REF3030AIDBZT - 3V 50ppm/°C Low-Dropout Voltage Reference | Texas Instruments
MPN: REF3030AIDBZT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.96 | $0.96 |
| 10 | $0.86 | $8.60 |
| 100 | $0.72 | $72.00 |
| 500 | $0.61 | $305.00 |
| 1,000 | $0.5 | $500.00 |
REF3030AIDBZT Overview
A voltage reference IC is a precision analog building block whose function is to generate a stable, temperature-invariant DC voltage used as the absolute scale against which ADC conversions, DAC outputs, sensor signals, and power-supply thresholds are measured. Voltage references sit within the broader power-management and signal-chain hierarchy: voltage reference → series/shunt reference → power management IC → semiconductor. In precision data-acquisition and instrumentation systems, the reference's initial accuracy and temperature drift directly bound the achievable system accuracy, which is why low-drift parts such as the REF3030AIDBZT are favored over on-chip MCU references.
Key differentiating features of the REF3030AIDBZT include 50 ppm/°C maximum drift, 25 mA output current capability from a SOT-23-3 footprint, 50 µA maximum quiescent current, and operation with no required output load capacitor (although it is stable with any capacitive load). The reference offers a low dropout suitable for direct regulation from low-voltage rails, and the SOT-23-3 package suits space-constrained PCB layouts where larger SOT-23-5 or SOIC-8 references will not fit.
Architecturally, the REF3030AIDBZT uses a CMOS bandgap core trimmed at wafer level to achieve ±0.2% initial accuracy and tight temperature drift. The 25 mA output is enabled by an integrated series pass element that also defines the dropout characteristic. Compared with shunt-mode references (e.g., LM4040), the series topology avoids the additional series resistor and the associated quiescent-current overhead, which is critical in low-power designs.
Typical applications include ADC/DAC reference rails in portable data loggers, battery-powered instrumentation, industrial sensor signal conditioning, threshold detectors, and precision comparators. The low 50 µA quiescent current makes the part especially attractive for IoT edge nodes and remote sensor transmitters that spend long periods in sleep.
When designing with the REF3030AIDBZT, observe the absolute maximum input voltage rating, bypass the supply pin with a 0.1 µF ceramic capacitor placed close to the IC, and verify that the load current does not exceed 25 mA. The part is stable with any capacitive load including zero, simplifying the output filter network.
Drop-in alternatives for REF3030AIDBZT — 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 REF3030AIDBZT (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:
REF3033AIDBZT
✅ Drop-In📋 Reference alternative (not in catalog)
REF3025AIDBZT
✅ Drop-In📋 Reference alternative (not in catalog)
REF3040AIDBZT
✅ Drop-In📋 Reference alternative (not in catalog)
REF3030AIDBZR
✅ Drop-In✓ In Stock
$0.1331 / Unit
View Datasheet →REF3020AIDBZT
✅ Drop-In📋 Reference alternative (not in catalog)
ADR03ARZ
✅ Drop-In📋 Reference alternative (not in catalog)
REF3030AIDBZT Specifications
| Reference Type | Series Voltage Reference |
| Output Voltage | 3.0 V (fixed) |
| Initial Accuracy | ±0.2% |
| Temperature Drift | 50 ppm/°C (max) |
| Output Current | 25 mA |
| Quiescent Current | 50 µA (max) |
| Topology | CMOS bandgap, series |
| Output Capacitor Requirement | None required; stable with any capacitive load |
| Package | SOT-23-3 |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 °C to +125 °C |
| MSL Level | 1 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Packaging | Tape & Reel (7-inch reel) |
REF3030AIDBZT Pin Configuration
| Pin 1 | VIN — Input supply voltage |
| Pin 2 | GND — Ground reference |
| Pin 3 | VOUT — Reference output (3.0 V) |
Typical Applications
REF3030AIDBZT is suitable for 6 applications: Portable Battery-Powered Instrumentation, IoT Edge Sensor Nodes, Industrial Sensor Signal Conditioning, Precision Threshold Detectors and Comparators, Medical Patient Monitoring Devices, Automotive Sensor Modules (non-safety).
