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Analog Devices Inc./Maxim Integrated TMC239A-SA-T
- Part No.:
- TMC239A-SA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TMC239A-SA-T.pdf
- Description:
- STEPPER MOTOR PREDRIVER IC, SPI,
- Quantity:
- Payment:
- Shipping:
Inventory:2,504
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Product details
Overview
TMC239A-SA-T from TRINAMIC Motion Control GmbH & Co. KG is a dual full-bridge stepper motor driver IC designed to control external N- and P-channel MOSFETs in two-phase bipolar stepper systems. It delivers up to 7 A RMS motor current, operates from 7–36 V DC motor supply and 3.3–5.5 V logic supply, supports microstepping up to 64× via analog voltage or SPI, and integrates mixed decay, slope control, and comprehensive diagnostics including overcurrent, open-load, and dual-level overtemperature detection - deployed in medical liquid handling, lab automation, and precision office equipment.
For engineers reviewing the TMC239A-SA-T datasheet, TMC239A-SA-T pinout, TMC239A-SA-T application, or TMC239A-SA-T equivalent, key selection considerations include its SO28 package with 8 external gate drive outputs (HA1/HA2/HB1/HB2/LA1/LA2/LB1/LB2), standalone analog or SPI interface flexibility, real-time diagnostic flag reporting (ERR, OT, OLA/OLB), and compatibility with motion controllers like TMC429 for multi-motor coordination.
Technical Context
The TMC239A-SA-T implements a fixed-frequency chopper with 180° phase-shifted coil control, supporting both pure SPI mode (12-bit command/status words) and classical analog mode (INA/INB current reference + PHA/PHB polarity). Its digital control architecture includes four independent DACs (two per bridge) for precise sine/cosine current profiling and mixed decay modulation that dynamically adjusts fast/slow decay timing based on current slope - enabling smooth low-noise operation even at high microstep resolution.
Protection is hardware-rooted: overvoltage shutdown triggers on ENN pin, high-side overcurrent detection uses RSH resistor with 150 mV threshold, and thermal protection features two-stage response (OTPW prewarning at 135°C, OT shutdown at 150°C). All diagnostics are reported synchronously via dedicated status bits in SPI readback or open-drain ERR pin in standalone mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Motor Current | Up to 7 A RMS - achieved using eight external MOSFETs; requires sense resistor (e.g., 0.10 Ω for 3.4 A full-scale) and RSH for high-side short-circuit limiting. |
| Supply Voltage Range | 7–36 V DC for VS (motor rail); 3.0–5.5 V DC for VCC (logic/analog rail) - enables direct integration into 12/24 V industrial power domains without LDO overhead. |
| Microstep Resolution | Up to 64 microsteps/revolution - selectable via analog INA/INB voltage (0–3 V) or SPI register programming; supports sine/cosine waveform generation for torque ripple reduction. |
| Interface Modes | SPI (12-bit command/status, daisy-chain capable) or standalone analog/digital (INA/INB + PHA/PHB + MDAN/MDBN) - allows firmware-light deployment or full microcontroller orchestration. |
| Thermal Protection | Dual-level overtemperature: OTPW flag at 135°C (prewarning), OT flag at 150°C (shutdown) - ensures safe thermal derating before silicon damage occurs. |
| Diagnostic Outputs | Real-time flags via SPI status word (OT, OTPW, UV, OCHS, OLA, OLB, OCA, OCB) or ERR pin (open-drain, active-high) - enables closed-loop fault recovery without polling. |
| Chopper Frequency | Internally generated (via OSC pin capacitor) or externally clocked - configurable for optimal EMI/noise trade-off; blank time adjustable via BL1/BL2 pins. |
Pinout & Package
Package: SO28 (10 × 18 mm²), surface-mount, thermally enhanced with exposed pad (GND-connected per datasheet layout guidelines).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HA1, HA2, HB1, HB2 | High-side gate drivers (P-channel) | Drive upper MOSFET gates; each pair controls one half-bridge; require external bootstrap or charge-pump circuitry for P-FET biasing. |
| LA1, LA2, LB1, LB2 | Low-side gate drivers (N-channel) | Directly drive lower N-MOSFET gates; sink capability supports fast turn-off and active freewheeling during decay phases. |
| SRA, SRB | Current sense inputs | Connect to sense resistors between motor coils and GND; comparator threshold scales with INA/INB voltage (0.17 × VIN × DAC setting). |
| INA, INB | Analog current reference inputs | Set base current scale (0–3 V); 2 V = 100% DAC range; used in both SPI and standalone modes for adaptive motor matching. |
| PHA, PHB | Digital polarity control | Define current direction per bridge (0 = OA1→OA2, OB1→OB2); latched on rising edge of chopper clock; restarts chopper cycle when toggled. |
| ENN | Enable/shutdown input | Active-low device enable; high state forces shutdown mode (all references off, SPI reset); also serves as overvoltage shutdown trigger. |
