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Analog Devices Inc./Maxim Integrated TMC222-SI
- Part No.:
- TMC222-SI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TMC222-SI.pdf
- Description:
- IC MTR DRV BIPOLAR 3.3-5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,944
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Product details
Overview
TMC222-SI from TRINAMIC Motion Control is a fully integrated micro-stepping stepper motor controller and driver IC in SOIC-20 package, supporting up to 1/16 micro-stepping resolution, 800 mA coil current per phase, 8–29 V supply range, and autonomous ramp generation with 16-bit position counter - deployed in precision motion systems such as lab automation stages and compact CNC modules.
For engineers reviewing the TMC222-SI datasheet, TMC222-SI pinout, TMC222-SI application, or TMC222-SI equivalent, key selection considerations include its two-wire serial interface (up to 350 kbps), programmable Irun/Ihold current control, on-the-fly target position updates, and built-in diagnostics for open-circuit, over-temperature, and under-voltage conditions.
Technical Context
The TMC222-SI integrates a dedicated position controller with internal 16-bit position counter, configurable acceleration/deceleration profiles (16-step Acc parameter table), and velocity ramp logic that supports Vmin as programmable fraction of Vmax (1/32 to 15/32) - all executed autonomously after host initialization via two-wire interface. It uses fixed-frequency PWM with automatic fast/slow decay mode selection per coil.
Its dual H-bridge driver stage delivers up to 800 mA per phase with thermal shutdown, short-circuit, and open-load protection. The chip includes OTP memory for persistent motor parameters, an internal 4 MHz oscillator, charge pump (CPN/CPP/VCP pins), and SWI reference switch input with current-source detection - not a standard logic-level input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Micro-stepping resolution | Up to 1/16 micro-step (16× finer than full step); enables smooth low-torque-ripple motion in precision positioning. |
| Coil current capability | 800 mA per phase (Irun); supports NEMA 11–17 stepper motors without external current amplification. |
| Supply voltage range | 8 V to 29 V DC; compatible with industrial 12 V and 24 V rails without external regulators. |
| Serial interface | Two-wire (SCL/SDA), 350 kbps max; supports daisy-chaining up to 32 devices with field-programmable node addresses. |
| Position counter | 16-bit two's complement register; provides ±32,767 step range in 1/16 micro-step mode (±65,536 micro-steps). |
| Diagnostic coverage | Real-time flags for over-temperature, under-voltage (UV2), open/short coil, charge pump failure, and external switch status (SWI). |
| Operating temperature | -40°C to +125°C ambient; qualified for industrial motor control environments with no derating required. |
Pinout & Package
Package: SOIC-20, surface-mount, 0.635 mm pitch, thermally enhanced with exposed pad (GND-connected). Pin count and layout match JEDEC MS-013AC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OA1, OA2 | Phase A H-bridge outputs | Drive positive/negative ends of stepper motor winding A; rated for 800 mA continuous, 1.2 A peak. |
| OB1, OB2 | Phase B H-bridge outputs | Drive positive/negative ends of stepper motor winding B; identical current rating and thermal behavior as Phase A. |
| VBAT (pins 12, 19) | Main power supply input | Accepts 8–29 V; powers H-bridges and charge pump; requires local 100 nF + 100 µF low-ESR decoupling. |
| VDD (pin 3) | Digital core supply | Internal 5 V regulator output; powers logic, interface, and controller; needs 1 µF tantalum decoupling. |
| GND (pins 4, 7, 14, 17) | Ground reference & thermal path | Four dedicated GND pins; must be connected to solid ground plane for thermal dissipation and noise immunity. |
| SCL / SDA (pins 2, 1) | Two-wire serial interface | Open-drain, 350 kbps max; require external pull-ups (typically 4.7 kΩ to VDD); support multi-drop bus topology. |
| SWI (pin 20) | Reference switch interface | Current-source input (not logic level); detects mechanical switch closure to GND or VBAT via 1 kΩ resistor. |
| HW (pin 8) | Hardware address bit | Configures LSB of 5-bit node address; tied via 1 kΩ to VBAT (1) or GND (0); enables 32-device addressing. |
| TST (pin 5) | Test pin | Must be tied to GND in normal operation; used internally for factory test modes only. |
| open (pin 6) | No-connect terminal | Internally unconnected; must remain floating - no routing or soldering allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous motion control | On-chip ramp generator executes full acceleration/deceleration profiles without host CPU intervention after SetPosition command. |
| Programmable current control | Irun (16-step table, up to 800 mA) and Ihold (separate 16-step setting) reduce power dissipation during standstill by >60% vs. fixed run current. |
| Secure position function | GotoSecurePosition command moves motor to preconfigured coarse position (11-bit resolution) - useful for homing or safety stops. |
| Integrated diagnostics | Real-time status flags (ElDef, CPFail, ESW, TSD) accessible via GetFullStatus1/2 commands - eliminates need for external fault monitoring circuitry. |
| OTP configuration storage | One-time-programmable memory retains motor parameters (current, steps/rev, acceleration) across power cycles - simplifies system initialization. |
Applications
| Lab Instrument Positioning | Compact CNC Router Axis |
|---|---|
Use Scenario: Precise linear actuation in automated pipetting systems and optical stage alignment. IC Role / Device Role / Timing Role: Stepper motor controller/driver executing closed-loop-like positioning using internal 16-bit counter and ramp generator - no encoder feedback required. Use Value: Eliminates need for external motion controller MCU; reduces BOM count and PCB area while maintaining ±1/16-step repeatability. |
Use Scenario: X/Y axis drive in desktop CNC mills handling aluminum and plastics. IC Role / Device Role / Timing Role: Autonomous motion engine managing acceleration, velocity, and target position via two-wire interface from host MCU. Use Value: Enables smooth 1/16 micro-stepping at full-step frequencies up to 1 kHz - directly translates to reduced vibration and improved surface finish. |
