Texas Instruments REF4132B30DBVRQ1

Overview

REF4132B30DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified series voltage reference delivering 3.0 V output with ±0.05% initial accuracy, 30 ppm/°C max temperature coefficient (B grade), and ±10 mA output current capability in a 5-pin SOT-23 package. It operates from −40°C to +125°C and supports precision ADC biasing in ADAS front camera and traction inverter systems.

For engineers reviewing the REF4132B30DBVRQ1 datasheet, REF4132B30DBVRQ1 pinout, REF4132B30DBVRQ1 application, or REF4132B30DBVRQ1 equivalent, key selection criteria include dropout voltage at 10 mA (500 mV), quiescent current ≤100 µA, low-frequency noise (15 µV_PP), thermal hysteresis (35 ppm), and enable-controlled shutdown mode.

Technical Context

The REF4132B30DBVRQ1 implements a CMOS-based bandgap core with integrated output buffer and enable logic, supporting active and shutdown modes via the EN pin. Its architecture achieves low 1/f noise through optimized die layout and trimming, while maintaining stable output under load transients up to ±10 mA.

It features a 50–500 mV dropout range depending on load, operates with input voltages as low as V_REF + V_DO, and maintains <20 ppm/mA load regulation and <2 ppm/V line regulation across temperature. The device uses no-connect (N/C) pin 1 for package symmetry and thermal performance optimization.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, 1.3 mm height, surface-mount with gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM4132B30IDBVRQ1 and MAX6033BAUT30+T, REF4132B30DBVRQ1 delivers superior thermal stability, lower power consumption, and full automotive qualification-making it the only choice for ASIL-B–compliant ADAS and powertrain subsystems requiring guaranteed performance across extreme temperature excursions.

Availability

REF4132B30DBVRQ1 is available at Aetrix Electronics and suitable for ADAS front camera, traction inverter, and HEV/EV on-board charger applications requiring stable component supply with full automotive traceability and PPAP support.

Supply support for REF4132B30DBVRQ1 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 automotive-grade components.

The REF4132-Q1 product line was designed specifically for high-reliability automotive applications demanding low drift, low noise, and AEC-Q100 qualification-targeting ADAS, powertrain, and electrification systems where reference stability directly impacts functional safety compliance.

FAQ

What is the maximum load current supported by the REF4132B30DBVRQ1?

The REF4132B30DBVRQ1 supports ±10 mA output current, meaning it can source up to 10 mA and sink up to 10 mA while maintaining specified accuracy and stability. At 10 mA load, dropout voltage is 500 mV max, requiring a minimum input voltage of 3.5 V. This capability enables direct driving of ADC reference inputs, op-amp bias networks, and small-signal comparators without external buffering.

Does the REF4132B30DBVRQ1 require external capacitors, and if so, what values are recommended?

Yes, the REF4132B30DBVRQ1 requires external capacitors for stability and noise reduction. A 0.1 µF ceramic capacitor is mandatory at the VREF output; additional 1–10 µF capacitance (ceramic or electrolytic) may be added to improve transient response. A 0.1 µF ceramic capacitor is also required at VIN, and a 1–10 µF bulk capacitor is recommended. These values are validated per TI's layout guidelines and ensure stability across the full operating temperature range.

How does the enable (EN) pin function on the REF4132B30DBVRQ1?

The EN pin on the REF4132B30DBVRQ1 controls active/shutdown modes: logic high (≥1.6 V) enables normal operation with ≤100 µA quiescent current; logic low (≤0.5 V) places the device in shutdown mode with ≤5 µA supply current and high-impedance VREF output. The EN pin draws ≤2 µA and must not exceed VIN. Intermediate voltages (0.5–1.6 V) cause undefined behavior and must be avoided in system design.

Is the REF4132B30DBVRQ1 qualified for automotive use, and what standards does it meet?

Yes, the REF4132B30DBVRQ1 is AEC-Q100 qualified for automotive applications, specifically Grade 1 (−40°C to +125°C ambient). It meets HBM ESD classification Level 2 (±2500 V), has undergone thermal hysteresis and long-term stability characterization, and is manufactured in TI's IATF 16949–certified facilities. Full qualification documentation, including test reports and PPAP support, is available through Aetrix Electronics.

What is the typical low-frequency noise performance of the REF4132B30DBVRQ1?

The REF4132B30DBVRQ1 delivers 15 µV_PP (peak-to-peak) output noise over the 0.1 Hz to 10 Hz bandwidth, measured at nominal 3.0 V output. This low 1/f noise performance is critical for high-resolution data acquisition systems such as 24-bit delta-sigma ADCs used in automotive current sensing and battery monitoring. Noise remains stable across temperature and load conditions per TI's characterization data.