Texas Instruments TMAG5273B1QDBVR

Overview

TMAG5273B1QDBVR from Texas Instruments is a low-power linear 3D Hall-effect sensor IC with integrated X/Y/Z magnetic sensing, 12-bit ADC, I²C interface, and on-chip temperature sensor. It delivers ±40 mT / ±80 mT configurable magnetic range per axis, 20 kSPS single-axis conversion rate, and ultra-low 5 nA sleep current - enabling precise angular position detection in battery-powered smart locks and e-bike motor control systems.

For engineers reviewing the TMAG5273B1QDBVR datasheet, TMAG5273B1QDBVR pinout, TMAG5273B1QDBVR application, or TMAG5273B1QDBVR equivalent, key selection considerations include its factory-programmed 0x22 I²C address, SOT-23-6 package constraints, wake-up-and-sleep timing behavior, CORDIC-based angle computation, and magnetic sensitivity drift (±5% typ) across –40°C to +125°C.

Technical Context

The TMAG5273B1QDBVR implements three orthogonal Hall plates multiplexed into a shared 12-bit sigma-delta ADC, with digital gain/offset correction and integrated CORDIC engine for full 360° angle calculation using any two axes. Its power management supports four functional modes: standby (0.45 mA), active (2.3 mA), wake-up-and-sleep (1.0–160 µA), and deep sleep (5 nA).

It features dual-mode interrupt generation (INT pin or SCL pin), programmable magnetic thresholds per axis, factory-set I²C address 0x22 (7-bit), CRC-protected I²C frames, and temperature-compensated magnetic response with selectable MAG_TEMPCO coefficients (0%, 0.12%/°C, or 0.2%/°C).

Key Specifications

Pinout & Package

TMAG5273B1QDBVR is housed in a 6-pin SOT-23 (DBV) package measuring 2.9 mm × 2.8 mm, optimized for space-constrained PCB layouts in handheld and wearable electronics.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3D Hall-effect sensor applications.

Compared with TMAG5273B1QDBVR, TMAG5170AHQDBVR trades ultra-low sleep power and embedded angle computation for higher bandwidth and range, while MLX90393ELW-ABA-000-RE offers greater resolution but significantly higher sleep current - making TMAG5273B1QDBVR optimal for long-life, I²C-based, angle-critical edge nodes.

Availability

TMAG5273B1QDBVR is available at Aetrix Electronics and suitable for smart lock actuation, e-bike motor control, drone gimbal stabilization, electricity meter tamper detection, and mobile robot navigation requiring stable component supply across automotive-grade temperature ranges and multi-year battery life.

Supply support for TMAG5273B1QDBVR 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, embedded processing, and high-reliability silicon solutions for industrial, automotive, and personal electronics markets.

The TMAG5273B1QDBVR belongs to TI's precision Hall-effect sensor product line, engineered specifically for ultra-low-power 3D magnetic position sensing in battery-operated IoT endpoints and motion-control subsystems.

FAQ

What is the factory-programmed I²C address for TMAG5273B1QDBVR?

The TMAG5273B1QDBVR has a fixed 7-bit factory I²C address of 0x22 (write address 0x44, read address 0x45). This address is pre-programmed and cannot be altered at power-up; however, the device supports user configuration of an alternate address via the I2C_ADDRESS register after initialization. Always verify address configuration before deploying multiple TMAG5273B1QDBVR units on the same I²C bus.

How does the TMAG5273B1QDBVR achieve ±0.5° angle accuracy?

The TMAG5273B1QDBVR achieves ±0.5° angle accuracy in the X-Y plane through on-chip CORDIC computation, 32× configurable averaging (reducing magnetic noise to 22 µT RMS), and factory-trimmed sensitivity mismatch (<±0.5% X-Y axis). This accuracy holds at 25°C with CONV_AVG=101b and applies only when using two orthogonal axes - the TMAG5273B1QDBVR specification sheet confirms this value for X-Y measurement under those exact conditions.

Can TMAG5273B1QDBVR operate from a 1.8 V supply?

Yes, TMAG5273B1QDBVR operates across 1.7 V to 3.6 V, including 1.8 V nominal supplies. At 1.8 V, it maintains full functionality: 5 nA sleep current, 20 kSPS conversion rate (single-axis), I²C Fast Mode (400 kHz), and accurate temperature sensing. The device's undervoltage lockout triggers at 1.39–1.6 V, ensuring reliable reset behavior during brownout conditions common in coin-cell applications.

What is the purpose of the TEST pin (Pin 3) on TMAG5273B1QDBVR?

The TEST pin (Pin 3) on TMAG5273B1QDBVR is a dedicated factory test terminal and must be connected to GND in all production designs. Leaving it floating or driving it high may cause unpredictable behavior, including failure to enter sleep mode or corrupted I²C communication. TI documentation explicitly states this pin has no user-accessible function and is not intended for system-level signal routing or debugging.

Does TMAG5273B1QDBVR support magnetic threshold interrupts on all three axes simultaneously?

Yes, TMAG5273B1QDBVR supports independent magnetic threshold configuration per axis (X, Y, Z) and temperature, with interrupt generation triggered by crossing any enabled threshold. The INT pin or SCL pin can assert an interrupt when one or more thresholds are exceeded - confirmed in Section 6.3.3 of the datasheet, which defines INT_MODE settings that respond to "magnetic or temperature threshold cross" without axis limitation.