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Analog Devices Inc./Maxim Integrated TMC2240ATJ+T
- Part No.:
- TMC2240ATJ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
TMC2240ATJ+T.pdf
- Description:
- 36V 2ARMS+ SMART INTEGRATED STEP
- Quantity:
- Payment:
- Shipping:
Inventory:2,225
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Product details
Overview
TMC2240ATJ+T from Analog Devices is a smart integrated stepper motor driver IC featuring dual 36V, 3.0AMAX H-bridges, 256 microsteps, StealthChop2 silent operation, and non-dissipative integrated current sensing (ICS). It delivers 2.1ARMS per bridge on a four-layer PCB and supports SPI/UART/S/D interfaces for motion control in compact industrial automation systems.
For engineers reviewing the TMC2240ATJ+T datasheet, TMC2240ATJ+T pinout, TMC2240ATJ+T application, or TMC2240ATJ+T equivalent, this page provides verified technical context, real-world design meanings of key specs, validated alternative options, and precise package & pinout details - all aligned to the TQFN32 5mm × 5mm variant.
Technical Context
The TMC2240ATJ+T implements a dual-H-bridge topology with independent current regulation per phase, using ADI-Trinamic's proprietary StealthChop2 chopper for ultra-low acoustic noise and SpreadCycle for high-dynamic torque response. Its embedded indexer supports microstep interpolation up to 256× via MicroPlyer.
It integrates StallGuard2/4 for sensorless load detection, CoolStep for adaptive current reduction up to 75%, and diagnostics including chip/motor temperature estimation, open-load detection, and overvoltage/overcurrent/thermal shutdown flags. All functions are configurable via SPI or single-wire UART.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 36V DC - enables direct integration into 12V/24V industrial power rails without external regulators. |
| H-Bridge RON (HS+LS) | 0.23Ω typical at 25°C - minimizes conduction loss and thermal rise during continuous 2.1ARMS operation. |
| Max RMS Current / Bridge | 2.1ARMS - sustained output capability on standard four-layer PCB, defining thermal design margin. |
| Full-Scale Current Setting | 3.0A - set externally via IREF resistor; defines upper limit of embedded current regulation loop. |
| Microstep Resolution | Up to 256 microsteps per full step - enables smooth, high-precision positioning without external microstepping logic. |
| Integrated Current Sensing | Non-dissipative ICS - eliminates external sense resistors, saving >30 mm² board area and reducing power loss by ~1.5W vs. shunt-based designs. |
| Diagnostic Interfaces | SPI + single-wire UART + STEP/DIR - allows flexible host integration: SPI for configuration, UART for daisy-chained multi-driver systems, S/D for legacy controller compatibility. |
Pinout & Package
The TMC2240ATJ+T is packaged in a thermally enhanced TQFN32 (5mm × 5mm, 0.5mm pitch) with exposed thermal pad, optimized for compact motor drive modules requiring efficient heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Digital supply input | 3.3V logic supply; powers internal registers, SPI/UART, and indexer - must be decoupled with ≥1µF ceramic capacitor. |
| VM | Motor power input | 4.5–36V motor rail; connects directly to H-bridge high-side FETs - requires low-ESR bulk capacitance ≥100µF near package. |
| OUT1A / OUT1B / OUT2A / OUT2B | H-bridge motor outputs | Drive bipolar stepper coil phases A and B; each pair handles up to 5.0A peak with active current regulation. |
| IREF | Current reference input | Analog voltage input (0–2.5V) setting full-scale current (IFS = 3.0A max); resistor divider defines precise motor current limit. |
| STEP / DIR | Step-and-direction interface | Asynchronous digital inputs accepting 3.3V/5V logic; STEP edge triggers microstep advance; DIR sets rotation direction. |
| SPI_CS / SCK / MOSI / MISO | SPI interface signals | Standard 4-wire SPI for register read/write; supports up to 10 MHz clock; MISO enables daisy-chain feedback. |
| UART | Single-wire UART I/O | Half-duplex bidirectional serial interface; supports addressable multi-node networks without additional control lines. |
| DIAG0 / DIAG1 | Configurable diagnostic outputs | Open-drain flags indicating stall, overtemperature, OCP, UVLO, or custom status - programmable per application need. |
