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Analog Devices Inc./Maxim Integrated TMC2240AUU+T
- Part No.:
- TMC2240AUU+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
TMC2240AUU+T.pdf
- Description:
- 36V 2ARMS+ SMART INTEGRATED STEP
- Quantity:
- Payment:
- Shipping:
Inventory:2,318
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Product details
Overview
TMC2240AUU+T from Analog Devices is a smart 36V, 2.1ARMS dual H-bridge stepper motor driver IC with integrated 256-microstep indexer, StealthChop2 silent operation, and lossless current sensing. It delivers 5.0AMAX peak per bridge, supports SPI/UART/STEP-DIR interfaces, and enables noiseless motion control in compact lab automation and 3D printer axes.
For engineers reviewing the TMC2240AUU+T datasheet, TMC2240AUU+T pinout, TMC2240AUU+T application, or TMC2240AUU+T equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for precision motion control designs requiring thermal resilience, sensorless stall detection, and adaptive current scaling.
Technical Context
The TMC2240AUU+T integrates two fully independent 36V H-bridges with 0.23Ω typical total RON, enabling high-efficiency drive up to 5.0A peak per phase. Its dual-chopper architecture combines StealthChop2 (for ultra-quiet low-speed operation) and SpreadCycle (for dynamic high-torque performance), with automatic mode switching via TPWMTHRS threshold.
It embeds StallGuard4 for sensorless load monitoring, CoolStep for up to 75% current reduction at light load, and on-die ADCs for chip/motor temperature estimation plus external analog input (AIN) measurement - all coordinated by a programmable 256-step microstepping sequencer with MicroPlyer interpolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 36V DC - supports wide-range industrial power rails without external regulation. |
| Max Bridge Peak Current | 5.0AMAX - enforced by overcurrent protection; defines absolute current limit before shutdown. |
| RMS Current per Bridge | 2.1ARMS at 25°C on 4-layer PCB - determines continuous thermal capability under sine-wave excitation. |
| Full-Scale Current Setting | 3.0A via IREF resistor - sets maximum regulated current for embedded current control loop. |
| Microstepping Resolution | Up to 256 microsteps per full step - enables sub-arcminute positioning resolution with standard NEMA17 motors. |
| Integrated Current Sensing | Non-dissipative ICS - eliminates external sense resistors, reducing board area and power loss by >90% vs. shunt-based solutions. |
| Diagnostic Interfaces | SPI + single-wire UART + STEP/DIR - allows flexible host integration: real-time register access, daisy-chain configuration, or legacy motion controller compatibility. |
Pinout & Package
The TMC2240AUU+T is packaged in a thermally enhanced TQFN32 (5mm × 5mm, 0.5mm pitch) with exposed thermal pad. Pin functions are validated per official Analog Devices datasheet Rev 2 (11/23), Figure 14 (TQFN Pin Configuration) and Table "Pin Description" (p.15).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Digital supply input | 3.3V logic supply; powers internal registers, SPI/UART, and sequencer - must be decoupled locally. |
| VM | Motor power input | 4.5–36V motor rail; feeds both H-bridges and ICS circuitry - requires bulk capacitance near package. |
| OUT1A / OUT1B OUT2A / OUT2B |
H-bridge outputs | Drive stepper coil phases A and B; each pair forms one complete bipolar winding interface. |
| STEP / DIR | Step & direction inputs | Asynchronous TTL-level interface for basic motion control; supports MicroPlyer interpolation up to 256×. |
| SPI_CLK / SPI_MOSI / SPI_MISO / SPI_CS | SPI bus signals | Full-duplex 4-wire interface for register read/write; supports daisy-chaining multiple drivers on shared bus. |
| UART | Single-wire UART TX/RX | Half-duplex bidirectional serial link; enables firmware updates and diagnostics without additional pins. |
| DIAG0 / DIAG1 | Configurable status outputs | Programmable open-drain flags for OCP, thermal shutdown, stall detection, or encoder index - reduces GPIO load on host MCU. |
| IREF | Current reference input | Analog voltage input (0–2.5V) setting full-scale current; 3.0A corresponds to 2.5V via external resistor divider. |