| ANN, SPE, SCK, SDI, SDO, CSN | SPI interface control | SPE high = SPI mode enabled; ANN low = INA/INB active in SPI mode; SCK/SDI/SDO/CSN follow standard 12-bit SPI protocol with MSB-first timing. |
| ERR | Diagnostic output | Open-drain error flag (active-high); asserts on overtemperature, overcurrent, open load, or undervoltage - usable for system-level fault interrupt. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed Decay Control | Self-stabilizing decay modulation per bridge - reduces torque ripple and resonance by dynamically shortening fast-decay duration during falling current, improving step accuracy at low speeds. |
| Slope Control (SLP) | Adjustable gate slew rate via external resistor to SLP pin - lowers dv/dt and electromagnetic emissions without sacrificing switching speed or efficiency. |
| Low-Noise Chopper | Fixed-frequency PWM with 180° inter-coil phase shift and programmable blank time - eliminates audible noise and minimizes current overshoot in sensitive applications like medical pumps. |
| Comprehensive Diagnostics | Hardware-monitored flags for open load (OLA/OLB), overcurrent (OCA/OCB/OCHS), overtemperature (OT/OTPW), and undervoltage (UV) - all accessible via SPI or ERR pin for deterministic fault handling. |
| Flexible Power Management | Three-tier power states: active (full drive), standby (coils off, oscillator disabled), shutdown (VCC references off, SPI held in reset) - reduces quiescent current to <100 µA in shutdown. |
Applications
| Lab Automation | Medical Liquid Handling |
|---|---|
|
Use Scenario: Precision syringe pump actuation in automated assay workstations requiring repeatable 0.1 µL dispense accuracy across 24/7 operation. IC Role / Device Role / Timing Role: Dual-bridge gate driver coordinating external MOSFETs to deliver smooth 64× microstepped motion while suppressing mechanical vibration-induced cross-contamination. Use Value: Mixed decay and slope control reduce acoustic noise below 35 dB(A) and eliminate step loss during rapid acceleration/deceleration profiles. |
Use Scenario: Reagent dispensing in point-of-care diagnostic analyzers where EMI must not interfere with embedded biosensor signal chains. IC Role / Device Role / Timing Role: SPI-configured stepper driver interfacing with TMC429 motion controller to synchronize multi-axis fluidic sequencing with sub-millisecond timing jitter. Use Value: Low-noise chopper and programmable blank time suppress conducted EMI below CISPR 11 Class B limits without added ferrites or shielding. |
| Office Automation | Antenna Positioning |
|
Use Scenario: High-torque paper feed and scanner carriage movement in multifunction printers operating in shared office environments. IC Role / Device Role / Timing Role: Standalone-mode driver using analog INA/INB and digital PHA/PHB signals to execute quiet, jerk-free motion without MCU intervention. Use Value: 7 A RMS current headroom enables direct drive of large-frame stepper motors, eliminating need for external current amplification stages. |
Use Scenario: Azimuth/elevation adjustment of compact satellite communication antennas in mobile base stations subject to thermal cycling and vibration. IC Role / Device Role / Timing Role: Robust gate driver with dual-level overtemperature monitoring (OTPW + OT) and open-load detection ensuring fail-safe stow position during thermal overload events. Use Value: Hardware-based diagnostics eliminate software polling latency, enabling <50 ms response to motor disconnect or thermal runaway conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMC249A-SA | Pin-compatible SO28 variant with integrated StallGuard sensorless stall detection and QFN option; identical current rating, voltage range, and interface support. | Required where rotor stall detection without external sensors is needed (e.g., end-stopless linear actuators, safety-critical positioning). | Select TMC249A-SA when stall detection adds value; TMC239A-SA-T remains optimal for cost-sensitive, sensor-equipped systems where StallGuard is redundant. |
| DRV8825PWPR | Integrated H-bridge (no external MOSFETs); max 2.2 A RMS; no analog current control; SPI absent; only step/dir interface. | Suitable for lower-current, space-constrained designs where external FET layout complexity must be avoided. | Choose DRV8825PWPR only for ≤2.2 A loads and fixed microstep settings; TMC239A-SA-T is required for >3 A, analog-adjustable current, or diagnostic visibility. |
Compared with TMC249A-SA, the TMC239A-SA-T omits StallGuard but retains identical gate drive performance and diagnostic depth; versus DRV8825PWPR, it trades integration for scalability, precision, and field-serviceable current tuning - making it the sole choice for high-power, high-integrity stepper systems demanding external MOSFET optimization and real-time fault telemetry.