Key Features
| Feature | Design Value |
|---|---|
| StealthChop2 chopper | Enables truly silent motor operation below 20 kHz while maintaining >92% efficiency and full torque at low speeds. |
| CoolStep current scaling | Reduces motor current by up to 75% during light-load conditions, cutting power dissipation and enabling smaller heatsinks. |
| StallGuard4 sensorless load detection | Provides calibrated torque measurement (0–1023 range) across full speed range - eliminates need for external position sensors in homing or jam detection. |
| MicroPlyer step interpolation | Converts coarse STEP pulses (e.g., 16×) into smooth 256× microsteps internally - simplifies host controller firmware and reduces timing jitter sensitivity. |
| Integrated analog monitor (AIN) | Measures one external analog signal (0–3.3V) with 10-bit resolution - enables real-time monitoring of auxiliary sensors (e.g., temperature, pressure) without extra ADC. |
| Thermal & motor temperature estimation | On-chip sensor + algorithm estimates die temperature and extrapolates motor winding temperature - supports predictive thermal derating and safe torque limits. |
Applications
| 3D Printers | Lab Automation |
|---|---|
Use Scenario: Precise layer deposition and gantry positioning in fused deposition modeling (FDM) printers. IC Role / Device Role / Timing Role: Dual-phase stepper driver with microstep interpolation and stall detection for closed-loop-like positioning without encoders. Use Value: 256 microsteps + StealthChop2 eliminate print artifacts from vibration/noise; CoolStep reduces idle power by 60%, lowering chamber ambient temperature drift. |
Use Scenario: High-reliability pipetting, slide staining, and reagent dispensing in automated lab workstations. IC Role / Device Role / Timing Role: Smart driver with StallGuard4 and diagnostic flags enabling autonomous error recovery (e.g., clog detection, tip collision). Use Value: StallGuard4 quantifies load torque in real time - detects blocked syringe needles at <100mN·m, triggering immediate stop before mechanical damage. |
| POS Terminals | CCTV Pan-Tilt Mechanisms |
Use Scenario: Paper feed, receipt cutting, and cash drawer actuation in point-of-sale terminals. IC Role / Device Role / Timing Role: Compact stepper driver supporting S/D interface for legacy MCU control and UART for remote firmware updates. Use Value: TQFN32 5mm × 5mm footprint fits tight space constraints; integrated diagnostics reduce field service calls by flagging open-load faults in paper path sensors. |
Use Scenario: Smooth, jitter-free pan/tilt movement in outdoor security cameras under variable wind loads. IC Role / Device Role / Timing Role: Dual-H-bridge driver with SpreadCycle for dynamic torque response and passive braking for precise stopping inertia compensation. Use Value: SpreadCycle ensures consistent torque across 0.1–300 RPM; passive braking eliminates overshoot during rapid directional reversal, improving tracking accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMC2209-VQ | Single H-bridge, 2.0ARMS, no UART, smaller TQFN28 package | Limited to lower-current motors; lacks daisy-chain capability and motor temperature estimation | Select when board space is critical and only one motor axis is needed with basic S/D control. |
| DRV8825PWPR | 2.2ARMS, external sense resistors, no integrated indexer or StallGuard, 256× microstepping supported | Requires external current sense resistors and microstepping logic; no sensorless stall detection or CoolStep | Choose for cost-sensitive designs where diagnostic depth and energy savings are secondary to BOM simplicity. |
Compared with TMC2240ATJ+T, the TMC2209-VQ offers reduced integration and channel count but saves ~30% PCB area, while the DRV8825PWPR relies on external components for current sensing and lacks embedded intelligence - making TMC2240ATJ+T optimal for compact, self-diagnosing multi-axis systems demanding silent, adaptive motion.
Availability
TMC2240ATJ+T is available at Aetrix Electronics and suitable for 3D printers, lab automation equipment, POS terminals, and CCTV pan-tilt mechanisms requiring stable component supply, long-term lifecycle support, and production-ready stepper drive performance.
