REF3030AIDBZR-Q1 - 3V 50ppm Voltage Reference | Texas Instruments
MPN: REF3030AIDBZR-Q1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.68 | $0.68 |
| 10 | $0.61 | $6.10 |
| 100 | $0.49 | $49.00 |
| 500 | $0.42 | $210.00 |
| 1,000 | $0.36 | $360.00 |
Drop-in alternatives for REF3030AIDBZR-Q1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
REF3030AIDBZR
✅ Drop-In✓ In Stock
$0.55 / Unit
View Datasheet →REF1930
✅ Drop-In✓ In Stock
$1 / Unit
View Datasheet →REF3430AQDBZRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
REF3033AIDBZR
⚡ Same Package📋 Reference alternative (not in catalog)
MAX6037BAUT30
⚡ Same Package📋 Reference alternative (not in catalog)
REF3030AIDBZR-Q1 Maximum Ratings & Electrical Characteristics
| Output Voltage | 3 V (fixed) |
| Initial Accuracy | ±0.2% |
| Temperature Drift | 50 ppm/°C max |
| Output Current | 25 mA (source/sink) |
| Quiescent Current | 42 uA typical (50 uA class) |
| Reference Type | Series (bandgap CMOS) |
| Topology | Series voltage reference |
| Operating Temperature | -40°C to +125°C |
| Grade | Automotive (Q1) |
| Package | SOT-23-3 (DBZ) |
| Package Dimensions | 2.92 mm x 1.3 mm x 1 mm |
| Pin Count | 3 |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (R suffix) |
| Input Voltage Headroom | [DATA_NEEDED: maximum input voltage] |
| RoHS Status | Compliant |
REF3030AIDBZR-Q1 Pin Configuration
| Pin 1 | VIN — Input supply voltage |
| Pin 2 | GND — Ground |
| Pin 3 | VOUT — 3V precision reference output |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
REF3030AIDBZR-Q1 is suitable for 6 applications: Portable Battery-Powered Instruments, ADC Reference for Data Acquisition, Automotive Battery Monitoring, Sensor Excitation and Threshold Detection, Current-Sense Scaling Reference, MCU and System Power Rail Supervision.
Portable Battery-Powered Instruments
With only 42 uA typical quiescent current, the REF3030AIDBZR-Q1 anchors the ADC reference input of handheld meters, dataloggers, and portable test gear without measurably shortening battery life. A 3V, ±0.2% reference keeps 12-bit conversion error from the reference below roughly 0.3% including drift. Placed between the battery rail and the ADC REF pin with a 0.1 uF ceramic output capacitor, the series topology regulates actively and avoids the constant wasted bias current of a shunt reference - a key advantage in always-on battery designs.
Recommended
ADC Reference for Data Acquisition
The REF3030AIDBZR-Q1 supplies a stable 3V full-scale reference for successive-approximation and delta-sigma ADCs in industrial data acquisition modules. Its 50 ppm/°C drift bounds total reference error over -40C to +125C, while the 25 mA output capability easily drives the dynamic reference current drawn by SAR ADCs during conversion. Decouple the output with 0.1 uF to 1 uF close to the ADC REF pin; the series bandgap architecture settles quickly after reference switching transients, preserving conversion accuracy without an external buffer in most mid-speed designs.
Recommended
Automotive Battery Monitoring
In 12V automotive battery-management nodes, the Q1-rated REF3030AIDBZR-Q1 provides the precision threshold for battery-voltage supervision and current-sense scaling across -40C to +125C. The 3V, ±0.2% output sets comparator trip points or ADC full-scale for state-of-charge estimation, where 1% reference error translates directly into SoC error. The SOT-23-3 package minimizes PCB area on dense BMS slave boards; pair it with an automotive current sensor and use a resistor divider from the battery node into the monitoring ADC referenced to this 3V rail.
Recommended
Sensor Excitation and Threshold Detection
Resistive bridges and ratiometric sensors benefit from the REF3030AIDBZR-Q1 as an excitation or threshold source: the ±0.2% initial accuracy limits span error, and 50 ppm/°C drift keeps bridge calibration valid over temperature. The 25 mA source capacity powers low-impedance dividers directly. Because the reference is a series type, the same rail can feed both the sensor excitation and the ADC reference for ratiometric operation, which cancels reference drift in the ratio - a common technique in pressure-sensor and potentiometer-position signal chains.
