STMicroelectronics STM32F302RDT7

Overview

STM32F302RDT7 from STMicroelectronics is a 32-bit ARM® Cortex®-M4 microcontroller with FPU, operating at up to 72 MHz, featuring 384 KB Flash, 64 KB SRAM (with HW parity on first 32 KB), dual 12-bit ADCs (18-channel, 0.20 µs conversion), one 12-bit DAC, four rail-to-rail comparators, and two programmable operational amplifiers - deployed in motor control systems requiring real-time analog signal conditioning and PWM generation.

For engineers reviewing the STM32F302RDT7 datasheet, STM32F302RDT7 pinout, STM32F302RDT7 application, or STM32F302RDT7 equivalent, key selection criteria include integrated analog peripherals (OPAMP+COMP+DAC), 72 MHz FPU-enabled DSP capability, LQFP64 package compatibility, and support for advanced timer deadtime control in industrial actuator drives.

Technical Context

The STM32F302RDT7 implements an ARM Cortex-M4 core with hardware floating-point unit and memory protection unit (MPU), enabling deterministic real-time execution of motor control algorithms and digital power supply regulation. Its interconnect matrix decouples peripheral bus arbitration from CPU timing, allowing concurrent ADC sampling, DAC output, and timer-triggered PWM updates without CPU intervention.

Analog subsystem integration includes two OPAMPs configurable as programmable-gain amplifiers (PGA) with accessible terminals, four ultra-fast comparators with internal hysteresis, and dual independent ADCs with selectable resolution (6/8/10/12 bits) and separate analog supply (2.0–3.6 V). The 12-bit DAC supports buffered/unbuffered operation with dedicated analog supply (2.4–3.6 V).

Key Specifications

Pinout & Package

LQFP64 package with exposed thermal pad (EP), 0.5 mm pitch, 10 × 10 mm body size - optimized for thermal dissipation in motor gate-driver co-location and industrial ambient temperatures up to 105°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F302RDT7, STM32F303RCT7 trades FSMC for USB OTG and larger memory, while STM32G431KBT6 delivers higher analog throughput at lower memory capacity - making the RDT7 optimal for space-constrained motor drives needing external memory and balanced analog/digital resources.

Availability

STM32F302RDT7 is available at Aetrix Electronics and suitable for industrial motor control, smart power supplies, medical infusion pumps, and automotive body control modules requiring stable component supply across extended product lifecycles.

Supply support for STM32F302RDT7 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade silicon.

The STM32F3 series targets cost-sensitive, analog-rich embedded applications - specifically engineered to integrate precision analog peripherals (OPAMP, COMP, DAC, ADC) with real-time control capabilities for motor drives, digital power, and industrial automation.

FAQ

What is the maximum operating temperature range for STM32F302RDT7?

The STM32F302RDT7 is rated for industrial temperature range: –40 °C to +105 °C. This is confirmed in Section 6.3.1 of the datasheet (DocID026900 Rev 4, page 68), where ambient operating temperature (TA) is specified as –40 to 105 °C under normal VDD conditions. Thermal derating applies above 85 °C for sustained 72 MHz operation.

Does STM32F302RDT7 support hardware CRC calculation?

Yes, STM32F302RDT7 includes a dedicated CRC calculation unit compliant with IEEE 32-bit CRC standard. It operates independently of the CPU, supports programmable polynomial (default 0x04C11DB7), and can compute CRC over memory blocks or data streams - used for firmware integrity checks and secure boot verification per Section 3.6 of the datasheet.

How many I²C interfaces does STM32F302RDT7 have, and what are their speed modes?

STM32F302RDT7 integrates three I²C interfaces supporting Fast-mode Plus (1 Mbit/s), SMBus/PMBus, and wakeup from Stop mode. Each includes digital/analogue noise filters and supports 7-bit/10-bit addressing. Electrical specs confirm 20 mA current sink capability on SDA/SCL lines - enabling robust communication in electrically noisy motor drive environments.

Can the operational amplifiers in STM32F302RDT7 be used in transimpedance configuration?

Yes - both OPAMPs provide full terminal access (VINP, VINN, VOUT), allowing transimpedance amplifier (TIA) implementation with external feedback resistor. The datasheet (Section 3.16, page 24) confirms rail-to-rail input/output swing and 10 MHz gain-bandwidth product, supporting photodiode current-to-voltage conversion up to ~100 kHz bandwidth with appropriate resistor/capacitor selection.