Texas Instruments REF35250QDBVR

Overview

REF35250QDBVR from Texas Instruments is a 2.5V ultra-low-power, high-precision series voltage reference in a 6-pin SOT-23 package. It delivers ±0.05% initial accuracy, 12ppm/°C max temperature coefficient (−40°C to 105°C), 650nA typical quiescent current, and 3.3ppm_P-P (0.1Hz–10Hz) output noise - enabling precision sensor biasing and 12–16-bit data converter reference in battery-powered industrial instrumentation.

For engineers reviewing the REF35250QDBVR datasheet, REF35250QDBVR pinout, REF35250QDBVR application, or REF35250QDBVR equivalent, key selection criteria include nanopower operation with EN/NR pins, thermal hysteresis (70ppm), long-term stability (40ppm at 1k hour), load regulation (20ppm/mA sourcing), and dropout voltage (120mV at 5mA).

Technical Context

The REF35250QDBVR implements a bandgap-based series reference architecture with integrated enable (EN) and noise reduction (NR) terminals. Its low-drift design achieves 12ppm/°C TC over −40°C to +105°C while maintaining 650nA active-mode IQ and supporting ±5mA sink/source capability.

It operates from V_IN = V_REF + V_DO (min 1.7V for lower V_REF, but ≥2.62V for 2.5V output) up to 6V, with 0.1μF input and 0.1–10μF output capacitance requirements. The device features 2ms turn-on time (0.1% settling, C_L = 1μF) and 70ppm thermal hysteresis after −40°C ↔ 105°C cycling.

Key Specifications

Pinout & Package

REF35250QDBVR is packaged in a 6-pin SOT-23 (DBV) with 2.90mm × 1.60mm body size. Pin 1 and Pin 2 are internally shorted GND connections; NR pin supports external capacitor for noise filtering; EN pin enables shutdown mode (<0.5µA IQ).

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF35250QDBVR, REF3425QPWR offers tighter accuracy and TC but consumes >5× more current and lacks integrated enable, while ADR3425ARMZ trades nanopower operation for lower cost and wider temp range - making REF35250QDBVR optimal for space- and energy-constrained portable instrumentation.

Availability

REF35250QDBVR is available at Aetrix Electronics and suitable for flow transmitters, blood glucose monitors, and servo drive control modules requiring stable component supply with guaranteed long-term parametric consistency and TI's extended product lifecycle support.

Supply support for REF35250QDBVR 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 reliability.

The REF35 family is designed for ultra-low-power, high-accuracy voltage referencing in portable, battery-operated, and thermally demanding applications - targeting medical diagnostics, industrial sensing, and test equipment where nanoscale current budgets coexist with ppm-level stability requirements.

FAQ

What is the maximum operating temperature range for the REF35250QDBVR?

The REF35250QDBVR is functional from −55°C to +125°C. Its guaranteed specifications - including ±0.05% initial accuracy and 12ppm/°C temperature coefficient - apply over −40°C to +105°C. This makes REF35250QDBVR suitable for under-hood automotive subsystems and industrial servo drives where extended thermal margins are required.

Does the REF35250QDBVR require an external capacitor on the NR pin?

No, the NR pin of the REF35250QDBVR may be left floating if noise reduction is not required. When used, a 1–10µF capacitor to GND reduces 0.1Hz–10Hz output noise by up to 50%. The REF35250QDBVR remains fully operational and stable without any NR capacitor, simplifying layout in space-constrained designs where ultra-low noise is secondary to size or cost.

Can the REF35250QDBVR sink current, and what is its rated sink capability?

Yes, the REF35250QDBVR can both source and sink current. It is rated for −5mA sink capability with 40ppm/mA load regulation (sinking). This bidirectional output supports active pull-down configurations, such as biasing current-sense amplifier inputs or driving low-side reference loads in precision current measurement circuits using the REF35250QDBVR.

How does the REF35250QDBVR handle input voltage dropout conditions?

The REF35250QDBVR has a specified dropout voltage of 120mV at 5mA load and 250mV at 10mA. With a 2.5V output, it operates down to VIN = 2.62V (2.5V + 120mV) - enabling compatibility with single-cell Li-ion (2.7–4.2V) or regulated 3.3V supplies. Below dropout, output regulation degrades linearly; the device does not latch or fail, preserving system robustness in brown-out scenarios.

Is the REF35250QDBVR pin-compatible with other members of the REF35 family?

Yes, all REF35x QDBVR variants - including REF35102QDBVR, REF35125QDBVR, and REF35250QDBVR - share identical 6-pin SOT-23 (DBV) pinout, footprint, and terminal functions. This allows direct voltage-output substitution within the same PCB layout, provided input voltage, load, and noise requirements remain compatible across the selected VREF option.