REF3030AIDBZR - 3V 0.2% 50ppm/C Reference | TI
MPN: REF3030AIDBZR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.29 | $0.29 |
| 10 | $0.24 | $2.40 |
| 100 | $0.19 | $19.00 |
| 500 | $0.15 | $75.00 |
| 1,000 | $0.1331 | $133.10 |
REF3030AIDBZR Overview
A voltage reference is a foundational building block in analog and mixed-signal systems: it establishes the stable benchmark voltage from which ADCs and DACs convert signals, comparators make decisions, and precision amplifiers operate. The REF3030AIDBZR belongs to the REF30xx family of CMOS series (bandgap) voltage references, a subset of the broader voltage reference category that includes shunt and series topologies, ultimately within power management ICs.
Key features include low dropout operation with input voltages as low as 3.05V, enabling use directly after low-voltage LDOs or one-cell-lithium rails; 50 ppm/°C max drift ensuring stable output from -40°C to +125°C; and low 42 µA quiescent current that extends battery life in portable instruments. The CMOS architecture minimizes supply sensitivity and keeps line and load regulation tight.
Technically, the device uses a CMOS bandgap core whose stable voltage is buffered by an output amplifier, achieving approximately 50 µVrms of output noise from 10 Hz to 10 kHz. Internal compensation ensures stability with capacitive loads up to 10 µF, and the series topology needs only 1 µF input decoupling in most designs.
Typical applications include precision data-acquisition references for ADCs in battery-powered handheld meters, sensor-node systems, industrial process control, and comparator/op-amp bias rails in portable instrumentation.
Design tip: place a 0.1 µF bypass capacitor close to the output pin and a 1 µF capacitor on the input; maintain VIN of at least 3.05V to keep the part in regulation. Pricing starts around $0.13 at volume as of 2026-08-30.
Drop-in alternatives for REF3030AIDBZR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with REF3030AIDBZR (same form factor and footprint) — differing in Package, Packaging, Quiescent Current, Temperature Drift, Topology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
REF3030AIDBZT
✅ Drop-In✓ In Stock
$0.5 / Unit
View Datasheet →REF3030AIDBZR-Q1
✅ Drop-In✓ In Stock
$0.36 / Unit
View Datasheet →REF3033AIDBZT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
REF3025AIDBZR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MAX6037BAUT30
✅ Drop-In📋 Reference alternative (not in catalog)
REF3030AIDBZR Specifications
| Output Voltage | 3.0 V (fixed) |
| Initial Accuracy | ±0.2% |
| Temperature Drift | 50 ppm/C max |
| Topology | Series (bandgap), CMOS |
| Maximum Output Current | 25 mA (source) |
| Quiescent Current | 42 uA typical |
| Output Noise | Approximately 50 uVrms (10 Hz to 10 kHz) |
| Operating Temperature | -40C to +125C (Grade A) |
| Package | SOT-23-3 (DBZ) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (R suffix) |
| RoHS Status | Compliant |
REF3030AIDBZR Pin Configuration
| Pin 1 | VIN — Input supply (min 3.05V for regulation) |
| Pin 2 | GND — Ground |
| Pin 3 | VOUT — 3.0V precision reference output |
Typical Applications
REF3030AIDBZR is suitable for 6 applications: Battery-Powered Handheld Meters, Precision Data Acquisition, Industrial Process Control, Sensor Node and IoT Systems, Comparator and Op-Amp Bias Rails, Automotive Analog References.
Battery-Powered Handheld Meters
The REF3030AIDBZR's 42 uA typical quiescent current and 3.05V low dropout make it a strong fit for multimeters, environmental meters, and portable instruments powered by a single lithium cell. It provides a stable 3V reference for the ADC, preserving ±0.2% initial accuracy and 50 ppm/C drift so measurement calibration holds over battery discharge and temperature swings. Placed between the battery rail and the ADC VREF pin with a 1 uF input and 0.1 uF output capacitor, it adds negligible supply burden while delivering approximately 50 uVrms-class noise.
Recommended
Precision Data Acquisition
In data-acquisition front ends, the reference sets the full-scale accuracy of every conversion, so the REF3030AIDBZR's ±0.2% initial accuracy and 50 ppm/C max drift directly limit system error to about 6 mV initial plus 150 ppm across the industrial range. Its series topology sources up to 25 mA, sufficient to drive SAR ADC reference inputs directly or through a buffer for dynamic reference currents. Stable with up to 10 uF load capacitance, it tolerates the decoupling SAR converters need without external compensation.