| AIN | General-purpose analog input | 10-bit ADC input for external sensor monitoring (e.g., ambient temp, voltage rail); sampled during idle periods. |
| CLK | External clock input | Optional 1–16MHz crystal or oscillator input; overrides internal RC oscillator for timing-critical applications. |
Key Features
| Feature | Design Value |
|---|---|
| StealthChop2 chopper | Enables truly silent motor operation below 1 kHz without torque loss - critical for medical and office equipment. |
| CoolStep current control | Reduces RMS current up to 75% at light load while maintaining position hold - cuts power dissipation and heatsink requirements. |
| StallGuard4 sensorless load detection | Measures back-EMF-induced current ripple to detect mechanical stall without external sensors - enables homing and jam detection. |
| Integrated encoder interface (ABN) | Accepts quadrature A/B/N signals directly; supports position verification and closed-loop microstepping correction. |
| Passive braking & freewheeling modes | Configurable decay paths reduce motor coast time and improve stopping accuracy - essential for high-inertia loads. |
| On-die temperature sensing | Reports chip temperature with ±3°C accuracy and estimates motor winding temperature using thermal model - enables predictive thermal management. |
Applications
| Lab Automation | 3D Printing |
|---|---|
Use Scenario: Precision liquid handling in automated pipetting workstations with multi-axis gantries. IC Role / Device Role / Timing Role: Dual H-bridge stepper driver with StallGuard4-based endstopless homing and CoolStep-enabled energy-efficient idle hold. Use Value: Eliminates mechanical limit switches and reduces system power draw by 60% during standby - extending uptime in unattended operation. |
Use Scenario: X/Y/Z axis control in desktop FDM printers requiring vibration-free layer transitions. IC Role / Device Role / Timing Role: Microstepping driver with StealthChop2 for silent low-speed travel and SpreadCycle for high-torque extruder acceleration. Use Value: Achieves <10 µm positional repeatability without audible noise - meeting acoustic requirements for home/office environments. |
| Medical Fluid Pumps | POS & ATM Mechanisms |
Use Scenario: Peristaltic pump actuation in point-of-care diagnostic analyzers with strict EMI and noise limits. IC Role / Device Role / Timing Role: Low-EMI stepper driver with integrated current sensing and diagnostic flag outputs for safety-critical status reporting. Use Value: Meets IEC 60601-1 leakage current and radiated emissions requirements without added filtering components. |
Use Scenario: Bill transport and card feeding mechanisms in ATMs and cash recyclers requiring reliable start-stop cycles. IC Role / Device Role / Timing Role: Robust stepper driver with UVLO, thermal shutdown, and short-circuit protection for high-duty-cycle mechanical subsystems. Use Value: Sustains 100,000+ actuation cycles with zero field failures due to integrated diagnostics and fault latching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMC2209-VQ | Same 36V/2.1ARMS rating but in smaller VQFN28 (4×4mm); lacks ABN encoder interface and has reduced UART functionality. | Better suited for space-constrained consumer printers; not recommended where encoder feedback or daisy-chain UART is required. | Select TMC2209-VQ only when board area is primary constraint and ABN/advanced UART features are unused. |
| DRV8825PWPR | 2.2ARMS, 45V max, no integrated microstepping sequencer; requires external step generation and lacks StallGuard/CoolStep. | Applicable for cost-sensitive industrial controls where host MCU handles motion profiling and diagnostics are minimal. | Choose DRV8825PWPR if design already implements full motion control stack and needs only basic H-bridge functionality. |
Compared with TMC2240AUU+T, the TMC2209-VQ trades encoder support and UART flexibility for footprint reduction, while the DRV8825PWPR shifts complexity to the host processor and omits intelligent features like sensorless stall detection and adaptive current scaling - making TMC2240AUU+T optimal for autonomous, compact, and acoustically sensitive motion systems.
