Texas Instruments LF2406APZA-GREE

Overview

LF2406APZA-GREE from Texas Instruments is a 32-bit fixed-point DSP controller based on the TMS320C2xx CPU core, designed for digital motor control. It delivers 40 MIPS at 40 MHz, integrates dual event-manager modules (EVA/EVB), a 10-bit ADC with 16-channel multiplexing and 500-ns minimum conversion time, and supports CAN 2.0B, SCI, and SPI interfaces - all in a 100-pin LQFP package for industrial inverter systems.

For engineers reviewing the LF2406APZA-GREE datasheet, LF2406APZA-GREE pinout, LF2406APZA-GREE application, or LF2406APZA-GREE equivalent, key selection criteria include its dual EV module PWM capability, on-chip 32K-word Flash memory with code-security, 3.3-V low-power operation, and CAN/SCI communication support for real-time motor feedback loops.

Technical Context

The LF2406APZA-GREE implements a static CMOS-based C2xx DSP core with instruction cycle time of 25 ns and full code compatibility with TMS320F243/F241/C242 devices. Its dual event-manager architecture provides 12 PWM outputs, 6 capture inputs, and quadrature encoder interface logic - all synchronized to ADC conversions for precise timing-critical motor phase control.

It features a PLL-based clock generator supporting external crystal or clock input, programmable deadband insertion per PWM channel to prevent shoot-through faults, and input-qualifier circuitry on PDPINTx, CAPx, QEPx, XINT1/2, and ADCSOC pins to suppress noise-induced false triggers in noisy power electronics environments.

Key Specifications

Pinout & Package

LF2406APZA-GREE is housed in a 100-pin Low-Profile Quad Flat Package (LQFP, PZ) with exposed thermal pad. Pin functions are shared across GPIO, peripheral, and power domains; all power pins (VDD, VDDO, VCCA, VSS, VSSO) must be connected per TI design guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DSP controller applications.

Compared with LF2406APZA-GREE, the LF2407APGEA enables scalable memory expansion but requires PCB redesign, while the LC2406APZA eliminates Flash endurance concerns and reduces unit cost at the expense of firmware update capability.

Availability

LF2406APZA-GREE is available at Aetrix Electronics and suitable for AC induction motor drives, BLDC controllers, switched reluctance systems, and industrial power converters requiring stable component supply across extended product lifecycles.

Supply support for LF2406APZA-GREE 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 specializing in analog, embedded processing, and connectivity technologies with decades of motor control IP leadership.

The TMS320LF240xA product line was engineered specifically for cost-sensitive, high-reliability digital motor control - integrating event managers, precision ADCs, and real-time communication to replace multi-chip MCU+ASIC solutions.

FAQ

What is the maximum ADC sampling rate achievable with LF2406APZA-GREE?

The LF2406APZA-GREE supports a minimum ADC conversion time of 500 ns, enabling up to 2 MSPS aggregate sampling across its 16 channels when using twin autosequencers. Actual sustained rate depends on sequencer configuration and CPU overhead, but single-channel throughput can reach 2 MS/s with proper trigger alignment to EV timers.

Does LF2406APZA-GREE support CAN FD or only classical CAN 2.0B?

The LF2406APZA-GREE implements only the classical CAN 2.0B protocol (ISO 11898-1:1993) with 11-bit identifiers and up to 1 Mbit/s data rate. It does not support CAN FD features such as variable bit rates, extended data length, or CRC enhancements - those require newer C2000™ generations like F2837x or F28004x.

How is code security implemented in LF2406APZA-GREE?

LF2406APZA-GREE uses a password-based "code-security" feature that locks access to on-chip Flash memory. Once enabled, unauthorized read attempts return invalid data, and debug access via JTAG is blocked unless the correct 128-bit password is provided - preventing firmware reverse engineering or cloning in production units.

Can LF2406APZA-GREE operate without an external crystal?

Yes - LF2406APZA-GREE supports both external crystal (via XTAL1/XTAL2) and external clock input (via CLKIN pin). The internal PLL can multiply either source to generate system clocks up to 40 MHz. Crystal-less operation is valid if a stable external clock meeting jitter and slew-rate specs is supplied.

What is the function of the PDPINTA pin on LF2406APZA-GREE?

The PDPINTA pin on LF2406APZA-GREE is a falling-edge-triggered hardware interrupt that immediately disables all EVA PWM outputs by forcing them into high-impedance state. It is used for fast-response protection against overcurrent, overtemperature, or overvoltage faults in motor drive stages - bypassing software latency for sub-microsecond safety response.