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Analog Devices Inc./Maxim Integrated TMC2660-PA-T
- Part No.:
- TMC2660-PA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 44-LQFP
- Datasheet:
-
TMC2660-PA-T.pdf
- Description:
- IC MTR DRV BIPOLAR 3.3-5V 44PQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,761
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Product details
Overview
TMC2660-PA-T from TRINAMIC Motion Control GmbH & Co. KG is a highly integrated stepper motor driver IC with embedded power MOSFETs, designed for two-phase bipolar stepper motors. It delivers up to 2.8 A RMS (4 A peak) per coil, supports 30 V DC supply, and enables microstepping resolution up to 256 steps per full step via MicroPlyer™ interpolation. Its SpreadCycle™ chopper and StallGuard2™ sensorless load detection enable precise, low-vibration motion control in compact automation systems.
For engineers reviewing the TMC2660-PA-T datasheet, TMC2660-PA-T pinout, TMC2660-PA-T application, or TMC2660-PA-T equivalent, key selection criteria include its integrated 44-pin QFP package, STEP/DIR + SPI dual-interface support, CoolStep™ current optimization, stall detection via SG_TST output, and compatibility with 3.3 V/5 V logic systems - all critical for medical pumps, lab automation, and CNC positioning designs.
Technical Context
The TMC2660-PA-T implements a dual-H-bridge gate driver architecture with Break-Before-Make logic and synchronous rectification to minimize power loss. Its internal 15 MHz oscillator (or external 8–20 MHz clock input) drives SpreadCycle™ chopper operation, delivering high-fidelity sine-wave current profiles across speed and load ranges.
StallGuard2™ measures back-EMF on motor coils to generate a 10-bit load value (0–1023), while CoolStep™ dynamically scales coil current based on that value - reducing RMS current by up to 75% under light loads. The device supports standalone configuration via CFG pins (CSN/SCK/SDI) and full programmability via 20-bit SPI read/write commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Motor Current | Up to 2.8 A RMS (4 A peak) per coil - enables direct drive of NEMA 17–23 motors without external MOSFETs. |
| Supply Voltage | VS = 9–29 V DC - compatible with standard industrial 24 V rails and battery-powered portable equipment. |
| Microstep Resolution | 256 microsteps/full step (via MicroPlyer™ interpolation from 16-step input) - achieves smooth motion at low speeds without external step multipliers. |
| Chopper Algorithm | SpreadCycle™ - reduces torque ripple and acoustic noise vs. constant-off-time choppers, especially near zero-crossing. |
| Stall Detection | StallGuard2™ - provides 10-bit linear load measurement (0–1023) and active-high SG_TST output for stall indication without sensors. |
| Interface Support | STEP/DIR + SPI dual interface - allows legacy system integration or full real-time parameter tuning and diagnostics. |
| Protection Features | Short-to-GND, short-to-VS, overtemperature (136°C threshold), undervoltage lockout - ensures robust operation in unattended systems. |
Pinout & Package
Package: QFP-44, 10 mm × 10 mm, 0.8 mm pitch, exposed thermal pad (VSA/VSB connected to ground plane for thermal dissipation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OA1/OA2, OB1/OB2 (pins 2,3,5,6,10,11,23,24,26,27,28,29,31,32) | Half-bridge outputs (A/B phases) | Four parallel pins per phase reduce trace resistance and improve thermal conduction to PCB - required for 4 A peak current handling. |
| VSA/VSB (pins 4,30) | Bridge supply inputs | Connect directly to bulk VS capacitor bank; must be decoupled with ≥100 µF electrolytic + 100 nF ceramic for chopper ripple suppression. |
| SRA/SRB (pins 12,22) | Sense resistor inputs | Accept voltage drop across external sense resistors (e.g., 75 mΩ for 4 A peak); feed chopper comparator for current regulation. |
| STEP/DIR (pins 42,41) | Step & direction inputs | Support rising- or dual-edge triggering; internal 60 ns glitch filter prevents false stepping from EMI or cable bounce. |
| SG_TST (pin 38) | StallGuard2 output | Active-high open-drain signal asserts when StallGuard2 reading ≤ SGT threshold - used for stall interrupt or safety shutdown. |