Supply support for TMC2240ATJ+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 technologies, serving industrial, automotive, communications, and healthcare markets.
The TMC2240ATJ+T belongs to ADI's Trinamic smart motor control product line, engineered for intelligent, compact, and energy-efficient motion systems - especially where silent operation, sensorless diagnostics, and minimal external components are critical.
FAQ
What is the maximum motor current the TMC2240ATJ+T can deliver per bridge?
The TMC2240ATJ+T supports a maximum peak current of 5.0A per H-bridge, limited by its Overcurrent Protection (OCP) circuit. Its rated RMS current is 2.1A per bridge under standard thermal conditions (four-layer PCB, 25°C ambient). The full-scale current setting is adjustable up to 3.0A via the IREF pin, defining the upper bound of the embedded current regulation loop used by StealthChop2 and SpreadCycle. This ensures reliable operation without exceeding thermal or electrical limits in continuous duty.
Does the TMC2240ATJ+T require external current sense resistors?
No, the TMC2240ATJ+T features fully integrated, non-dissipative current sensing (ICS) that eliminates the need for external power sense resistors. This built-in ICS measures phase current directly through the H-bridge FETs, reducing board area by >30 mm² and removing up to 1.5W of resistive power loss compared to shunt-based solutions. The architecture maintains ±5% current regulation accuracy across temperature and supply variations, enabling precise torque control without calibration overhead.
How does StealthChop2 in the TMC2240ATJ+T achieve silent motor operation?
StealthChop2 in the TMC2240ATJ+T uses adaptive PWM frequency modulation and optimized blank time control to suppress audible switching noise below 20 kHz - eliminating the characteristic whine of conventional stepper drivers. It dynamically adjusts chopper parameters based on motor back-EMF and load, maintaining high torque and >92% efficiency even at standstill and low speeds. Unlike fixed-frequency choppers, StealthChop2 avoids resonance excitation, resulting in vibration-free motion essential for medical devices and precision optics.
Can the TMC2240ATJ+T operate without an external microcontroller?
Yes - the TMC2240ATJ+T includes a built-in indexer and supports standalone operation via its STEP/DIR interface. When configured in S/D mode, it autonomously executes microstep sequencing (up to 256×), current regulation, and diagnostics without host intervention. Optional features like CoolStep, StallGuard4, and StealthChop2 tuning can be pre-configured via SPI or UART during initialization, enabling "set-and-forget" deployment in resource-constrained systems such as embedded actuators or battery-powered devices.
What package type is used for the TMC2240ATJ+T?
The TMC2240ATJ+T uses the TQFN32 (5mm × 5mm, 0.5mm pitch) package with an exposed thermal pad, as indicated by the "TJ" suffix in the part number. This thermally optimized QFN variant enables efficient heat transfer to the PCB ground plane, supporting continuous 2.1ARMS operation without forced air cooling. It is distinct from the TSSOP38 variant (marked "TJH") and is pin-compatible with other TQFN32-based Trinamic drivers for layout reuse.
TMC2240ATJ+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN 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 (4)
- 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:
- 32-TQFN (5x5)
TMC2240ATJ+T FAQ
1.How can I place an order for TMC2240ATJ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for TMC2240ATJ+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 TMC2240ATJ+T reliable?
The price and inventory of TMC2240ATJ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMC2240ATJ+T is usually 5 days.
3.What payment methods are accepted for TMC2240ATJ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMC2240ATJ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMC2240ATJ+T?
TMC2240ATJ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMC2240ATJ+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 TMC2240ATJ+T?
For technical support, including TMC2240ATJ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMC2240ATJ+T requirements.
6.How does Aetrix verify that TMC2240ATJ+T is sourced from the original manufacturer or authorized distributors?
All TMC2240ATJ+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 TMC2240ATJ+T meets industry standards.
7.What is the process for return or replacement of TMC2240ATJ+T?
All TMC2240ATJ+T units undergo pre-shipment inspection (PSI). If there is an issue with TMC2240ATJ+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 TMC2240ATJ+T part is unused and in its original packaging.
Return procedure for TMC2240ATJ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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