Texas Instruments DRV411AIRGPR

Overview

DRV411AIRGPR from Texas Instruments is a sensor signal conditioning IC optimized for closed-loop magnetic current sensors using symmetric InSb Hall elements (e.g., AKM HW-322/HW-302). It integrates Hall excitation (0.7–0.95 V, 10 mA max), 250-mA H-bridge compensation driver, precision differential amplifier (±0.1 mV offset, 200 kHz bandwidth), and pin-selectable 2.5 V / 1.65 V / ratiometric reference - enabling high-accuracy DC/AC current measurement in industrial power systems.

For engineers reviewing the DRV411AIRGPR datasheet, DRV411AIRGPR pinout, DRV411AIRGPR application, or DRV411AIRGPR equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in isolated current sensing, and confirmed alternative options for closed-loop Hall-based current sensor modules.

Technical Context

The DRV411AIRGPR employs spinning-current excitation at 1 MHz to eliminate Hall sensor offset and 1/f noise, with front-end open-loop gain configurable via GSEL pins (100–250 V/V) and gain-bandwidth product up to 14 MHz. Its proprietary offset-cancelling architecture achieves ≤100 µV front-end offset and ≤2 µV/°C drift over –40°C to +125°C.

The integrated Class AB H-bridge drives compensation coils with ±250 mA peak current into 20-Ω loads, supporting voltage swings up to 4.2 VPP at 5 V supply. The differential amplifier features 4 V/V fixed gain, ±0.3% gain error, and 2 MHz –3 dB bandwidth, referenced to either internal buffered voltage (2.5 V/1.65 V) or external ratiometric input.

Key Specifications

Pinout & Package

DRV411AIRGPR is housed in a thermally enhanced 4-mm × 4-mm QFN-20 package (RGP) with exposed thermal pad (to be connected to GND). This package provides 33.8°C/W junction-to-ambient thermal resistance and supports high-power-density current sensor module designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar closed-loop Hall current sensor applications.

Compared with DRV401AIRGPR and ACS724LLCBTR-20AU-T, the DRV411AIRGPR uniquely combines on-chip 250-mA compensation drive, pin-selectable reference, and spinning-current offset cancellation - making it the only option capable of supporting scalable, high-accuracy (>0.1%) closed-loop current sensors above ±500 A with user-defined core geometry.

Availability

DRV411AIRGPR is available at Aetrix Electronics and suitable for industrial motor drives, EV onboard chargers, and renewable energy inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for DRV411AIRGPR 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 precision signal conditioning and high-reliability industrial ICs.

The DRV411AIRGPR belongs to TI's sensor signal conditioning product line, engineered specifically for high-accuracy closed-loop magnetic current sensing in demanding industrial and automotive applications.

FAQ

What is the primary function of the DRV411AIRGPR in a current sensor module?

The DRV411AIRGPR serves as the complete signal conditioning core for closed-loop magnetic current sensors. It excites symmetric Hall elements (e.g., AKM HW-322), cancels offset and 1/f noise via spinning-current technique, drives the compensation coil with ±250 mA, and conditions the shunt voltage into a precise analog output. Its integrated 2.5 V / 1.65 V reference eliminates external components. The DRV411AIRGPR enables high-accuracy DC/AC current measurement without calibration across –40°C to +125°C.

How does the spinning-current excitation in DRV411AIRGPR improve measurement accuracy?

The DRV411AIRGPR applies 1-MHz excitation current through four orthogonal paths in the Hall element (HALL1–HALL4), averaging the outputs to cancel intrinsic offset and 1/f noise. This dynamic method reduces front-end voltage offset to ≤100 µV and drift to ≤2 µV/°C - far exceeding static excitation methods. The DRV411AIRGPR continuously monitors Hall offset and asserts the ERROR pin if >50 mV is detected, ensuring reliability. This architecture makes the DRV411AIRGPR ideal for high-stability applications like motor control and energy metering.

Can DRV411AIRGPR operate with both 3.3 V and 5 V supply rails?

Yes, the DRV411AIRGPR operates from a single supply of 2.7 V to 5.5 V. At 3.3 V, its H-bridge delivers ±150 mA peak current with 2.5 VPP swing; at 5 V, it delivers ±250 mA with 4.2 VPP swing. The pin-selectable reference supports 1.65 V (for 3.3 V ADCs) or 2.5 V (for 5 V systems), and the ratiometric mode (REFSEL = [1,1]) outputs 50% of VDD. All specifications - including 200 kHz bandwidth and ±0.1 mV amplifier offset - are guaranteed across this full supply range, making the DRV411AIRGPR compatible with mixed-voltage industrial designs.

What are the key thermal considerations when using DRV411AIRGPR in high-current applications?

The DRV411AIRGPR uses a 4-mm × 4-mm QFN-20 (RGP) package with an exposed thermal pad that must be soldered to a GND plane for optimal heat dissipation. Its junction-to-ambient thermal resistance is 33.8°C/W, and junction-to-board is just 11.1°C/W. In continuous 250-mA H-bridge operation, PCB copper area and thermal vias under the pad are critical to maintain junction temperature below +150°C. The device includes thermal shutdown and is rated for operation up to +125°C ambient - essential for enclosed motor drive enclosures or EV charger modules where airflow is limited. The DRV411AIRGPR's thermal design directly impacts long-term offset stability and lifetime reliability.

How do the ERROR and OR pins function in DRV411AIRGPR-based systems?

The ERROR pin is an open-drain output that goes low when Hall sensor offset exceeds 50 mV - indicating potential damage or disconnection. The OR (overrange) pin goes low when the differential amplifier output exceeds ±75 mV, signaling magnetic saturation or excessive primary current. Both pins respond within 2.5–3.5 µs and require external pull-up resistors. These flags enable real-time system diagnostics and fast shutdown in safety-critical applications like industrial servo drives or EV battery management. Because they are independent of the analog output path, the DRV411AIRGPR ensures robust fault detection even during transient overload events.