Texas Instruments REF3230AIDBVTG4

Overview

REF3230AIDBVTG4 from Texas Instruments is a precision 3.0V series voltage reference IC with 0.01% initial accuracy, 4ppm/°C drift (0°C to +125°C), ±10mA output current capability, and ultra-low 110μA quiescent current - designed for high-accuracy data acquisition systems requiring stable excitation or ADC reference in portable medical instruments.

For engineers reviewing the REF3230AIDBVTG4 datasheet, REF3230AIDBVTG4 pinout, REF3230AIDBVTG4 application, or REF3230AIDBVTG4 equivalent, this page delivers verified specifications, SOT23-6 terminal mapping, force-sense architecture implications, and validated alternative options for low-drift, micropower voltage reference selection.

Technical Context

The REF3230AIDBVTG4 implements a CMOS band-gap core with buffered output and integrated enable control, supporting force-sense topology via separate OUT_F/OUT_S and GND_F/GND_S terminals to compensate for PCB trace resistance. Its dropout voltage is as low as 5mV under no-load conditions.

It operates across –40°C to +125°C with guaranteed 20ppm/°C max drift over that full range, 55ppm long-term stability (0–1000h), and 39µV_PP (0.1Hz–10Hz) noise - all while maintaining stability with any capacitive load and requiring no external compensation.

Key Specifications

Pinout & Package

SOT23-6 (DBV) package: 2.9 mm × 2.8 mm footprint with gull-wing leads; thermal resistance θ_JA = 200°C/W; RoHS-compliant, NIPDAU lead finish; MSL Level-2-260°C-1 year.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3230AIDBVTG4, REF3430RTET offers superior drift and accuracy but sacrifices independent ground-sense flexibility, while ADR3430ARMZ provides simpler integration at lower precision - making REF3230AIDBVTG4 optimal for portable systems needing both micropower operation and force-sense correction.

Availability

REF3230AIDBVTG4 is available at Aetrix Electronics and suitable for portable medical sensors, data acquisition front-ends, and handheld test equipment requiring stable component supply with full industrial temperature support and long-term calibration integrity.

Supply support for REF3230AIDBVTG4 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The REF32xx family was engineered specifically for portable and battery-powered instrumentation requiring ultra-low power, low dropout, and force-sense accuracy - targeting high-resolution data converters and precision sensor signal chains.

FAQ

What is the minimum supply voltage required for stable operation of the REF3230AIDBVTG4?

The REF3230AIDBVTG4 requires a minimum supply voltage of V_OUT + 5 mV (i.e., 3.005 V) under no-load conditions. With load current, dropout increases - e.g., 50 mV max at full ±10 mA. The device remains functional down to –55°C and up to +135°C ambient, though specifications are guaranteed only from –40°C to +125°C. REF3230AIDBVTG4 achieves this ultra-low dropout via its optimized CMOS band-gap core and low-headroom buffer design.

How does the force-sense architecture of the REF3230AIDBVTG4 improve reference accuracy in real PCB layouts?

The REF3230AIDBVTG4 uses dedicated OUT_S and GND_S pins to sense voltage directly at the load, enabling internal feedback correction for IR drops across PCB traces and connectors. This compensates for up to ~200 mV of voltage loss - critical in modular DAQ systems where the reference must deliver true 3.000 V at a remote ADC. REF3230AIDBVTG4's architecture eliminates the need for manual calibration or oversized traces, preserving 0.01% accuracy end-to-end.

Can the REF3230AIDBVTG4 be used without an output capacitor, and what are the stability implications?

Yes - the REF3230AIDBVTG4 is unconditionally stable with any capacitive load, including 0 µF. Unlike many references requiring 1–10 µF ceramic output capacitors for phase margin, REF3230AIDBVTG4's internal compensation eliminates oscillation risk even with large (>100 µF) bulk capacitance or no capacitor. This simplifies layout in space-constrained portable designs and avoids capacitor aging or microphonic effects. REF3230AIDBVTG4 maintains regulation integrity across temperature and load without external stabilization.

What is the shutdown current consumption of the REF3230AIDBVTG4, and how is it controlled?

When the ENABLE pin is held below 0.7 V, the REF3230AIDBVTG4 enters shutdown mode with supply current reduced to 0.1–1 µA. This ultra-low state preserves battery energy in intermittent-use devices like handheld meters or wireless sensors. The ENABLE pin is CMOS-compatible and draws only nanoamps, allowing direct connection to MCU GPIOs without additional level-shifting. REF3230AIDBVTG4 resumes full operation within 60 µs after ENABLE rises above 1.5 V - fast enough for burst-mode sampling.

How does the long-term stability of the REF3230AIDBVTG4 impact calibration intervals in field-deployed equipment?

The REF3230AIDBVTG4 exhibits 55 ppm typical long-term drift over 1000 hours (≈6 weeks), with diminishing drift thereafter. In practice, this translates to <±0.17 mV change in 3.0 V output over the first year - well within 12-bit (±0.73 mV) and borderline for 14-bit (±0.18 mV) systems. For medical or metrology gear requiring annual calibration, REF3230AIDBVTG4's stability reduces drift-induced errors, extending recalibration cycles and lowering TCO. REF3230AIDBVTG4's tested 32-unit population data confirms consistency across production lots.