Texas Instruments REF2930AIDBZTG4

Overview

REF2930AIDBZTG4 from Texas Instruments is a precision 3.0 V CMOS band-gap 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 min dropout voltage. It serves as a stable, low-power reference for ADCs, DACs, and portable instrumentation where supply headroom and thermal stability are critical.

For engineers reviewing the REF2930AIDBZTG4 datasheet, REF2930AIDBZTG4 pinout, REF2930AIDBZTG4 application, or REF2930AIDBZTG4 equivalent, key selection criteria include output voltage tolerance at –40°C to 125°C, load regulation under 25 mA, noise performance below 100 µV_rms, and compatibility with capacitive loads without external compensation.

Technical Context

The REF2930AIDBZTG4 implements a curvature-compensated band-gap topology using two bipolar transistors (Q1, Q2) biased at different current densities, generating a PTAT voltage across R1 that offsets the NTAT V_BE of Q2. Its CMOS output stage enables rail-to-rail operation with no mandatory load capacitor, while maintaining stability across all capacitive loads.

It operates over –40°C to 125°C with guaranteed 25 mA sink capability, 33 µV_PP (0.1–10 Hz) and 94 µV_rms (10 Hz–10 kHz) output noise, and thermal hysteresis ≤100 ppm - enabling use in industrial data acquisition and medical-grade analog front-ends without calibration overhead.

Key Specifications

Pinout & Package

SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6126AUT30+ and ADR3430ARJZ-R7, REF2930AIDBZTG4 trades absolute precision for ultra-low power, minimal dropout, and 3-pin simplicity - making it optimal for cost-sensitive, battery-constrained designs where ±2% accuracy and 100 ppm/°C drift are acceptable.

Availability

REF2930AIDBZTG4 is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial PLC analog input modules requiring stable component supply with consistent lead times and traceable sourcing.

Supply support for REF2930AIDBZTG4 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 components.

The REF29xx family was designed specifically for low-power, high-accuracy voltage referencing in portable, battery-operated, and wide-temperature industrial systems - prioritizing dropout, quiescent current, and thermal stability over ultra-fine initial tolerance.

FAQ

What is the minimum input voltage required for REF2930AIDBZTG4 to deliver full 25 mA load current?

The REF2930AIDBZTG4 requires a minimum input voltage of VOUT + 50 mV (i.e., 3.05 V) to sustain 25 mA load current across –40°C to 125°C, per Recommended Operating Conditions. At room temperature and zero load, it operates down to VOUT + 1 mV (3.001 V), but load-dependent dropout increases linearly with current - confirmed in Figure 12 and Section 7.5 Electrical Characteristics.

Does REF2930AIDBZTG4 require an output capacitor for stability?

No, REF2930AIDBZTG4 does not require an output capacitor and remains stable with any capacitive load, including zero capacitance. This is explicitly stated in the Description section and validated in Figure 29 (Typical Connections). A 0.47 µF bypass capacitor on the input (IN pin) is recommended, but the output is intentionally designed for capacitor-free operation to reduce BOM count and PCB area.

What is the typical output voltage noise of REF2930AIDBZTG4, and how is it measured?

REF2930AIDBZTG4 delivers 33 µV_PP (peak-to-peak) noise over 0.1 Hz to 10 Hz, and 94 µV_rms over 10 Hz to 10 kHz - values measured per standard JEDEC test conditions at TA = 25°C, I_LOAD = 0 mA, and V_IN = 5 V. These figures are specified in Section 7.5 Electrical Characteristics and correlate directly with achievable effective number of bits (ENOB) in precision ADC systems.

Can REF2930AIDBZTG4 be used in automotive applications?

Yes, REF2930AIDBZTG4 is rated for –40°C to 125°C operating temperature and qualified per TI's automotive-grade reliability standards. Its 100 ppm/°C max drift, 25 mA output drive, and robust ESD rating (±4000 V HBM) make it suitable for non-safety-critical automotive subsystems such as cabin sensors, infotainment power management, and body control modules - though system-level ASIL compliance must be validated separately.

How does the long-term stability of REF2930AIDBZTG4 impact calibration intervals in field-deployed equipment?

REF2930AIDBZTG4 exhibits 24 ppm drift over the first 1000 hours and 15 ppm over the subsequent 1000 hours (Section 8.3.5), totaling ≤39 ppm over 2000 hours (~83 days of continuous operation). This translates to <±0.012% output shift - enabling multi-year calibration intervals in industrial data loggers and medical monitors without sacrificing measurement integrity.