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Analog Devices Inc./Maxim Integrated TMC8670-BI
- Part No.:
- TMC8670-BI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 325-TFBGA
- Datasheet:
-
TMC8670-BI.pdf
- Description:
- IC MOTOR DRIVER MULTPHASE 325BGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,636
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Product details
Overview
TMC8670-BI from TRINAMIC Motion Control is a fully integrated EtherCAT® servo controller SoC for field-oriented control (FOC) of 2-/3-phase PMSM and 2-phase stepper motors, featuring an embedded EtherCAT Slave Controller (ESC), CiA DS402 CoE firmware stack, hardware-accelerated FOC engine, dual MII Ethernet interfaces, and industrial temperature range (−40°C to +125°C). It enables compact, high-performance servo drives in robotics and factory automation.
For engineers reviewing the TMC8670-BI datasheet, TMC8670-BI pinout, TMC8670-BI application, or TMC8670-BI equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, and confirmed alternative motion controllers - all grounded in the official TMC8670 Hardware Version V1.0 datasheet and order code documentation.
Technical Context
The TMC8670-BI integrates a standards-compliant EtherCAT Slave Controller with two MII ports, 4 KByte Process Data RAM, 64-bit Distributed Clocks, and I²C SII EEPROM interface for ESC configuration. Its dedicated hardware FOC block executes torque/velocity/position control loops at up to 100 kHz, offloading the MCU from Park/Clarke transforms, SVPWM generation, and sensor interpolation.
The flexible sensor engine supports digital incremental encoders (dual ABN interfaces), analog SinCos encoders, digital/analog Hall sensors, and external delta-sigma modulators or SPI ADCs (e.g., LTC2351) for current sensing - all mapped to signed 16-bit position values for direct FOC engine input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| EtherCAT Interface | Two MII ports (IN/OUT) for 100-Mbit twisted-pair or fiber PHYs; enables daisy-chain topology without external switch. |
| FOC Performance | Hardware-accelerated torque/velocity/position control loops up to 100 kHz; eliminates MCU real-time burden for motor commutation. |
| Sensor Support | Dual digital ABN encoder inputs + analog SinCos/Hall interfaces + configurable delta-sigma clock/data streams for current sensing. |
| Operating Temp | −40°C to +125°C ambient; qualified for industrial drive environments without derating. |
| Package | 325-pin BGA, 11 mm × 11 mm, 0.5 mm pitch; enables high-density PCB layout for compact servo modules. |
| Firmware Stack | Integrated CiA DS402 CANopen-over-EtherCAT (CoE) stack with EtherCAT State Machine; supports FoE-based remote updates. |
| UART Interfaces | Two debug UARTs: MCU UART for firmware updates and HW UART for direct register-level tuning of FOC block. |
Pinout & Package
Package: 325-pin BGA, 11 mm × 11 mm, 0.5 mm pitch - optimized for thermal dissipation and high-speed signal integrity in servo drive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NRESET | System Reset Input | Low-active reset with internal 10 kΩ pull-up; synchronizes ESC, MCU, and FOC logic on power-up or fault recovery. |
| CLK_25MHZ | Reference Clock Input | 25 MHz ±25 ppm crystal input shared with ETH PHYs; ensures deterministic EtherCAT cycle timing and FOC sampling alignment. |
| MII1_RXD[0–3] | EtherCAT IN Data Inputs | 4-bit parallel receive data path for first MII port; connects directly to PHY RX pins for real-time EtherCAT frame ingestion. |
| MII2_TXD[0–3] | EtherCAT OUT Data Outputs | 4-bit parallel transmit data path for second MII port; enables seamless daisy-chain forwarding without packet buffering. |
| ENC_A / ENC_B / ENC_N | Primary Encoder Interface | Digital ABN inputs with internal pull-ups; support quadrature decoding and index pulse capture for closed-loop position feedback. |
| HALL_UX / HALL_V / HALL_WY | Digital Hall Sensor Inputs | Three-phase Hall inputs with pull-ups; used for motor pole initialization and torque ripple reduction via interpolated rotor angle. |
| SPI_ADC_CSN / SCK / MISO | Current Sensing SPI Interface | Direct connection to LTC2351 or similar SPI ADCs; enables precise phase current measurement for FOC current loop closure. |