Portable Battery-Powered Instrumentation
The REF3030AIDBZT serves as the stable 3.0 V ADC reference rail in handheld multimeters, portable data loggers, and field-test instruments. Its 50 µA maximum quiescent current and CMOS bandgap topology keep battery drain minimal during long measurement campaigns, while the ±0.2% initial accuracy and 50 ppm/°C drift provide sufficient stability for 12-bit and 14-bit ADC conversions. Placed between the 3.3 V Li-ion rail and the AVDD pin of an ADS7042 or similar SAR ADC, with a 0.1 µF ceramic bypass at the VIN pin, the REF3030AIDBZT eliminates the need for an output capacitor and reduces BOM cost by one component. This makes it a strong fit for handheld instruments where board area and battery life are at a premium.
Recommended
IoT Edge Sensor Nodes
In wireless IoT sensor nodes (e.g., LoRa, BLE, Zigbee environmental sensors), the REF3030AIDBZT provides the precision reference for sensor signal-conditioning ADCs and threshold comparators. Its 50 µA Iq is small enough to leave a typical coin-cell or 2x AA budget largely intact across multi-year deployments, and the SOT-23-3 package fits inside miniature sensor housings. Driving a 12-bit ADC front-end with a stable 3.0 V reference removes gain and offset drift in temperature and humidity measurements that would otherwise require periodic in-field calibration. With no output capacitor required, the part simplifies the analog section of low-power IoT designs and reduces leak failure modes.
Recommended
Industrial Sensor Signal Conditioning
The REF3030AIDBZT is well matched to industrial 4-20 mA transmitters, RTD conditioning circuits, and bridge-amplifier signal chains where a stable reference rail sets the absolute scale of the measurement. Its ±0.2% initial accuracy and 50 ppm/°C drift are sufficient for 12-bit PLC analog-input modules, while the -40 °C to +125 °C operating range covers industrial environments. Placed at the reference input of an INA125 instrumentation amplifier or as the bias reference for an RTD excitation current source, the REF3030AIDBZT provides the temperature stability required to keep sensor readings accurate across factory-floor thermal swings.
Recommended
Precision Threshold Detectors and Comparators
Threshold detectors, window comparators, and over/undervoltage monitoring circuits benefit from the REF3030AIDBZT's stable 3.0 V reference to set precise trip points independent of supply variation. Used to bias the reference input of a TLV3201 or TLV3701 comparator, the part enables tight threshold accuracy (better than ±1% including temperature drift) for battery-protection, power-rail monitoring, and system-reset functions. The 25 mA output capability lets the reference drive multiple comparator reference inputs directly without a buffer op-amp, simplifying and shrinking the analog section of supervisory circuits.
Recommended
Medical Patient Monitoring Devices
In portable patient monitoring equipment (e.g., pulse oximeters, glucose meters, ECG patches), the REF3030AIDBZT provides the low-noise, low-drift reference rail for the analog front-end that processes biosignals. Its 50 µA quiescent current supports battery-powered operation over multi-day wear periods, and the SOT-23-3 package fits compact wearable form factors. Driving a 12-bit or 14-bit ADC with the REF3030AIDBZT's 3.0 V reference establishes a stable measurement baseline for SpO2, heart rate, and glucose-level algorithms. Stability without output capacitance reduces the bill of materials and improves long-term reliability in medical-grade designs.
Recommended
Automotive Sensor Modules (non-safety)
The REF3030AIDBZT supports non-safety automotive sensor modules such as body-control climate sensors, ambient-light sensors, and infotainment analog inputs where precision 3.0 V reference is required but AEC-Q100 qualification is not mandatory. Its -40 °C to +125 °C operating range covers the automotive temperature spec, and its 25 mA output capability can drive multiple ADC channels inside an ECU. For safety-critical or AEC-Q100-mandated applications, the TI REF30E automotive-grade equivalents should be selected; the standard REF3030AIDBZT fits cost-sensitive non-safety analog rails.
