Monolithic Power Systems Inc. TBMA730-Q-RD-01A

Overview

TBMA730-Q-RD-01A from Monolithic Power Systems is a long-format (LT) evaluation board designed specifically for the MA730 MagAlpha magnetic position sensor. It provides side-shaft and end-of-shaft mounting configurations, features dual 8-pin 2.54mm headers (CN1/CN2), onboard decoupling capacitors (1µF ×2, 100nF ×1), and supports SPI interface plus optional incremental encoder outputs (A/B/Z) and PWM. It is used in rapid prototyping of motor commutation and angle-sensing systems.

For engineers reviewing the TBMA730-Q-RD-01A datasheet, TBMA730-Q-RD-01A pinout, TBMA730-Q-RD-01A application, or TBMA730-Q-RD-01A equivalent, this board enables immediate functional validation of MA730-based designs without custom PCB development - critical for servo drive tuning, BLDC FOC alignment, and encoder subsystem verification under real magnetic field conditions.

Technical Context

The TBMA730-Q-RD-01A implements Board Type 2 architecture per the TBMA User Guide Rev. 1.2, matching the MA730's pinout and I/O capabilities. It routes all essential SPI signals (CS, SCLK, MISO, MOSI), power (VDD, GND), test/debug (TEST), and configurable I/Os (IO1–IO6) to accessible headers, with no onboard voltage regulation - requiring external 3.3V supply.

It omits populated connectors (CN1/CN2 are not soldered per BOM), uses 0402 ceramic capacitors (Murata GRM155C81A105KA12D and GRM155R71C104KA88J), and supports both standard and high-speed SPI communication modes as defined in the MA730 datasheet. No level-shifting or signal conditioning circuitry is integrated.

Key Specifications

Availability

TBMA730-Q-RD-01A is available at Aetrix Electronics and suitable for servo drives, robotics motion control, and brushless DC motor commutation requiring stable component supply during design validation and small-batch testing phases.

Supply support for TBMA730-Q-RD-01A 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management and sensing solutions, with global design centers and ISO 9001-certified operations.

TBMA730-Q-RD-01A belongs to the TBMA test board product line, engineered to accelerate evaluation of MagAlpha magnetic position sensors across automotive, industrial, and robotics applications - emphasizing plug-and-play compatibility with EVKT-MagAlpha-MagDiff and MACOM kits.

FAQ

Does TBMA730-Q-RD-01A include populated connectors?

No. Per Table 4 (Type 2 BOM) in the TBMA User Guide Rev. 1.2, CN1 and CN2 are listed as "not populated" - users must solder 2.54mm 8-position receptacle connectors (e.g., Wurth 690367280876 or TE Connectivity 7-2178711-8) to interface with host controllers or test equipment.

What sensor is pre-mounted on TBMA730-Q-RD-01A?

The board ships with the MA730 MagAlpha magnetic position sensor pre-soldered and calibrated. This is confirmed in Table 1 (Board Type 2 listing) and Figure 8 (Type 2 overview), where TBMA730-Q-LT maps exclusively to MA730.

Which interface protocols does TBMA730-Q-RD-01A support?

It supports SPI communication (CS, SCLK, MISO, MOSI) and exposes six general-purpose I/O pins (IO1–IO6) that map to MA730 pins 1, 2, 3, 6, 9, and 15 - enabling configurable functions including MGH/MGL, error flags, or user-defined digital signals per the MA730 datasheet.

Is external power regulation required?

Yes. The board accepts only 3.3V via CN1.1 (VDD) and has no onboard voltage regulator or LDO. Users must provide a low-noise, well-decoupled 3.3V source - consistent with MA730's absolute maximum rating and recommended operating conditions.

Can TBMA730-Q-RD-01A be used with the EVKT-MagAlpha-MagDiff kit?

Yes. The TBMA User Guide explicitly states compatibility with EVKT-MagAlpha-MagDiff (page 1) and EVKT-MACOM (footnote 1, page 1). Mechanical and electrical interfaces align - both use identical 2.54mm header spacing and share SPI signal routing conventions.

What capacitor values are used for decoupling?

The board uses two 1µF X6S 0402 ceramic capacitors (C1, C2 - Murata GRM155C81A105KA12D) and one optional 100nF X7R 0402 capacitor (C2 in Type 2 schematic, Murata GRM155R71C104KA88J), placed per MA730 layout guidelines for stable core and I/O rail operation.