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Analog Devices Inc./Maxim Integrated TMC2240AUU+
- Part No.:
- TMC2240AUU+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
TMC2240AUU+.pdf
- Description:
- 36V 2ARMS+ SMART INTEGRATED STEP
- Quantity:
- Payment:
- Shipping:
Inventory:2,509
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Product details
Overview
TMC2240AUU+ from Analog Devices is a smart 36V, 2.1ARMS stepper motor driver IC with integrated dual H-bridges, StealthChop2 silent operation, and SPI/UART serial interfaces. It delivers up to 5.0A peak per bridge, supports 256 microsteps, and features non-dissipative current sensing for compact, thermally efficient motion control in space-constrained industrial actuators.
For engineers reviewing the TMC2240AUU+ datasheet, TMC2240AUU+ pinout, TMC2240AUU+ application, or TMC2240AUU+ equivalent, key selection criteria include RMS current capability (2.1ARMS), integrated indexer, lossless current sensing, thermal monitoring, and dual chopper modes (StealthChop2 + SpreadCycle) for noise-sensitive precision positioning systems.
Technical Context
The TMC2240AUU+ integrates two fully independent 36V H-bridges with typical RON = 0.23Ω (HS+LS), enabling high-efficiency drive at up to 5.0A peak per phase. Its embedded 256-step microstepping sequencer and MicroPlyer interpolation support smooth low-velocity motion without external controllers.
It implements dual chopper architectures: StealthChop2 for ultra-quiet operation below threshold velocity, and SpreadCycle for high-dynamic torque delivery above TPWMTHRS - with automatic mode switching and jerk-free transition. StallGuard4 and CoolStep provide sensorless load detection and adaptive current scaling down to 25% of full scale.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 36V DC - supports wide-input industrial power rails including 12V/24V systems without external regulators. |
| RMS Current per Bridge | 2.1ARMS at 25°C on 4-layer PCB - defines continuous thermal limit for sustained torque output. |
| Peak Current per Bridge | 5.0AMAX - enforced by overcurrent protection; enables short-term acceleration bursts. |
| Full-Scale Current Setting | 3.0A - set via external IREF resistor; determines maximum regulated current in drive regulation loop. |
| Microstep Resolution | Up to 256 microsteps per full step - achieved via internal sequencer and MicroPlyer interpolation for sub-step smoothness. |
| Total RON (HS+LS) | 0.23Ω typical - minimizes conduction loss and board-level heating in compact layouts. |
| Integrated Current Sensing | Non-dissipative ICS - eliminates external sense resistors, saving >70% PCB area and eliminating associated power loss. |
Pinout & Package
The TMC2240AUU+ is packaged in a thermally enhanced TQFN32 (5mm × 5mm, 0.5mm pitch) with exposed thermal pad. Pin assignment matches the TQFN variant per Analog Devices' official datasheet Figure 14 (TMC2240 TQFN Pin Configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | Digital I/O supply | 3.3V logic supply for SPI/UART/STEP/DIR interfaces; decoupling required near pin. |
| VM | Motor power input | 4.5–36V high-current path feeding both H-bridges; requires low-impedance layout and bulk capacitance. |
| OUT1A / OUT1B / OUT2A / OUT2B | H-bridge outputs | Direct connections to stepper motor phases A and B; each pair drives one winding with PWM-controlled current. |
| IREF | Current reference input | Analog voltage setting full-scale current (IFS = 3.0A); resistor divider from VDDIO sets precise IFS value. |
| SPI_CLK / SPI_MOSI / SPI_MISO / SPI_CS | SPI interface signals | Standard 4-wire SPI for register read/write, diagnostics, and real-time parameter tuning. |
| UART_TXD | Single-wire UART transmit | Asynchronous serial communication using open-drain TX line; supports daisy-chained multi-node configurations. |
| STEP / DIR | Step-and-direction interface | Legacy-compatible stepping control with hardware interpolation (MicroPlyer) enabling 16→256 microstep upscaling. |
| DIAG0 / DIAG1 | Configurable diagnostic flags | Programmable outputs indicating stall, overtemperature, OCP, UVLO, or open-load conditions per user-defined mapping. |
Key Features
| Feature | Design Value |
|---|---|
| StealthChop2 chopper | Enables truly silent motor operation below 1000 steps/sec while maintaining >92% efficiency and full torque. |
| CoolStep current adaptation | Reduces motor current dynamically based on load - cutting power dissipation by up to 75% during light-load holding. |
| StallGuard4 sensorless load detection | Measures back-EMF-induced current ripple to detect mechanical stall or end-of-travel without physical sensors. |
| Integrated ABN encoder interface | Accepts standard quadrature encoder signals (A/B/N) for closed-loop position verification or homing routines. |
| On-chip temperature monitoring | Provides calibrated ADC readings for both die temperature and estimated motor winding temperature. |
| Passive braking & freewheeling modes | Configurable decay paths allow rapid deceleration (braking) or energy recovery (freewheeling) during direction reversal. |
Applications
| 3D Printers & ID Card Printers | Lab Automation & Liquid Handling |
|---|---|
Use Scenario: Precise layer deposition and printhead positioning in fused deposition modeling (FDM) printers and high-resolution card encoding systems. IC Role / Device Role / Timing Role: Primary stepper driver controlling X/Y/Z axes and paper feed mechanisms with microsecond-level STEP timing accuracy. Use Value: StealthChop2 eliminates audible coil whine during slow raster moves, while CoolStep reduces heat buildup during long idle periods between layers. |
Use Scenario: Syringe pump actuation and robotic pipetting in automated clinical analyzers and PCR workstations. IC Role / Device Role / Timing Role: Closed-loop-capable driver interfacing with ABN encoders to verify dispense volume and prevent missed steps under variable fluid viscosity. Use Value: StallGuard4 detects occlusion or dry-run conditions in real time; integrated diagnostics enable predictive maintenance alerts. |
