Texas Instruments REF4132A40DBVR

Overview

REF4132A40DBVR from Texas Instruments is a precision 4.096 V series voltage reference IC with ±0.05% initial accuracy, 12 ppm/°C max temperature coefficient (A grade), 100 µA max quiescent current, ±10 mA output drive capability, and 15 µV_PP (0.1–10 Hz) low-frequency noise-designed for high-resolution data acquisition systems requiring stable, low-drift excitation in industrial PLC analog I/O modules.

For engineers reviewing the REF4132A40DBVR datasheet, REF4132A40DBVR pinout, REF4132A40DBVR application, or REF4132A40DBVR equivalent, key selection criteria include dropout voltage at 10 mA load (500 mV), enable-controlled shutdown (2.5 µA), thermal hysteresis (35 ppm), long-term stability (30 ppm/1000 hrs), and SOT-23-5 package compatibility with LM4128/LM4132 footprints.

Technical Context

The REF4132A40DBVR implements a CMOS-based bandgap core with integrated output buffer and enable-controlled shutdown logic. Its architecture delivers low 1/f noise via optimized biasing and achieves tight initial accuracy through laser trimming of on-die resistors.

It operates across −40°C to +125°C with guaranteed line regulation (2 ppm/V) and load regulation (20 ppm/mA) under specified conditions, supporting rail-to-rail operation down to 50 mV dropout at zero load while maintaining 15 µV_PP noise performance into 10 µF capacitive loads.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, JEDEC MO-178AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF4132A40DBVR, REF43A40DBVR trades lower power for higher accuracy, while ADR4540BRZ offers dramatically lower drift at the cost of size and current-making REF4132A40DBVR the optimal balance for space-constrained, low-power industrial DAQ where 12 ppm/°C drift is sufficient.

Availability

REF4132A40DBVR is available at Aetrix Electronics and suitable for PLC analog I/O modules, field transmitters, and motor drive control modules requiring stable component supply with guaranteed long-term continuity and traceable sourcing.

Supply support for REF4132A40DBVR 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The REF4132 product line was developed specifically for high-precision, low-power data acquisition systems operating across extended industrial temperatures, emphasizing low noise, minimal drift, and small-footprint integration.

FAQ

What is the maximum load current supported by the REF4132A40DBVR?

The REF4132A40DBVR supports ±10 mA output current-capable of sourcing and sinking up to 10 mA while maintaining specified accuracy and noise performance. At 10 mA load, dropout voltage is 500 mV, requiring minimum VIN = 4.596 V. Short-circuit protection limits output current to 18 mA to prevent damage.

Does the REF4132A40DBVR require external capacitors, and if so, what values are recommended?

Yes, the REF4132A40DBVR requires external capacitors for stability and noise reduction. A 0.1 µF ceramic capacitor is mandatory at the VREF output; an additional 1–10 µF ceramic or electrolytic capacitor may be added in parallel for improved transient response. A 0.1 µF ceramic capacitor is also required at VIN, with optional 1–10 µF bulk capacitance for supply filtering.

How does the enable (EN) pin function on the REF4132A40DBVR?

The EN pin on the REF4132A40DBVR controls active/shutdown modes: applying ≥1.6 V enables normal operation with 100 µA quiescent current; applying ≤0.5 V places the device in shutdown mode with ≤2.5 µA supply current and high-impedance VREF output. Voltages between 0.5 V and 1.6 V must be avoided to prevent undefined behavior and excessive current draw.

Is the REF4132A40DBVR pin-compatible with older TI voltage references?

Yes, the REF4132A40DBVR is pin-to-pin compatible with LM4128A40IDBVR and LM4132A40IDBVR in the SOT-23-5 (DBV) package. It provides enhanced specifications-including lower temperature coefficient (12 ppm/°C vs. 20 ppm/°C), lower noise (15 µV_PP vs. 20 µV_PP), and improved long-term stability-without requiring PCB redesign.

What is the long-term stability specification for the REF4132A40DBVR, and how is it measured?

The REF4132A40DBVR exhibits 30 ppm typical long-term stability over 1000 hours at 35°C, measured per JEDEC JESD22-A117. This value reflects average drift across 32 units tested continuously; actual unit drift may vary. For mission-critical applications, TI recommends burn-in to mitigate early-life drift before final system calibration.