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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

Analog Devices Inc./Maxim Integrated TMC4671-LA

Name: TMC4671-LA
Brand: Analog Devices Inc./Maxim Integrated
SKU: TMC4671-LA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TMC4671-LA

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Motor Drivers, Controllers

Package:: 76-VFQFN Exposed Pad

Datasheet:: TMC4671-LA.pdf

Description:: SERVO CONTROLLER IC, QFN76

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TMC4671-LA from TRINAMIC Motion Control is a fully integrated hardware-based servo controller IC implementing Field-Oriented Control (FOC) for 3-phase PMSM/BLDC, 2-phase stepper, and brushed DC motors. It delivers torque, velocity, and position control modes with 100 kHz current-loop update rate, integrated ΔΣ-ADCs for current sensing, and support for digital/analog encoder and Hall sensor interfaces - enabling high-precision motion control in compact industrial drives.

For engineers reviewing the TMC4671-LA datasheet, TMC4671-LA pinout, TMC4671-LA application, or TMC4671-LA equivalent, this page provides verified technical context on FOC hardware acceleration, real-time PWM engine configuration (20–100 kHz), SPI/UART debug interface operation, and motor feedback integration - critical for servo system architecture, closed-loop tuning, and embedded motion controller selection.

Technical Context

The TMC4671-LA implements all FOC computations-including Clarke/Park/iPark transforms, PI flux/torque/velocity controllers, and SVPWM generation-in dedicated hardware logic, eliminating CPU dependency for real-time current-loop execution. Its ADC engine supports internal and external ΔΣ modulators with programmable scaling and offset correction for precise I_U/I_V/I_W measurement.

Encoder processing includes digital ABN (≤5 MHz), analog Sin/Cos (0°/90° or 0°/120°/240°), and Hall interpolation with multi-turn 32-bit position counting. The PWM engine offers configurable frequency (20–100 kHz), BBM timing (0–2.5 µs), and auto-scaling during motion-ensuring deterministic timing and seamless commutation across motor types.

Key Specifications

Parameter	Value and Actual Design Meaning
Control Architecture	Hardware-accelerated FOC with dedicated PI controllers for flux, torque, velocity, and position - no firmware overhead for real-time current loop.
Current Loop Update Rate	Up to 100 kHz - enables high-bandwidth torque response and low-latency field alignment in PMSM/BLDC applications.
PWM Frequency Range	20 kHz to 100 kHz - adjustable via register; supports acoustic noise reduction and efficient switching in battery-powered systems.
Position Feedback Support	Digital ABN encoder (≤5 MHz), analog Sin/Cos, digital Hall (with 60°-step interpolation), and open-loop position generator - full sensor flexibility without external logic.
ADC Interface	Integrated ΔΣ-ADC frontend + external ΔΣ interface - supports shunt-based current sensing with programmable gain/offset for ±100 mV to ±1 V input ranges.
Communication Interfaces	SPI slave (1 MHz, 40-bit datagram), UART debug (up to 3 Mbps), Step/Direction, and TRINAMIC Real-Time Monitoring Interface - concurrent access without conflict.
Supply & IO Voltage	5 V and 3.3 V supplies; all digital I/Os at 3.3 V (VCCIO-selectable); analog inputs accept 5 V differential or 1.25 V single-ended - simplifies mixed-signal board design.

Pinout & Package

Package: QFN76 (10.5 mm × 6.5 mm, 0.4 mm pitch, exposed thermal pad).

Pin/Terminal	Circuit Role	Design Meaning
VCC_IO	Digital I/O supply	Configurable 3.3 V supply for all GPIOs; decoupling required for noise-sensitive SPI/UART operation.
REFP/REFN	ΔΣ modulator reference	Differential reference input for external ΔΣ ADCs; sets full-scale range for current sense voltage digitization.
ENC_A/ENC_B/ENC_N	Digital encoder interface	ABN quadrature inputs supporting ≤5 MHz edge rates; internal pull-ups enable direct connection to incremental encoders.
HALL_U/HALL_V/HALL_W	Digital Hall sensor inputs	Three-phase Hall interface with programmable polarity and interpolation for 60° electrical resolution per pole pair.
SDI/SDO/SCLK/CSN	SPI interface	Standard 4-wire SPI slave port; CSN active-low enables daisy-chaining multiple TMC4671-LA devices on shared bus.
TXD/RXD	UART debug interface	3.3 V logic-level UART (GND, TxD, RxD) supporting 9600–3 Mbaud; operates concurrently with SPI for real-time register monitoring.
PWM_UH/PWM_VH/PWM_WH	High-side gate driver outputs	Three complementary PWM outputs with programmable dead time; drive external half-bridge gate drivers directly.

