Texas Instruments REF2930AIDBZT

Overview

REF2930AIDBZT from Texas Instruments is a precision 3.0 V CMOS voltage reference in a 3-pin SOT-23 package, delivering ±2% initial accuracy, 100 ppm/°C max temperature drift, 50 µA max quiescent current, and 1 mV typical dropout voltage. It serves as a stable, low-power reference for analog-to-digital converters and portable instrumentation where supply headroom and long-term stability are critical.

For engineers reviewing the REF2930AIDBZT datasheet, REF2930AIDBZT pinout, REF2930AIDBZT application, or REF2930AIDBZT equivalent, key selection criteria include its 3.0 V output tolerance, ultra-low IQ across –40°C to 125°C, load regulation of ≤100 µV/mA, and compatibility with capacitive loads without external compensation.

Technical Context

The REF2930AIDBZT implements a curvature-compensated band-gap topology with dual NPN transistors (Q1/Q2) biased for unequal current density, generating a PTAT voltage across R1 that offsets Q2's CTAT V_BE. This architecture achieves <50 ppm typical drift over 0°C–70°C and maintains stability without output capacitance.

Its CMOS design enables operation with input voltage as low as V_OUT + 1 mV under no-load conditions and supports up to 25 mA output current while maintaining 33 µV_PP (0.1–10 Hz) noise performance and 94 µV_RMS (10 Hz–10 kHz) noise - critical for high-resolution data acquisition systems.

Key Specifications

Pinout & Package

SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body size, 3-pin surface-mount with gull-wing leads. Thermal resistance R_θJA = 297.3°C/W; R_θJB = 91.7°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage reference applications.

Compared with MAX6030AESA+ and ADR3430ARJZ-R7, REF2930AIDBZT offers the smallest footprint and lowest quiescent current among 3.0 V references, making it optimal for space- and power-constrained designs where ±2% accuracy and 100 ppm/°C drift are acceptable.

Availability

REF2930AIDBZT is available at Aetrix Electronics and suitable for portable medical sensors, data acquisition systems, hand-held test equipment, and battery management units requiring stable component supply with guaranteed long-term continuity.

Supply support for REF2930AIDBZT 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 over 90 years of innovation in precision analog ICs and power management solutions.

The REF29xx family was designed specifically for low-power, high-accuracy voltage referencing in portable and industrial systems - emphasizing micro-size packaging, ultra-low IQ, and robust thermal performance across extended temperature ranges.

FAQ

What is the minimum input voltage required for stable operation of the REF2930AIDBZT?

The REF2930AIDBZT requires a minimum input voltage of V_OUT + 1 mV (i.e., 3.001 V) under no-load conditions. With 25 mA load, the minimum input rises to V_OUT + 50 mV (3.05 V), per the recommended operating conditions in the datasheet. Operation below these thresholds risks regulation loss and increased output drift.

Does the REF2930AIDBZT require an output capacitor for stability?

No, the REF2930AIDBZT is internally compensated and remains stable with any capacitive load - including zero capacitance. Unlike many references, it does not require an external output capacitor for phase margin or transient response, simplifying layout and reducing BOM count.

What is the long-term stability specification for the REF2930AIDBZT?

The REF2930AIDBZT exhibits 24 ppm drift over the first 1000 hours and 15 ppm drift from 1000 to 2000 hours of continuous operation, based on characterization of 30 units. This long-term stability supports applications requiring minimal recalibration over multi-year service intervals.

How does thermal hysteresis affect the REF2930AIDBZT's output voltage?

Thermal hysteresis for the REF2930AIDBZT is specified at 25 ppm maximum - defined as the output voltage change after cycling from 25°C → –40°C → 125°C → 25°C. This parameter quantifies residual offset due to package stress and ensures repeatable accuracy after environmental excursions.

Can the REF2930AIDBZT drive a 25 mA load across the full temperature range?

Yes, the REF2930AIDBZT is rated for 25 mA output current from –40°C to 125°C. Its CMOS output stage maintains regulation within specifications across this range, with load regulation ≤100 µV/mA and dropout voltage ≤50 mV at full load - verified in electrical characteristics tables.