 12 ppmPP (0.1–10 Hz) enables high-resolution DC measurements without added filtering overhead |
| High PSRR | ≥60 dB up to 10 kHz - rejects supply ripple from noisy DC-DC converters in industrial PLCs and motor drives |
| Stable with 0–10 µF capacitive load | Eliminates need for external compensation; supports ceramic decoupling directly at ADC reference pins |
Applications
| Current Sensing Front-End | Single-Supply ADC Biasing |
|---|---|
Use Scenario: Bidirectional current measurement in motor phase legs using shunt resistor and INA213 amplifier. IC Role / Device Role / Timing Role: REF1930AIDDCR supplies 3.0 V VREF to INA213 and 1.5 V VBIAS to center its output swing for ±2.5 A range. Use Value: Tight VREF–VBIAS tracking (6 ppm/°C) preserves common-mode rejection across temperature, reducing gain error in closed-loop motor control. | Use Scenario: Driving SAR ADC reference input in portable medical sensor with single 3.3 V rail. IC Role / Device Role / Timing Role: REF1930AIDDCR provides accurate 3.0 V VREF and 1.5 V VBIAS to bias differential input signals into ADC's valid input range. Use Value: ±0.1% initial accuracy and 25 ppm/°C drift ensure <0.05% total unadjusted error over medical operating temperature range (0°C–50°C). |
| Industrial Process Controller | Data Acquisition System |
Use Scenario: Analog input module for 4–20 mA loop receiver with HART modulation support. IC Role / Device Role / Timing Role: REF1930AIDDCR generates stable 3.0 V reference for 16-bit ΣΔ ADC and 1.5 V bias for op-amp signal conditioning stage. Use Value: 10 mV dropout enables operation from 3.02 V LDO output, minimizing thermal dissipation in confined DIN-rail enclosures. | Use Scenario: Multi-channel precision DAQ for vibration monitoring in predictive maintenance equipment. IC Role / Device Role / Timing Role: REF1930AIDDCR supplies matched VREF/VBIAS to eight synchronized ADCs via star topology routing. Use Value: Low 360 µA quiescent current and ±20 mA drive allow centralized reference distribution without local buffers, reducing BOM count and board area. |
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 |
|---|---|---|---|
| REF1930AIDBVR | SOT23-5 package, identical electrical specs; differs only in tape-and-reel packaging (DBVR vs DDCR) | No functional difference; DBVR is reel format for automated assembly, DDCR is cut-tape for prototyping or low-volume | Select REF1930AIDDCR for manual soldering or small-batch evaluation; choose DBVR for high-volume SMT production. |
| ADR4530BRZ | Single-output 3.0 V reference (SOIC-8); no VBIAS output; 3 ppm/°C drift, 0.02% initial accuracy - higher precision but requires external divider for VREF/2 | Requires external 0.1% resistor network and op-amp buffer to replicate VBIAS function; adds error sources and board space | Choose ADR4530BRZ only when ultimate drift performance is required and VBIAS generation can be implemented externally with validated matching. |
Compared with REF1930AIDDCR, REF1930AIDBVR offers identical performance in reel format for production, while ADR4530BRZ trades integrated VBIAS for superior drift spec but increases design complexity and uncertainty in VREF/2 generation.
Availability
REF1930AIDDCR is available at Aetrix Electronics and suitable for industrial process controllers, motor control feedback loops, and portable medical instrumentation requiring stable component supply with guaranteed long-term continuity.
Supply support for REF1930AIDDCR 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 and industrial-grade reference solutions.
The REF19xx product line was designed specifically for single-supply systems needing matched dual references - targeting high-accuracy current sensing, data acquisition, and motor control applications where VREF/2 biasing eliminates external components and improves thermal tracking.
FAQ
What is the maximum allowable input voltage for REF1930AIDDCR?
The absolute maximum input voltage (VIN) for REF1930AIDDCR is 6 V, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent damage. For reliable long-term performance, TI recommends staying within the recommended operating condition of VREF + 0.02 V to 5.5 V - meaning 3.02 V to 5.5 V for REF1930AIDDCR. Exceeding 5.5 V may degrade reliability even if below 6 V.
Does REF1930AIDDCR require an external capacitor on VREF or VBIAS outputs?
No, REF1930AIDDCR is stable with 0 µF to 10 µF output capacitance and does not require external compensation. TI's datasheet confirms stability across this full range using ceramic capacitors. Adding >10 µF may cause instability, and <0 µF (no cap) is acceptable for low-noise, low-current applications - though 100 nF ceramic is recommended near each output for high-frequency PSRR improvement.
How does the EN pin function on REF1930AIDDCR?
The EN pin on REF1930AIDDCR is an active-high digital input. When pulled to ≥ VIN – 0.7 V, the device operates in active mode (360 µA typical ICC). When held < 0.7 V, it enters shutdown mode with ICC ≤ 5 µA and both VREF and VBIAS outputs go high-impedance. No pull-up is required - the pin is CMOS-compatible and draws negligible current in either state. REF1930AIDDCR remains fully specified across –40°C to 125°C in both modes.
Can REF1930AIDDCR drive a 10 kΩ load on both outputs simultaneously?
Yes. REF1930AIDDCR can drive 10 kΩ loads on both VREF and VBIAS simultaneously with minimal error: at 25°C and VIN = 5 V, load regulation is 8 ppm/mA max, so a 0.3 mA load (3 V / 10 kΩ) induces <2.5 ppm error - well within the ±0.1% initial accuracy. Total output current remains within ±20 mA per output limit. Thermal effects are negligible at this load level, preserving accuracy in precision applications.
What is the long-term stability specification for REF1930AIDDCR?
REF1930AIDDCR has a long-term stability of 60 ppm over 1000 hours, measured under standard conditions (TA = 25°C, VIN = 5 V, no load). This value reflects typical drift due to silicon aging and is specified in the Electrical Characteristics table. It does not include solder heat shift or thermal hysteresis - those are separate parameters (≤60 ppm and ≤35 ppm respectively). For mission-critical 10+ year deployments, TI recommends derating based on accelerated life testing data in the datasheet's reliability report.
REF1930AIDDCR 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- 12ppmp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.02V ~ 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
REF1930AIDDCR FAQ
1.How can I place an order for REF1930AIDDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF1930AIDDCR 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 REF1930AIDDCR reliable?
The price and inventory of REF1930AIDDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF1930AIDDCR is usually 5 days.
3.What payment methods are accepted for REF1930AIDDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF1930AIDDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF1930AIDDCR?
REF1930AIDDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF1930AIDDCR 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 REF1930AIDDCR?
For technical support, including REF1930AIDDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF1930AIDDCR requirements.
6.How does Aetrix verify that REF1930AIDDCR is sourced from the original manufacturer or authorized distributors?
All REF1930AIDDCR 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 REF1930AIDDCR meets industry standards.
7.What is the process for return or replacement of REF1930AIDDCR?
All REF1930AIDDCR units undergo pre-shipment inspection (PSI). If there is an issue with REF1930AIDDCR, 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 REF1930AIDDCR part is unused and in its original packaging.
Return procedure for REF1930AIDDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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