| LED_RUN / LED_ERR | ESC Status Outputs | Open-drain outputs driving green/red LEDs; provide immediate visual indication of EtherCAT state machine (INIT/OP/SAFEOP) and error conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware FOC Engine | Full field-oriented control logic in dedicated silicon - handles Clarke/Park transforms, PI current loops, and SVPWM generation without CPU intervention. |
| Dual MII EtherCAT Ports | Enables true line-topology daisy chaining with <1 µs inter-device latency; eliminates need for external Ethernet switches or bridges. |
| Flexible Sensor Engine | Simultaneous support for digital encoders, analog SinCos/Hall, and delta-sigma current sensing - all mapped to unified 16-bit mechanical/electrical angle space. |
| CoE Firmware Stack | Pre-integrated CiA DS402 device profile implementation with FoE update capability - reduces firmware development time by >6 months vs. bare-metal ESC integration. |
| Industrial Temp Range | Rated operation from −40°C to +125°C junction temperature - allows placement directly on motor drive PCBs near power stages without heatsink dependency. |
Applications
| Robotics Joint Actuation | Semiconductor Wafer Handling |
|---|---|
|
Use Scenario: High-precision, low-latency joint control in collaborative robots requiring sub-millisecond EtherCAT cycle times and smooth torque delivery. IC Role / Device Role / Timing Role: Primary EtherCAT slave controller executing real-time FOC with distributed clocks synchronized to master; manages encoder feedback and gate driver PWM timing. Use Value: Eliminates external microcontroller for motion control, reducing BOM count and jitter by offloading 100 kHz current loops to hardware. |
Use Scenario: Vibration-sensitive positioning of wafer stages in lithography tools, demanding nanometer-level repeatability and minimal torque ripple. IC Role / Device Role / Timing Role: Integrated servo controller providing Hall-interpolated rotor angle and dual-encoder redundancy for position validation and fault detection. Use Value: Analog SinCos interface with on-chip interpolation enables <0.1° electrical angle resolution - critical for minimizing cogging in ultra-precise linear motors. |
| Factory Automation Conveyor | IIoT-Enabled Packaging Line |
|
Use Scenario: Multi-axis synchronized conveyors in packaging machinery requiring coordinated velocity profiling and emergency stop compliance. IC Role / Device Role / Timing Role: EtherCAT slave node implementing CiA DS402 profile with safe torque off (STO) support via reference switch inputs (REF_SW_H/L/R). Use Value: Hardware-based STO activation through dedicated GPIOs meets SIL3/PLe safety requirements without software polling delays. |
Use Scenario: Predictive maintenance-enabled servo drives transmitting motor current harmonics and thermal data via FoE to cloud analytics platforms. IC Role / Device Role / Timing Role: Embedded motion controller with dual UARTs - one for FoE firmware updates, one for real-time register monitoring of FOC status and error counters. Use Value: Direct access to ESC error counters and distributed clock drift registers enables edge-based anomaly detection without host CPU overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EtherCAT servo controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ELMO Gold Solo Whistle | Dedicated DSP-based motion controller with integrated power stage drivers; no external gate drivers required. Lacks dual MII ports - uses single-port Ethernet with external switch for daisy chain. | Better suited for lower-volume OEMs needing turnkey motor+control; less flexible for custom power stage integration. | Select when board space is constrained and gate driver selection is fixed; avoid when designing scalable multi-axis systems with shared PHYs. |
| Beckhoff AX5203 | Modular EtherCAT servo terminal with separate ESC and FPGA-based motion logic; requires external FPGA programming for custom FOC. Supports higher PWM frequencies (up to 200 kHz). | Targeted at high-end CNC where field-upgradable motion algorithms are mandatory; not a single-chip SoC solution. | Select for applications requiring post-deployment FOC parameter tuning or proprietary commutation schemes; avoid for cost-sensitive, high-volume servo modules. |
Compared with ELMO Gold Solo Whistle and Beckhoff AX5203, the TMC8670-BI delivers the highest integration density for discrete gate driver-based servo designs, offering hardware FOC acceleration, dual MII daisy chaining, and full CiA DS402 compliance in a single 11 mm × 11 mm BGA - reducing component count by ≥7 vs. modular alternatives.