| CSN/SCK/SDI (pins 18,16,15) | Standalone configuration inputs | Set current scale (CS=15/31), chopper hysteresis (HSTRT=2/6), and microstep mode (256 native / 16+interpolation) without SPI. |
Key Features
| Feature | Design Value |
|---|---|
| SpreadCycle™ chopper | Delivers smoother current waveforms than constant-off-time, reducing resonance and audible noise - critical for office and medical environments. |
| CoolStep™ current control | Reduces coil current in real time based on StallGuard2 load feedback, cutting power dissipation by up to 75% and eliminating need for oversized heatsinks. |
| MicroPlyer™ interpolation | Accepts 16-step STEP/DIR input and internally interpolates to true 256 microsteps - preserves timing simplicity while achieving high positional resolution. |
| StallGuard2™ sensorless load detection | Provides calibrated 10-bit mechanical load value (0–1023) for homing to endstops, adaptive current scaling, and stall-triggered fault response. |
| Integrated 5 V regulator (5VOUT) | Supplies internal analog circuitry and low-side gate drivers; requires only 470 nF ceramic capacitor - eliminates external LDO in most designs. |
Applications
| Lab Automation | Medical Fluid Handling |
|---|---|
|
Use Scenario: Precision syringe pump actuation in diagnostic analyzers requiring repeatable 0.1 µL dispense accuracy. IC Role / Device Role / Timing Role: TMC2660-PA-T acts as closed-loop stepper driver with StallGuard2-based stall detection to confirm plunger contact and prevent overpressure. Use Value: Eliminates need for external pressure sensors or limit switches; CoolStep™ reduces heat buildup during long idle periods between fluid draws. |
Use Scenario: Peristaltic pump control in dialysis machines where silent, vibration-free operation is mandatory for patient comfort. IC Role / Device Role / Timing Role: TMC2660-PA-T executes microstepped motion using SpreadCycle™ to suppress audible noise and mechanical resonance at 100–300 RPM. Use Value: Achieves <35 dB(A) acoustic emission at 1 m distance - meets IEC 60601-1 noise requirements without added shielding or damping. |
| CNC Positioning Systems | Office Equipment (Scanners/Printers) |
|
Use Scenario: X-Y gantry movement in desktop CNC mills where microstep smoothness directly impacts surface finish quality. IC Role / Device Role / Timing Role: TMC2660-PA-T receives STEP/DIR commands from motion controller and applies MicroPlyer™ interpolation to deliver true 256-step resolution at 1/16-step input rate. Use Value: Reduces low-speed vibration artifacts (e.g., "cogging") by >90% vs. basic chopper drivers - enabling sub-10 µm repeatability. |
Use Scenario: Document feeder and paper path actuation in multifunction printers requiring reliable start-stop motion under variable load. IC Role / Device Role / Timing Role: TMC2660-PA-T uses standalone mode (CFG pins) for plug-and-play integration, with ENN-controlled enable/disable for power gating between jobs. Use Value: Low quiescent current (<100 µA in ENN-disabled state) extends standby battery life in portable scanners; integrated protection avoids field failures from paper jams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB6600HG | Higher voltage rating (45 V), but no StallGuard2 or CoolStep; uses external sense resistors and discrete gate drivers. | Lacks sensorless stall detection and load-adaptive current control - requires external current sensing and firmware logic for similar functionality. | Choose for high-voltage (>30 V) industrial motors where advanced features are secondary to ruggedness and cost. |
| DRV8825 | Lower current (2.2 A RMS), no SpreadCycle™ or StallGuard2; relies on basic constant-off-time chopper and fixed microstep table. | Cannot achieve same low-noise performance or stall detection capability - unsuitable for medical or precision lab use cases. | Choose for cost-sensitive, low-power applications where 1/32 microstepping and basic protection suffice. |
Compared with TB6600HG and DRV8825, the TMC2660-PA-T delivers superior energy efficiency via CoolStep™, higher-resolution motion control through MicroPlyer™, and integrated diagnostics - reducing BOM count, firmware complexity, and thermal management overhead in compact, high-reliability systems.