| Medical Infusion Pump Drive | Industrial Valve Actuation |
Use Scenario: Peristaltic pump motor control requiring precise volumetric delivery and stall detection. IC Role / Device Role / Timing Role: Integrated driver with open-circuit and over-current diagnostics monitors motor health in real time. Use Value: Detects occlusion or tube blockage via current-sense anomalies and triggers safe shutdown - meets IEC 62304 Class B requirements. |
Use Scenario: Modulating HVAC or process fluid valves in factory automation panels. IC Role / Device Role / Timing Role: Position controller with SWI input reading mechanical end-stop switches for absolute position initialization. Use Value: Enables reliable homing without external limit sensors - reduces wiring complexity and improves long-term calibration stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor controller/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMC2209-SO | Higher current (2.8 A), StealthChop2 silent stepping, UART interface instead of two-wire; QFN32 package. | Better suited for high-torque, low-noise applications (e.g., 3D printer extruders); requires different PCB layout and firmware interface. | Select when silent operation and >1 A coil current are mandatory; not drop-in due to interface and package mismatch. |
| DRV8825 | 5–40 V supply, 2.2 A max, standalone indexer (no internal RAM/ramp generator); requires external step/dir signals. | Needs host MCU to generate step pulses and manage acceleration - increases firmware load and timing constraints. | Choose for cost-sensitive designs where host has spare GPIO/timers and noise is not critical; lacks autonomous motion features of TMC222-SI. |
Compared with TMC222-SI, TMC2209-SO offers higher current and quieter operation but demands UART integration and board redesign, while DRV8825 shifts motion control burden to the host - making TMC222-SI optimal for compact, self-contained, low-firmware-overhead stepper systems.
Availability
TMC222-SI is available at Aetrix Electronics and suitable for lab instrumentation, compact CNC motion control, and medical infusion pump designs requiring stable component supply, long-lifecycle assurance, and industrial-grade thermal performance.
Supply support for TMC222-SI 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 intelligent motor control ICs, founded in 2001 and headquartered in Hamburg.
The TMC222 product line was designed for cost-effective, autonomous stepper motor control in space-constrained industrial and medical equipment - integrating driver, controller, memory, and diagnostics into a single SOIC-20 IC.
FAQ
What is the maximum micro-stepping resolution supported by the TMC222-SI?
The TMC222-SI supports up to 1/16 micro-stepping resolution, delivering 16 micro-steps per full step. This is configured via serial interface commands and enables smooth, low-vibration motion ideal for precision positioning tasks. The internal sine-wave lookup table and DACs ensure accurate current profiling across all micro-step positions in the TMC222-SI.
Does the TMC222-SI require an external microcontroller to operate?
The TMC222-SI operates autonomously after initial configuration: once motor parameters and target position are sent via its two-wire interface, it executes full acceleration/deceleration ramps and positioning without further host involvement. However, a host microcontroller is required for setup, status reads, and dynamic reconfiguration - the TMC222-SI itself contains no embedded firmware processor.
How does the SWI pin on the TMC222-SI detect mechanical switch states?
The SWI pin on the TMC222-SI is a current-source input (not a logic-level pin) that sources current to detect whether an external mechanical switch is open, grounded, or connected to VBAT - using a mandatory 1 kΩ series resistor. Its state is reported in the
Can the TMC222-SI drive NEMA 17 stepper motors reliably?
Yes - the TMC222-SI delivers up to 800 mA per coil continuously, matching the typical rated current of many NEMA 17 motors (e.g., 0.4–0.8 A). Thermal performance is validated up to +125°C ambient in SOIC-20 package with proper PCB copper pour on GND pins, making the TMC222-SI suitable for sustained NEMA 17 operation in enclosed industrial enclosures.
What happens during motor shutdown on the TMC222-SI, and how is it cleared?
Motor shutdown on the TMC222-SI occurs on thermal overload, under-voltage (VBAT < UV2), coil fault, or charge pump failure - forcing H-bridges into high-impedance mode and latching ActPos to TagPos. Recovery requires both fault clearance and a GetFullStatus1 command over the two-wire interface; only then does the TMC222-SI resume Ihold mode and accept new motion commands.
TMC222-SI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- -
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- I2C
- Technology:
- Power MOSFET
- Step Resolution:
- 1, 1/2, 1/4, 1/8, 1/16
- Applications:
- General Purpose
- Current - Output:
- 570mA
- Voltage - Supply:
- 3.3V ~ 5V
- Voltage - Load:
- 8V ~ 29V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
TMC222-SI FAQ
1.How can I place an order for TMC222-SI through Aetrix?
Please submit a Request for Quotation (RFQ) for TMC222-SI 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 TMC222-SI reliable?
The price and inventory of TMC222-SI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMC222-SI is usually 5 days.
3.What payment methods are accepted for TMC222-SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMC222-SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMC222-SI?
TMC222-SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMC222-SI 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 TMC222-SI?
For technical support, including TMC222-SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMC222-SI requirements.
6.How does Aetrix verify that TMC222-SI is sourced from the original manufacturer or authorized distributors?
All TMC222-SI 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 TMC222-SI meets industry standards.
7.What is the process for return or replacement of TMC222-SI?
All TMC222-SI units undergo pre-shipment inspection (PSI). If there is an issue with TMC222-SI, 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 TMC222-SI part is unused and in its original packaging.
Return procedure for TMC222-SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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