Texas Instruments TMS320F28020DAT

Overview

TMS320F28020DAT from Texas Instruments is a 32-bit C28x-core microcontroller optimized for real-time motor control and digital power applications, operating at 40 MHz (25-ns cycle time), featuring 8 kB flash, 3 kB SARAM, 3 ePWM modules with HRPWM capability, 12-bit ADC (7-channel, 500-ns conversion), and integrated comparators. It targets compact inverter power stages and BLDC motor drives.

For engineers reviewing the TMS320F28020DAT datasheet, TMS320F28020DAT pinout, TMS320F28020DAT application, or TMS320F28020DAT equivalent, key selection criteria include its 38-pin TSSOP package, single 3.3-V supply operation, on-chip VREG, and support for closed-loop control via ePWM/HRPWM, ADC, and comparator peripherals.

Technical Context

The TMS320F28020DAT implements the C28x CPU core with Harvard bus architecture, atomic instructions, and unified memory model-enabling deterministic real-time execution. Its peripheral set includes three independent ePWM modules (each with high-resolution edge control), a 7-channel 12-bit ADC with dual sample-and-hold, and two analog comparators with internal 10-bit references routed to PWM trip zones.

Clocking relies on either internal zero-pin oscillators or external crystal (X1/X2) or clock input (XCLKIN), with watchdog timer, missing-clock detection, and programmable low-power modes. The device uses an internal voltage regulator for single-rail 3.3-V operation and supports JTAG debugging via dedicated pins multiplexed with GPIO.

Key Specifications

Pinout & Package

38-pin Thin Shrink Small-Outline Package (TSSOP), body size 12.5 mm × 6.2 mm, surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar real-time control applications.

Compared with TMS320F28021DAT and TMS320F28022DAT, the TMS320F28020DAT offers minimal footprint and lowest cost for basic single-loop motor control, trading flash/RAM headroom and I²C for reduced BOM and layout area in space-constrained inverters.

Availability

TMS320F28020DAT is available at Aetrix Electronics and suitable for air conditioner outdoor units, micro inverters, and AC drive power stage modules requiring stable component supply, long-term industrial lifecycle support, and consistent parametric performance across temperature.

Supply support for TMS320F28020DAT 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

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The TMS320F28020DAT belongs to TI's C2000™ real-time control MCU family, designed specifically for closed-loop digital power and motor control where deterministic timing, analog integration, and PWM precision are critical.

FAQ

What is the maximum operating frequency of the TMS320F28020DAT?

The TMS320F28020DAT operates at a maximum CPU frequency of 40 MHz, corresponding to a 25-ns instruction cycle time. This speed is fixed for this variant-unlike higher-tier F2802x devices (e.g., F28027) that run at 60 MHz-and is confirmed in the Device Comparison table and electrical specifications section of the SPRS523P datasheet.

Does the TMS320F28020DAT include an integrated voltage regulator?

Yes, the TMS320F28020DAT includes an on-chip voltage regulator (VREG) that generates the 1.8-V core supply from the 3.3-V input, enabling true single-rail operation. This eliminates external LDOs and simplifies power design-explicitly stated in the "Low cost for both device and system" feature list and Section 9.5 of the datasheet.

How many PWM channels does the TMS320F28020DAT support?

The TMS320F28020DAT supports 3 enhanced PWM (ePWM) modules, each providing complementary A/B outputs and high-resolution extension (HRPWM). This is verified in Table 6-1 (Device Comparison) and the "Enhanced control peripherals" feature list-distinct from F28027/F28026 variants which offer 4 ePWM modules.

Is the TMS320F28020DAT pin-compatible with other F2802x DA-package devices?

Yes, all 38-pin DA TSSOP variants in the F2802x family-including TMS320F28020DAT, TMS320F28021DAT, TMS320F28022DAT, and TMS320F28023DAT-share identical pinouts and package dimensions. This is confirmed in the Device Information table and Figure 7-2 (38-pin DA TSSOP pin assignments) of SPRS523P.

What communication interfaces are available on the TMS320F28020DAT?

The TMS320F28020DAT integrates one Serial Peripheral Interface (SPI) module and one Serial Communications Interface (SCI/UART) module. It does not include I²C-confirmed in Table 6-1, where I²C is marked "Yes" only for F28022 and above. SPI supports 4-level FIFO; SCI supports 4-level FIFO and auto-baud detection.