| Office Automation & Paper Handling | CCTV Pan-Tilt Mechanisms |
Use Scenario: Document feeding, stapling, and finishing in multifunction printers and high-speed copiers. IC Role / Device Role / Timing Role: Dual-bridge driver powering main transport and finisher motors with synchronized STEP/DIR commands and thermal derating. Use Value: 2.1ARMS rating ensures reliable torque at elevated ambient temperatures inside enclosed printer chassis; UVLO prevents erratic behavior during brownout events. |
Use Scenario: Smooth, jitter-free pan/tilt movement in outdoor security cameras requiring silent operation and positional repeatability. IC Role / Device Role / Timing Role: High-resolution microstepping driver with SpreadCycle for dynamic torque during fast slewing and StealthChop2 for quiet surveillance mode. Use Value: Jerk-free chopper mode switching eliminates image shake during velocity transitions; thermal shutdown protects against solar-heated enclosures. |
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 | Lower voltage (2.5–16V), single H-bridge, no ABN interface, smaller TQFN28 package. | Limited to low-voltage, single-axis consumer-grade printers; lacks StallGuard4 and CoolStep calibration depth. | Select when cost and board area are critical, and 36V operation or dual-axis synchronization is unnecessary. |
| DRV8825PWPR | 2.5–16V supply, external sense resistors, no integrated UART/SPI, fixed 32-step max resolution. | Requires external current-sense amplifiers and microcontroller-based chopper tuning; higher BOM count and layout complexity. | Choose only if legacy design reuse or TI ecosystem compatibility outweighs noise, efficiency, and integration advantages of TMC2240AUU+. |
Compared with TMC2209-VQ and DRV8825PWPR, the TMC2240AUU+ provides wider voltage range, dual independent bridges, sensorless load detection with StallGuard4, and seamless chopper mode switching - delivering superior acoustic performance, thermal resilience, and system-level integration for industrial motion control.
Availability
TMC2240AUU+ is available at Aetrix Electronics and suitable for 3D printing, lab automation, and office equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TMC2240AUU+ 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, headquartered in Wilmington, MA.
The TMC2240AUU+ belongs to Trinamic's smart stepper driver product line - acquired by Analog Devices in 2022 - engineered specifically for intelligent, sensorless, and acoustically optimized motion control in industrial and medical equipment.
FAQ
What is the maximum continuous current the TMC2240AUU+ can deliver per H-bridge?
The TMC2240AUU+ delivers up to 2.1ARMS per H-bridge at room temperature on a four-layer PCB with adequate copper pour and thermal vias. This RMS rating reflects sustainable thermal performance under continuous operation; peak current is limited to 5.0AMAX by internal overcurrent protection. Derating is required above 25°C ambient or with reduced PCB copper area.
Does the TMC2240AUU+ support both SPI and UART communication simultaneously?
No - the TMC2240AUU+ supports SPI and single-wire UART as separate, mutually exclusive communication interfaces. Both share the same internal register map but require distinct physical connections and protocol initialization. SPI uses dedicated CLK/MOSI/MISO/CS lines, while UART operates on a single open-drain TX line with configurable address for daisy-chaining.
How does StealthChop2 in the TMC2240AUU+ achieve silent motor operation?
StealthChop2 in the TMC2240AUU+ uses adaptive PWM frequency modulation and optimized blank time control to eliminate audible switching noise. It dynamically adjusts chopper parameters based on motor back-EMF and load, maintaining precise current regulation without the high-frequency harmonics typical of conventional constant-off-time choppers - resulting in near-silent operation below ~1000 steps/sec.
Can the TMC2240AUU+ operate without an external crystal or oscillator?
Yes - the TMC2240AUU+ includes a factory-trimmed internal RC oscillator (±5% accuracy) sufficient for most STEP/DIR and SPI applications. An external clock (1–16 MHz) may be applied to the CLK pin for higher timing precision in synchronous multi-axis systems or when tighter frequency stability is required for UART baud rate accuracy.
What diagnostic functions are available on the TMC2240AUU+?
The TMC2240AUU+ provides comprehensive diagnostics including overcurrent (OCP), thermal shutdown, undervoltage lockout (UVLO), short-to-ground/VS detection, open-load flagging, and stall detection via StallGuard2/4. Diagnostic status is accessible via SPI registers and configurable on DIAG0/DIAG1 pins - enabling real-time fault reporting and system-level safety monitoring.
TMC2240AUU+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for TMC2240AUU+ through Aetrix?
Please submit a Request for Quotation (RFQ) for TMC2240AUU+ 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+ reliable?
The price and inventory of TMC2240AUU+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMC2240AUU+ is usually 5 days.
3.What payment methods are accepted for TMC2240AUU+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMC2240AUU+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMC2240AUU+?
TMC2240AUU+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMC2240AUU+ 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+?
For technical support, including TMC2240AUU+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMC2240AUU+ requirements.
6.How does Aetrix verify that TMC2240AUU+ is sourced from the original manufacturer or authorized distributors?
All TMC2240AUU+ 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+ meets industry standards.
7.What is the process for return or replacement of TMC2240AUU+?
All TMC2240AUU+ units undergo pre-shipment inspection (PSI). If there is an issue with TMC2240AUU+, 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+ part is unused and in its original packaging.
Return procedure for TMC2240AUU+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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