Key Features

Feature	Design Value
Hardware FOC Engine	Full Field-Oriented Control pipeline implemented in ASIC logic - eliminates MCU interrupt latency and ensures deterministic 100 kHz current-loop timing.
Multi-Motor Support	Single IC controls 3-phase PMSM/BLDC, 2-phase stepper, or brushed DC motors - reduces BOM count and PCB footprint in multi-axis systems.
Encoder Initialization	On-chip algorithms for Hall-assisted, minimal-movement, and Bang-Bang encoder alignment - removes need for external calibration firmware.
Feed-Forward Compensation	Programmable friction and trajectory feed-forward inputs - improves tracking accuracy in high-dynamic-positioning applications like pick-and-place.
Real-Time Monitoring	TRINAMIC RTMI interface enables high-frequency streaming of internal variables (e.g., I_Q, I_D, position error) via single 10-pin connector - accelerates closed-loop tuning.

Applications

Robotics	Pick and Place Machines
Use Scenario: High-speed articulated robotic arms requiring smooth torque delivery and sub-millisecond position settling. IC Role / Device Role / Timing Role: Primary FOC servo controller executing real-time current-loop, velocity-loop, and position-loop - offloading motion control from host MCU. Use Value: Hardware-accelerated FOC enables 100 kHz torque updates and <1 µs jitter, reducing mechanical vibration and improving end-effector repeatability.	Use Scenario: Precision component placement in SMT lines with rapid acceleration/deceleration profiles. IC Role / Device Role / Timing Role: Integrated motion controller managing stepper motor microstepping and closed-loop correction using encoder feedback. Use Value: On-chip position interpolation and feed-forward compensation reduce following error by >40% vs. open-loop stepper drivers.
Factory Automation	E-Mobility Actuators
Use Scenario: Conveyor belt indexing, valve actuation, and linear stage control in ISO 13849-compliant machinery. IC Role / Device Role / Timing Role: Safety-aware servo controller providing watchdog supervision, configurable current limiting, and fault reporting via SPI status registers. Use Value: Integrated watchdog and clipping protection enable safe torque-limited operation without external safety circuitry.	Use Scenario: Power seat, mirror, and HVAC damper actuators in 12 V/24 V automotive systems. IC Role / Device Role / Timing Role: Compact FOC controller driving brushed DC or PMSM motors with integrated ADCs and 3.3 V/5 V dual-supply compatibility. Use Value: QFN76 package and 5 V tolerant analog inputs simplify integration into space-constrained automotive ECUs.

Robotics

Pick and Place Machines

Use Scenario: High-speed articulated robotic arms requiring smooth torque delivery and sub-millisecond position settling.

IC Role / Device Role / Timing Role: Primary FOC servo controller executing real-time current-loop, velocity-loop, and position-loop - offloading motion control from host MCU.

Use Value: Hardware-accelerated FOC enables 100 kHz torque updates and <1 µs jitter, reducing mechanical vibration and improving end-effector repeatability.

Use Scenario: Precision component placement in SMT lines with rapid acceleration/deceleration profiles.

IC Role / Device Role / Timing Role: Integrated motion controller managing stepper motor microstepping and closed-loop correction using encoder feedback.

Use Value: On-chip position interpolation and feed-forward compensation reduce following error by >40% vs. open-loop stepper drivers.

Factory Automation

E-Mobility Actuators

Use Scenario: Conveyor belt indexing, valve actuation, and linear stage control in ISO 13849-compliant machinery.

IC Role / Device Role / Timing Role: Safety-aware servo controller providing watchdog supervision, configurable current limiting, and fault reporting via SPI status registers.

Use Value: Integrated watchdog and clipping protection enable safe torque-limited operation without external safety circuitry.

Use Scenario: Power seat, mirror, and HVAC damper actuators in 12 V/24 V automotive systems.

IC Role / Device Role / Timing Role: Compact FOC controller driving brushed DC or PMSM motors with integrated ADCs and 3.3 V/5 V dual-supply compatibility.

Use Value: QFN76 package and 5 V tolerant analog inputs simplify integration into space-constrained automotive ECUs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar servo controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STSPIN32F0B	Integrated 32-bit ARM Cortex-M0+ MCU + gate drivers; FOC executed in firmware; max 60 kHz current loop.	Requires significant firmware development for tuning; lacks hardware encoder interpolation and RTMI streaming.	Choose when system needs MCU co-processing and cost sensitivity outweighs deterministic timing requirements.
MP6532	Dedicated FOC ASIC with 80 kHz current loop; no UART debug; limited encoder support (ABN only, no Hall/SinCos).	Lower feature set for basic PMSM control; no feed-forward or advanced initialization algorithms.	Choose for cost-optimized, single-motor PMSM drives where Hall or analog encoder use is unnecessary.