Availability
TMC2660-PA-T is available at Aetrix Electronics and suitable for lab automation, medical fluid handling, and CNC positioning systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging in tape-and-reel format.
Supply support for TMC2660-PA-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
TRINAMIC Motion Control GmbH & Co. KG, headquartered in Hamburg, Germany, specializes in high-performance motion control ICs and embedded solutions for precision electromechanical systems.
The TMC2660 product line was engineered to replace discrete stepper driver designs with fully integrated, intelligent motor control - targeting applications demanding silence, efficiency, and sensorless diagnostics in space-constrained environments.
FAQ
What is the maximum continuous motor current supported by the TMC2660-PA-T?
The TMC2660-PA-T supports up to 2.8 A RMS (4 A peak) per coil continuously when properly heatsinked via its exposed thermal pad and PCB copper area. This rating assumes ambient temperature ≤ 50°C, 2-layer board with ≥2 oz copper, and adequate decoupling. Derating applies above 50°C ambient or with reduced copper area - consult Section 18.3 Thermal Characteristics in the TMC2660C datasheet for exact derating curves.
Does the TMC2660-PA-T require an external crystal oscillator?
No, the TMC2660-PA-T includes an internal 15 MHz oscillator and can operate without an external crystal. Pin CLK can be tied low to enable the internal oscillator; tying it high disables the oscillator until power-down. An external 8–20 MHz clock may be used for improved timing stability in high-precision applications like medical imaging stages, but is not required for standard operation.
How does StallGuard2™ work on the TMC2660-PA-T, and what is its primary output signal?
StallGuard2™ on the TMC2660-PA-T measures back-EMF asymmetry across motor coils during each chopper cycle to derive a 10-bit load value (0–1023). This value is accessible via SPI register read or used internally for CoolStep™. Its dedicated output is the SG_TST pin (pin 38), which asserts active-high when the measured load exceeds the programmed SGT threshold - enabling immediate hardware-level stall response without MCU intervention.
Can the TMC2660-PA-T operate in standalone mode without SPI communication?
Yes, the TMC2660-PA-T supports standalone mode using three configuration pins: CSN (current scale), SCK (chopper hysteresis), and SDI (microstep resolution). In this mode, it automatically enables SpreadCycle™, StallGuard2™, CoolStep™, and 136°C overtemperature protection. SPI remains available for diagnostics and advanced tuning, but is not required for basic STEP/DIR operation - ideal for rapid prototyping or cost-sensitive production.
What package type and pin count does the TMC2660-PA-T use?
The TMC2660-PA-T uses a QFP-44 (Quad Flat Package) with 44 leads, 10 mm × 10 mm body size, and 0.8 mm lead pitch. It features an exposed thermal pad on the underside for enhanced heat dissipation. Pin assignments match the TMC2660C-PA variant exactly - including duplicated motor output pins (OA1/OA2, OB1/OB2) for current sharing and thermal spreading.
TMC2660-PA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- stallGuard2™
- Package/Case:
- 44-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
- Technology:
- Power MOSFET
- Step Resolution:
- 1 ~ 1/256
- Applications:
- General Purpose
- Current - Output:
- 2.8A
- Voltage - Supply:
- 3.3V ~ 5V
- Voltage - Load:
- 9V ~ 30V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PQFP (10x10)
TMC2660-PA-T FAQ
1.How can I place an order for TMC2660-PA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for TMC2660-PA-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 TMC2660-PA-T reliable?
The price and inventory of TMC2660-PA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMC2660-PA-T is usually 5 days.
3.What payment methods are accepted for TMC2660-PA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMC2660-PA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMC2660-PA-T?
TMC2660-PA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMC2660-PA-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 TMC2660-PA-T?
For technical support, including TMC2660-PA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMC2660-PA-T requirements.
6.How does Aetrix verify that TMC2660-PA-T is sourced from the original manufacturer or authorized distributors?
All TMC2660-PA-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 TMC2660-PA-T meets industry standards.
7.What is the process for return or replacement of TMC2660-PA-T?
All TMC2660-PA-T units undergo pre-shipment inspection (PSI). If there is an issue with TMC2660-PA-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 TMC2660-PA-T part is unused and in its original packaging.
Return procedure for TMC2660-PA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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