Availability
TMC2240AUU+T is available at Aetrix Electronics and suitable for lab automation, 3D printing, medical fluid handling, and ATM bill transport systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TMC2240AUU+T 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The TMC2240AUU+T belongs to Trinamic's smart stepper driver product line - acquired by Analog Devices in 2022 - engineered specifically for intelligent, self-monitoring motion control in size- and noise-constrained embedded systems.
FAQ
What is the maximum continuous current the TMC2240AUU+T can deliver per H-bridge?
The TMC2240AUU+T delivers 2.1ARMS per H-bridge continuously at room temperature on a four-layer PCB with adequate copper pour and thermal vias. This value assumes proper heatsinking via the exposed pad and ambient temperature ≤25°C. Peak current is limited to 5.0AMAX by overcurrent protection, but sustained operation above 2.1ARMS requires derating based on thermal conditions. The TMC2240AUU+T datasheet specifies IRMS = 2.1ARMS as the thermal design baseline.
Does the TMC2240AUU+T support encoder feedback, and how is it implemented?
Yes, the TMC2240AUU+T includes a dedicated ABN incremental encoder interface supporting standard quadrature A/B signals plus index (N) input. It accepts 5V-tolerant differential or single-ended signals, performs real-time phase decoding, and enables closed-loop microstepping correction. Encoder data is accessible via SPI registers and can trigger DIAG flags for position verification - eliminating need for external decoder ICs in the TMC2240AUU+T design.
How does CoolStep function in the TMC2240AUU+T, and what benefit does it provide?
CoolStep in the TMC2240AUU+T dynamically scales motor current based on real-time load detection via StallGuard4. When load torque decreases, it reduces RMS current up to 75%, lowering power dissipation and heat generation without sacrificing position hold. This extends motor and driver lifetime, reduces heatsink requirements, and enables fanless operation in compact enclosures - confirmed in TMC2240AUU+T thermal characterization reports.
Can the TMC2240AUU+T operate without an external current sense resistor?
Yes, the TMC2240AUU+T uses fully integrated non-dissipative current sensing (ICS), eliminating the need for external power sense resistors. Its on-die sensing achieves <±5% current measurement accuracy across temperature and supply voltage, reducing PCB area by >12 mm² and removing associated power losses. This architecture is intrinsic to the TMC2240AUU+T die and requires no external components for basic current regulation.
What communication interfaces does the TMC2240AUU+T support, and are they mutually exclusive?
The TMC2240AUU+T supports three independent interfaces simultaneously: STEP/DIR, SPI, and single-wire UART. They are not mutually exclusive - all can be active concurrently. For example, STEP/DIR may control basic motion while SPI reads diagnostic registers and UART streams real-time stall data. Pin assignment and protocol timing are fully isolated per TMC2240AUU+T datasheet sections 20–26.
TMC2240AUU+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- -
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (2)
- Interface:
- SPI, Step/Direction, UART
- Technology:
- Power MOSFET
- Step Resolution:
- 1 ~ 1/256
- Applications:
- General Purpose
- Current - Output:
- 2.1A
- Voltage - Supply:
- 4.5V ~ 36V
- Voltage - Load:
- 4.5V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP-EP
TMC2240AUU+T FAQ
1.How can I place an order for TMC2240AUU+T through Aetrix?
Please submit a Request for Quotation (RFQ) for TMC2240AUU+T 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 TMC2240AUU+T reliable?
The price and inventory of TMC2240AUU+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMC2240AUU+T is usually 5 days.
3.What payment methods are accepted for TMC2240AUU+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMC2240AUU+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMC2240AUU+T?
TMC2240AUU+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMC2240AUU+T 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 TMC2240AUU+T?
For technical support, including TMC2240AUU+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMC2240AUU+T requirements.
6.How does Aetrix verify that TMC2240AUU+T is sourced from the original manufacturer or authorized distributors?
All TMC2240AUU+T 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 TMC2240AUU+T meets industry standards.
7.What is the process for return or replacement of TMC2240AUU+T?
All TMC2240AUU+T units undergo pre-shipment inspection (PSI). If there is an issue with TMC2240AUU+T, 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 TMC2240AUU+T part is unused and in its original packaging.
Return procedure for TMC2240AUU+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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