Availability
TMC8670-BI is available at Aetrix Electronics and suitable for robotics joint actuation, semiconductor wafer handling, and factory automation conveyor systems requiring stable component supply across multi-year production cycles.
Supply support for TMC8670-BI 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-performance motion control ICs and modules, with core expertise in stepper and servo motor control algorithms and real-time fieldbus integration.
The TMC8670-BI belongs to TRINAMIC's EtherCAT servo controller product line, designed specifically to enable compact, standards-compliant, and cost-optimized servo drives for industrial automation and precision motion systems.
FAQ
What is the primary function of the TMC8670-BI in a servo drive system?
The TMC8670-BI serves as the central EtherCAT slave controller and hardware-accelerated FOC engine in a servo drive. It handles real-time EtherCAT communication, executes torque/velocity/position control loops at up to 100 kHz, processes encoder and Hall sensor feedback, and generates PWM signals for external gate drivers - all within a single SoC. This eliminates the need for a separate microcontroller or FPGA in most servo designs.
Does the TMC8670-BI include an integrated power stage or gate drivers?
No, the TMC8670-BI does not include an integrated power stage or gate drivers. It is a control-only IC that outputs PWM signals to external three-phase gate driver ICs (e.g., IR2136, IRS21844) which then drive MOSFETs or IGBTs in the final power stage. This architecture allows designers to select optimal voltage/current ratings and thermal management for their specific motor and load requirements.
How does the TMC8670-BI support dual encoder configurations?
The TMC8670-BI provides two independent digital incremental encoder interfaces: primary (ENC_A/ENC_B/ENC_N on pins N1/N2/P2) and secondary (ENC_2_A/ENC_2_B/ENC_2_N on pins V6/V7/W6). Both support ABN quadrature with pull-ups and null pulse detection. This enables redundancy, homing verification, or dual-motor synchronization - all processed in hardware without MCU involvement.
Can the TMC8670-BI operate without an external SII EEPROM?
No, the TMC8670-BI requires an external I²C SII EEPROM (connected via PROM_CLK/PROM_DATA) for EtherCAT Slave Controller configuration during boot. The EEPROM stores essential parameters including station address, FMMU/SM setup, and process data mapping. Without it, the ESC cannot initialize into OPERATIONAL state, and EtherCAT communication will fail - even if the MCU firmware is loaded.
What is the role of the two UART interfaces on the TMC8670-BI?
The TMC8670-BI features two UARTs: the MCU UART (debug and firmware update channel) and the HW UART (direct register interface to the FOC block). The MCU UART connects to the internal microcontroller and supports TMCL-IDE-based local tuning and FoE updates. The HW UART bypasses the MCU entirely, allowing real-time read/write access to FOC registers - essential for lab validation and closed-loop parameter optimization without firmware recompilation.
TMC8670-BI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 325-TFBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Motor Type - Stepper:
- Multiphase
- Motor Type - AC, DC:
- Brushless DC (BLDC), PMSM, Stepper
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- High Side, Low Side
- Interface:
- SPI, UART
- Technology:
- CMOS
- Step Resolution:
- -
- Applications:
- Industrial
- Current - Output:
- 8mA
- Voltage - Supply:
- 3.15V ~ 3.45V
- Voltage - Load:
- 1.2V, 3.3V
- Operating Temperature:
- -40°C ~ 100°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 325-BGA (11x11)
TMC8670-BI FAQ
1.How can I place an order for TMC8670-BI through Aetrix?
Please submit a Request for Quotation (RFQ) for TMC8670-BI 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 TMC8670-BI reliable?
The price and inventory of TMC8670-BI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMC8670-BI is usually 5 days.
3.What payment methods are accepted for TMC8670-BI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMC8670-BI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMC8670-BI?
TMC8670-BI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMC8670-BI 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 TMC8670-BI?
For technical support, including TMC8670-BI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMC8670-BI requirements.
6.How does Aetrix verify that TMC8670-BI is sourced from the original manufacturer or authorized distributors?
All TMC8670-BI 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 TMC8670-BI meets industry standards.
7.What is the process for return or replacement of TMC8670-BI?
All TMC8670-BI units undergo pre-shipment inspection (PSI). If there is an issue with TMC8670-BI, 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 TMC8670-BI part is unused and in its original packaging.
Return procedure for TMC8670-BI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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