Availability
TMC239A-SA-T is available at Aetrix Electronics and suitable for medical liquid handling, lab automation, and antenna positioning applications requiring stable component supply, long-term manufacturability, and traceable sourcing from authorized channels.
Supply support for TMC239A-SA-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 is a German semiconductor company specializing in high-precision motion control ICs, founded in Hamburg in 1997 and focused on intelligent motor drivers with embedded intelligence and ultra-low-noise operation.
The TMC239A-SA-T belongs to TRINAMIC's external-FET stepper driver family, engineered for applications demanding scalable current delivery, diagnostic transparency, and seamless integration with motion controllers like TMC429 - targeting medical, lab, and industrial automation where reliability and EMI compliance are non-negotiable.
FAQ
What is the maximum motor current supported by the TMC239A-SA-T?
The TMC239A-SA-T supports up to 7 A RMS motor current when paired with appropriately rated external N- and P-channel MOSFETs and properly sized sense resistors (e.g., 0.10 Ω for 3.4 A full-scale). This rating assumes adequate PCB copper area, thermal vias to internal ground planes, and forced airflow per TRINAMIC's SO28 thermal guidelines. The actual achievable current depends on MOSFET RDS(on), heatsinking, and ambient temperature - not an internal current limit of the TMC239A-SA-T itself.
Does the TMC239A-SA-T integrate power MOSFETs or require external ones?
The TMC239A-SA-T does not integrate power MOSFETs; it is a gate driver IC requiring eight external MOSFETs (four N-channel low-side and four P-channel high-side) to form two complete H-bridges. This architecture enables design flexibility across motor sizes and voltage classes - unlike monolithic drivers such as DRV8825. The TMC239A-SA-T provides dedicated HA1/HA2/HB1/HB2 and LA1/LA2/LB1/LB2 outputs with matched drive strength and timing control.
How does microstepping work on the TMC239A-SA-T - via SPI or analog inputs?
The TMC239A-SA-T supports microstepping through two independent paths: SPI mode (12-bit commands set per-microstep current amplitude and polarity for sine/cosine waveforms) or standalone analog mode (INA/INB set base current scale while PHA/PHB define polarity sequence). Both achieve up to 64 microsteps/revolution. In SPI mode, the TMC239A-SA-T executes microsteps commanded by the host; in standalone mode, external analog waveforms generate smooth motion without MCU involvement.
What diagnostic functions does the TMC239A-SA-T provide, and how are they accessed?
The TMC239A-SA-T provides hardware-monitored diagnostics including overtemperature (OT/OTPW), overcurrent (OCA/OCB/OCHS), open load (OLA/OLB), and undervoltage (UV). These are reported either via dedicated bits in the 12-bit SPI status word (read after each command) or through the open-drain ERR pin in standalone mode. No software polling is required - faults assert immediately upon detection, enabling deterministic system-level response within microseconds.
Is the TMC239A-SA-T pin-compatible with any other TRINAMIC drivers?
Yes, the TMC239A-SA-T is pin-compatible with the TMC249A-SA in the SO28 package. Both share identical pinout, electrical characteristics, and functional interface - differing only in integrated features: the TMC249A-SA adds StallGuard sensorless stall detection and offers a QFN package option. This allows drop-in replacement where StallGuard is not required, preserving PCB layout and firmware while upgrading diagnostics if needed later.
TMC239A-SA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- -
- Function:
- Controller - Speed
- Output Configuration:
- Half Bridge (4)
- Interface:
- SPI
- Technology:
- CMOS
- Step Resolution:
- 1 ~ 1/64
- Applications:
- General Purpose
- Current - Output:
- 4A
- Voltage - Supply:
- 3V ~ 5.5V
- Voltage - Load:
- 7V ~ 34V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SO
TMC239A-SA-T FAQ
1.How can I place an order for TMC239A-SA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for TMC239A-SA-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 TMC239A-SA-T reliable?
The price and inventory of TMC239A-SA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMC239A-SA-T is usually 5 days.
3.What payment methods are accepted for TMC239A-SA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMC239A-SA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMC239A-SA-T?
TMC239A-SA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMC239A-SA-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 TMC239A-SA-T?
For technical support, including TMC239A-SA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMC239A-SA-T requirements.
6.How does Aetrix verify that TMC239A-SA-T is sourced from the original manufacturer or authorized distributors?
All TMC239A-SA-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 TMC239A-SA-T meets industry standards.
7.What is the process for return or replacement of TMC239A-SA-T?
All TMC239A-SA-T units undergo pre-shipment inspection (PSI). If there is an issue with TMC239A-SA-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 TMC239A-SA-T part is unused and in its original packaging.
Return procedure for TMC239A-SA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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