Texas Instruments DRV5056A4QDBZR

Overview

DRV5056A4QDBZR from Texas Instruments is a unipolar ratiometric linear Hall-effect sensor in SOT-23 package, designed for precise analog position sensing using magnetic south-pole flux. It delivers 25 mV/mT sensitivity at 5 V, supports 158 mT linear range, operates from 3.3 V or 5 V supplies, and features 20 kHz bandwidth with 0.6 V quiescent output-enabling high-accuracy displacement measurement in industrial actuators and medical devices.

For engineers reviewing the DRV5056A4QDBZR datasheet, DRV5056A4QDBZR pinout, DRV5056A4QDBZR application, or DRV5056A4QDBZR equivalent, key selection criteria include magnetic sensitivity tolerance (±1.2 mV/mT), quiescent voltage drift (±0.08 V over –40°C to +125°C), ratiometric error (±2.5%), and magnet temperature compensation coefficient (0.12%/°C) for NdFeB magnet drift correction.

Technical Context

The DRV5056A4QDBZR implements a fully integrated analog signal chain including Hall element biasing, offset cancellation, precision amplification, and temperature-compensated gain scaling. Its ratiometric architecture ensures output voltage scales linearly with VCC, enabling consistent ADC digitization when the same supply powers both sensor and reference.

It uses a unipolar response optimized for south-pole detection only, with magnetic flux sensed perpendicular to the top surface of the SOT-23 package. The device incorporates mechanical stress cancellation and on-die trimming to maintain linearity (±1%) across its 158 mT full-scale range at 25°C.

Key Specifications

Pinout & Package

SOT-23 (DBZ) 3-pin surface-mount package: 2.92 mm × 2.37 mm footprint with gull-wing leads, optimized for automated assembly and compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear Hall-effect sensor applications.

Compared with DRV5055A4QDBZR, the DRV5056A4QDBZR adds magnet temperature compensation for improved stability across –40°C to +125°C; compared with TMAG5170AHQDBTR, it provides simpler analog integration and lower BOM cost but lacks multi-axis capability and digital configurability.

Availability

DRV5056A4QDBZR is available at Aetrix Electronics and suitable for industrial automation, medical device manufacturing, and automotive subsystems requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for DRV5056A4QDBZR 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 leader specializing in analog and embedded processing technologies, with decades of expertise in magnetic sensing and precision analog IC design.

The DRV5056 product line delivers unipolar ratiometric Hall-effect sensors optimized for high-accuracy, temperature-stable position feedback in harsh industrial and medical environments.

FAQ

What is the magnetic polarity response of the DRV5056A4QDBZR?

The DRV5056A4QDBZR responds exclusively to magnetic south poles applied perpendicular to the top surface of its SOT-23 package. It produces a rising analog output voltage starting from 0.6 V quiescent level as south-pole flux density increases. North-pole fields produce no measurable output change, ensuring unambiguous directional sensing in applications like linear actuators and rotary encoders.

How does the ratiometric architecture of the DRV5056A4QDBZR improve system accuracy?

The DRV5056A4QDBZR's ratiometric architecture causes its sensitivity and output voltage scale linearly with VCC. When the same supply powers both the DRV5056A4QDBZR and the ADC reference, supply voltage tolerances cancel out-reducing total system error by up to ±2.5% compared to non-ratiometric sensors. This eliminates need for precision voltage references in cost-sensitive designs.

What is the purpose of magnet temperature compensation in the DRV5056A4QDBZR?

The DRV5056A4QDBZR applies 0.12%/°C sensitivity increase to compensate for the natural flux decay of neodymium magnets as temperature rises. This preserves linear output vs. position across –40°C to +125°C, critical for medical devices and industrial equipment operating in variable thermal environments. Without this, position error could exceed ±5% over full temperature range.

Can the DRV5056A4QDBZR detect wire break or short-circuit faults?

Yes-the DRV5056A4QDBZR supports wire fault detection via external pull-up resistor (20–100 kΩ) from OUT to VCC. Under normal operation, output stays within 0.6–4.8 V. If VOUT reads near GND, VCC disconnect or GND short is indicated; if near VCC, VCC disconnect or GND open is flagged. This meets basic functional safety requirements for automotive and industrial applications.

What is the recommended PCB layout practice for minimizing noise on the DRV5056A4QDBZR output?

Place a 0.1 µF ceramic decoupling capacitor between VCC and GND as close as possible to the DRV5056A4QDBZR pins. Route the OUT trace away from noisy digital signals and high-current paths. For noise-sensitive applications, add an RC low-pass filter (e.g., 10 kΩ + 1 nF) at the ADC input-not directly at OUT-to avoid instability while reducing 20 kHz bandwidth noise by >40 dB.