Recommended
Current-Sense Scaling Reference
The REF3030AIDBZR-Q1 offsets and scales current-sense amplifier outputs so that shunt-derived signals fit the ADC input range in automotive and industrial power monitoring. Using 3V as the ADC reference and the zero-current bias point yields a symmetric headroom of ±1.5V for bidirectional current measurement. The low 42 uA quiescent current permits continuous monitoring in always-on modules, and the Q1 temperature grade keeps the scaling accurate across the full automotive ambient range, protecting measurement integrity in engine-bay and underhood-adjacent environments.
Recommended
MCU and System Power Rail Supervision
System supervisors and reset comparators need a drift-stable trip reference; the REF3030AIDBZR-Q1 provides 3V with 50 ppm/°C drift for brownout and rail-monitoring thresholds in C2000 and MSPM0-based industrial and automotive control boards. The tiny SOT-23-3 footprint fits alongside supervisor logic without layout impact. Configure a resistor divider from the monitored rail to a comparator referenced to this 3V output so the trip threshold remains accurate over the full -40C to +125C range - far more stable than zener or regulator output as a threshold source.
Recommended
Recommended Products Summary
Engineering reference data for REF3030AIDBZR-Q1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | REF3030AIDBZR | REF1930 | REF3430AQDBZRQ1 | REF3033AIDBZR | MAX6037BAUT30 |
|---|---|---|---|---|---|---|
| Package | SOT-23-3 (DBZ) | SOT-23-3 (DBZ) - same | SOT-23-3 (DBZ) | SOT-23-3 (DBZ) | SOT-23-3 (DBZ) - same | SOT-23 (uMAX, 5-pin) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices (Maxim) |
| Output Voltage | 3 V | 3 V | 3 V | 3 V | 3.3 V | 3 V |
| Initial Accuracy | ±0.2% | ±0.2% | [DATA_NEEDED] | [DATA_NEEDED] | ±0.2% | [DATA_NEEDED] |
| Temperature Drift | 50 ppm/°C max | 50 ppm/°C max | [DATA_NEEDED] | [DATA_NEEDED] | 50 ppm/°C max | [DATA_NEEDED] |
| Output Current | 25 mA | 25 mA | [DATA_NEEDED] | [DATA_NEEDED] | 25 mA | [DATA_NEEDED] |
| Quiescent Current | 42 uA typical | 42 uA typical | [DATA_NEEDED] | [DATA_NEEDED] | 42 uA typical | [DATA_NEEDED] |
| Automotive Grade | Yes (Q1) | No | No | Yes (Q1) | No | No |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | [DATA_NEEDED] | -40°C to +125°C | -40°C to +125°C | [DATA_NEEDED] |
Key Differentiators
- Automotive Q1 grade with 42 uA quiescent current (vs REF3030AIDBZR)
- Lowest-power class in precision 3V references (vs MAX6037BAUT30)
- Upgrade path to tighter accuracy in the same footprint (vs REF3430AQDBZRQ1)
Design Notes
Place a 0.1 uF to 1 uF ceramic capacitor directly at VOUT within 2-3 mm of pin 3, with a low-impedance ground return to pin 2. The REF30xx series topology is stable with small ceramic capacitors, but layout parasitics on a dense automotive board can degrade transient response. Connect the GND pin to a clean analog ground plane, keeping high-current return paths (relay drivers, switching regulator loops) away from the reference ground connection to avoid offset errors.
Allow adequate input headroom above the 3V output per the REF30xx dropout specification in the TI datasheet; a series reference needs minimum margin to stay in regulation, so verify VIN under worst-case battery sag or cold-crank conditions in automotive systems. The 42 uA quiescent current plus load current defines total budget - at 25 mA full load the device dissipates (VIN - 3V) x 0.025 W, trivially small for SOT-23-3 thermal limits at automotive ambients.
Do not confuse REF3030 (3V) with REF3033 (3.3V) during BOM entry - same family and package, different output that scales ADC readings by 10%. Never substitute the non-Q1 REF3030AIDBZR in automotive builds without a formal qualification deviation. Also confirm the load-capacitor range in the REF30xx datasheet before adding large bulk capacitance; exceeding the stable range can cause start-up or transient anomalies.
Compliance Information
Q1 suffix denotes automotive-grade qualification per TI nomenclature. RoHS/lead-free per standard TI DBZ package compliance; verify REACH and halogen-free status on the TI product page.