Recommended
Industrial Process Control
4-20 mA transmitters and industrial sensor conditioners need a reference that holds accuracy from -40C to +125C. The REF3030AIDBZR's Grade A 50 ppm/C max drift and CMOS bandgap architecture keep span calibration stable across factory-floor temperature extremes, while 42 uA supply current keeps isolated or loop-powered designs within power budgets. Its SOT-23-3 footprint also simplifies dense analog I/O card layouts, and 25 mA source capacity covers reference buffering for multiple channels.
Recommended
Sensor Node and IoT Systems
Battery-powered IoT sensor nodes use the REF3030AIDBZR as an absolute reference for ratiometric-to-absolute conversion of bridge and resistive sensor readings, ensuring measurements remain valid as the supply rail sags. At 42 uA quiescent current, a 1000 mAh cell could power the reference alone for over two years, and its 3.05V dropout allows operation down to a nearly depleted single-cell lithium supply. The tiny SOT-23-3 package fits space-constrained node PCBs.
Recommended
Comparator and Op-Amp Bias Rails
Portable instrumentation uses the REF3030AIDBZR to generate clean mid-scale or threshold voltages for comparators and op-amp biasing. Its 50 uVrms-class output noise prevents threshold jitter, and ±0.2% accuracy means thresholds stay within 6 mV of target without trimming. With 25 mA source capability it can feed resistive dividers and multiple op-amp non-inverting inputs simultaneously, and stability with up to 10 uF capacitive loads lets designers add generous bypassing for noise-sensitive stages.
Recommended
Automotive Analog References
For automotive ECUs and BMS supervision circuits requiring AEC-Q100 qualification, the pin-identical REF3030AIDBZR-Q1 provides the same 3V, ±0.2%, 50 ppm/C performance in the same SOT-23-3 footprint, enabling a direct BOM upgrade without PCB change. It supplies the reference for battery-voltage supervisory ADCs and current-sense signal chains, and pairs naturally with TI automotive amplifiers and isolators already common in 12V-node designs.
Recommended
Recommended Products Summary
Engineering reference data for REF3030AIDBZR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | REF3030AIDBZT | REF3030AIDBZR-Q1 | REF3033AIDBZT | MAX6037BAUT30 |
|---|---|---|---|---|---|
| Package | SOT-23-3 (DBZ) | SOT-23-3 - same | SOT-23-3 - same | SOT-23-3 - same | SOT-23 - same outline |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices (Maxim) |
| Output Voltage | 3.0 V | 3.0 V | 3.0 V | 3.3 V | 3.0 V |
Key Differentiators
- Ultra-low quiescent current (vs REF5030AIDGKR-Q1)
- Automotive upgrade path with zero PCB change (vs REF3030AIDBZR-Q1)
- Cost and size advantage over precision family (vs REF5030AIDGKR-Q1)
Design Notes
Place a 1 uF ceramic capacitor at VIN and a 0.1 uF ceramic capacitor directly at VOUT, both within a few millimeters of the pins with short traces to a solid ground plane. The REF3030 is stable with capacitive loads up to 10 uF per the TI REF30xx datasheet, so additional output bypassing is allowed for noise-sensitive loads, but avoid purely resistive heavy loads near the 25 mA limit without verifying regulation.
Maintain at least 3.05V at VIN under all conditions including battery sag and supply ripple to keep the part in dropout-free regulation. Dropout rises with load current, so for designs drawing tens of milliamps, budget extra headroom above the minimum input. Power dissipation is minimal (42 uA quiescent plus load), so no thermal design is typically needed.
A frequent mistake is treating the REF3030 like a shunt reference - it is a series device requiring an input supply and decoupling, not a resistor to a rail. Also avoid connecting capacitive loads exceeding 10 uF with very low ESR without checking datasheet stability guidance, and remember the accuracy budget: ±0.2% initial accuracy equals ±6 mV, so do not expect REF50-class ±0.05% performance.
Compliance Information
RoHS compliant and lead-free per TI product data and distributor listings. Use REF3030AIDBZR-Q1 for AEC-Q100 automotive applications.