Recommended
Recommended Products Summary
Engineering reference data for REF3030AIDBZT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | REF3033AIDBZT | REF3025AIDBZT | REF3040AIDBZT | REF3030AIDBZR | REF3020AIDBZT | ADR03ARZ |
|---|---|---|---|---|---|---|---|
| Package | SOT-23-3 | SOT-23-3 - same | SOT-23-3 - same | SOT-23-3 - same | SOT-23-3 - same | SOT-23-3 - same | SOIC-8 - DIFFERENT footprint, NOT pin-compatible |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Output Voltage | 3.0 V | 3.3 V | 2.5 V | 4.096 V | 3.0 V (identical) | 2.048 V | 3.0 V |
| Initial Accuracy | ±0.2% | ±0.2% | ±0.2% | ±0.2% | ±0.2% | ±0.2% | ±0.2% |
| Temperature Drift (max) | 50 ppm/°C | 50 ppm/°C | 50 ppm/°C | 50 ppm/°C | 50 ppm/°C | 50 ppm/°C | 10 ppm/°C (better) |
| Output Current | 25 mA | 25 mA | 25 mA | 25 mA | 25 mA | 25 mA | 10 mA (lower) |
| Quiescent Current (max) | 50 µA | 50 µA | 50 µA | 50 µA | 50 µA | 50 µA | 1 mA (higher) |
| Output Capacitor Required | No (stable with any cap) | No | No | No | No | No | Required for stability |
Key Differentiators
- No output capacitor required for stability (vs ADR03ARZ)
- Lower quiescent current for battery-powered designs (vs ADR03ARZ)
- Compact SOT-23-3 footprint (vs ADR03ARZ)
Design Notes
Bypass the VIN pin (pin 1) with a 0.1 µF X7R ceramic capacitor placed within 2-3 mm of the IC. According to the TI REF30 datasheet, the REF3030AIDBZT has no required output capacitor; however, adding a small 0.01-0.1 µF output capacitor improves load-transient response when driving dynamic loads such as ADC reference inputs with switched-capacitor input stages. Verify VIN headroom: input voltage must remain above VOUT + dropout for the part to regulate; consult the datasheet for exact dropout voltage.
The REF3030AIDBZT dissipates only a few milliwatts under normal load and does not require thermal management. Estimated: at VIN = 5 V, VOUT = 3.0 V, IOUT = 25 mA, the device dissipates approximately (5-3.0) × 0.025 = 50 mW, well within the SOT-23-3 thermal limit of roughly 250 mW at 25 °C ambient (θJA ≈ 200 °C/W on a 4-layer JEDEC test board). For -40 °C to +125 °C operation, the part is rated for continuous output current over the full industrial range.
Use a ground plane beneath the REF3030AIDBZT and keep digital traces (especially switching-converter and high-speed data lines) routed away from the VOUT pin to avoid corrupting the reference. The SOT-23-3 package has the die-attach paddle on the bottom electrically floating; no connection is needed, but the paddle can be soldered to the input pin copper for additional thermal dissipation if the part operates near full output current at high VIN.
Do not load the REF3030AIDBZT with more than 25 mA; the part's internal pass element is not designed for sustained higher currents and accuracy will degrade. Avoid placing high-ESR output capacitors if the design requires low noise; use X7R or C0G/NP0 ceramics. When migrating between REF30 family variants (e.g., REF3030AIDBZT vs REF3025AIDBZT), verify the output voltage label on the reel, not just the base part number, to avoid BOM errors in production.
Compliance Information
RoHS compliant and lead-free per TI product page. Standard commercial/industrial grade - not AEC-Q100 qualified; choose Q1 variants for automotive. Halogen-free status not explicitly stated in retrieved data; refer to TI material declaration documents.