Compared with STSPIN32F0B and MP6532, the TMC4671-LA delivers superior real-time determinism (100 kHz hardware loop), broader feedback compatibility (Hall + SinCos + ABN), and production-ready tuning tools via RTMI - making it optimal for high-performance, multi-sensor servo systems where development time and motion fidelity are critical.

Availability

TMC4671-LA is available at Aetrix Electronics and suitable for robotics, factory automation, and e-mobility applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial-grade motion control designs.

Supply support for TMC4671-LA 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

TRINAMIC Motion Control GmbH & Co. KG is a German semiconductor company specializing in high-precision motion control ICs and modules, with expertise in stepper, BLDC, and servo drive technologies since 1997.

The TMC4671-LA belongs to TRINAMIC's hardware FOC servo controller product line, designed to replace software-based motor control with deterministic, low-latency silicon solutions for industrial automation, medical devices, and autonomous mobile platforms.

FAQ

What motor types does the TMC4671-LA support?

The TMC4671-LA supports 3-phase PMSM/BLDC motors (FOC3 mode), 2-phase stepper motors (FOC2 mode), and brushed DC or voice coil motors (DC1 mode). Each mode uses dedicated hardware paths for current sensing, coordinate transformation, and PWM generation - enabling seamless reconfiguration via register writes without firmware changes. Motor type selection is configured at startup through the MODE register.

Does the TMC4671-LA require an external microcontroller to operate?

No - the TMC4671-LA is a standalone servo controller IC that executes full FOC, velocity, and position loops in hardware. While it interfaces with a host MCU via SPI or UART for command and configuration, all real-time control (including 100 kHz current-loop execution) runs autonomously. The TMC4671-LA can even run open-loop motion profiles using its internal position generator without any host communication.

What encoder interfaces are supported by the TMC4671-LA?

The TMC4671-LA supports digital ABN encoders (≤5 MHz), analog Sin/Cos encoders (0°/90° or 0°/120°/240°), digital Hall sensors (H1/H2/H3) with 60° interpolation, and open-loop position generation. All interfaces are processed on-chip with automatic phase alignment, multi-turn counting (32-bit), and velocity estimation - eliminating need for external FPGA or MCU-based decoding logic.

How does the TMC4671-LA handle current sensing?

The TMC4671-LA integrates a ΔΣ-ADC frontend supporting both internal shunt-amplifier inputs and external ΔΣ modulators (e.g., AD7403). It provides programmable gain, offset correction, and scaling to convert raw ADC values into physical current units (e.g., mA). The ADC engine feeds calibrated I_U/I_V/I_W directly into the FOC engine - ensuring accurate torque vector calculation without host intervention.

Is the TMC4671-LA pin-compatible with other TRINAMIC controllers like the TMC4361A?

No - the TMC4671-LA uses a unique QFN76 pinout optimized for its integrated ADC, encoder, and PWM interfaces. It is not pin-compatible with TMC4361A (QFN40) or TMC4672 (QFN64). Migration requires PCB layout revision, though register-level compatibility exists for many FOC parameters, easing firmware adaptation across TRINAMIC's hardware FOC family.

TMC4671-LA Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 76-VFQFN Exposed Pad

Packaging:: Tray

Product Status:: Active

Motor Type - Stepper:: Multiphase

Motor Type - AC, DC:: Brushless DC (BLDC), PMSM, DC

Function:: Controller - Commutation, Direction Management

Output Configuration:: Pre-Driver - High Side/Low Side

Interface:: SPI, Step/Direction

Technology:: Power MOSFET

Step Resolution:: -

Applications:: Servo

Current - Output:: 4mA

Voltage - Supply:: 3.15V ~ 3.45V

Voltage - Load:: -

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 76-QFN (10.5x6.5)

TMC4671-LA FAQ

1.How can I place an order for TMC4671-LA through Aetrix?

Please submit a Request for Quotation (RFQ) for TMC4671-LA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TMC4671-LA reliable?

The price and inventory of TMC4671-LA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMC4671-LA is usually 5 days.

3.What payment methods are accepted for TMC4671-LA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMC4671-LA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TMC4671-LA?

TMC4671-LA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TMC4671-LA order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TMC4671-LA?

For technical support, including TMC4671-LA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMC4671-LA requirements.

6.How does Aetrix verify that TMC4671-LA is sourced from the original manufacturer or authorized distributors?

All TMC4671-LA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMC4671-LA meets industry standards.

7.What is the process for return or replacement of TMC4671-LA?

All TMC4671-LA units undergo pre-shipment inspection (PSI). If there is an issue with TMC4671-LA, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TMC4671-LA part is unused and in its original packaging.

Return procedure for TMC4671-LA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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