Infineon Technologies SP4001111XTMA1

Overview

SP4001111XTMA1 from Infineon Technologies is an automotive-grade, fully integrated Tire Pressure Monitoring Sensor (TPMS) IC combining MEMS pressure sensing (0–140 kPa absolute), z-axis accelerometer (±2 g), temperature sensor (−40°C to +125°C), 8051 microcontroller (14 KB Flash), RF transmitter (315/433 MHz FSK/ASK), and LF receiver in a single PG-DSOSP-14 package. It enables complete in-tire sensor modules with minimal external components.

For engineers reviewing the SP4001111XTMA1 datasheet, SP4001111XTMA1 pinout, SP4001111XTMA1 application, or SP4001111XTMA1 equivalent, this device supports tire localization via angular position determination, motion-triggered wake-up, battery voltage monitoring, and programmable transmission timing for OEM TPMS compliance.

Technical Context

The SP4001111XTMA1 integrates a glass-silicon-glass MEMS pressure sensor with factory calibration, a 12-bit ADC for pressure/temperature/acceleration digitization, and a fractional-N sigma-delta PLL for precise RF carrier synthesis. Its system controller manages multi-sensor sampling sequences and state transitions between deep sleep (0.5 µA), measurement, and RF transmit modes.

Wake-up is supported by LF carrier detection (125 kHz), motion-triggered acceleration thresholding, interval timers, and GPIO events. The RF path includes Gaussian filtering, ASK ramping, Manchester encoding, and programmable output power up to +13 dBm - all controlled via on-chip registers without external RF tuning.

Key Specifications

Pinout & Package

SP4001111XTMA1 is housed in a 14-pin PG-DSOSP (Plastic Dual Small Outline Square Package) with exposed thermal pad, optimized for high-reliability in-tire mounting and reflow soldering. Package dimensions: 5.0 mm × 5.0 mm × 1.0 mm, pitch 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SP4001111XTMA1, SLF32000 offers lower integration but broader automotive qualification history, while SMT300-204 provides raw sensor flexibility at the cost of doubling design effort and failing to deliver APS or autonomous wake-up - making SP4001111XTMA1 the sole choice for production-ready, localized TPMS modules.

Availability

SP4001111XTMA1 is available at Aetrix Electronics and suitable for direct-mount TPMS sensors, OEM wheel assembly integration, and aftermarket valve-based modules requiring stable component supply across automotive production lifecycles.

Supply support for SP4001111XTMA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and sensor solutions, with global R&D and wafer fabrication facilities.

SP4001111XTMA1 belongs to the SP40PLUS family - a purpose-built TPMS sensor platform designed to consolidate pressure, motion, temperature, battery, and RF functions into a single AEC-Q100 qualified die for zero-calibration, in-tire deployment.

FAQ

What is the maximum RF output power of SP4001111XTMA1 and how is it configured?

The SP4001111XTMA1 delivers up to +13 dBm RF output power in ASK mode and +10 dBm in FSK mode, configurable via the TX_POWER register (address 0x2E). Power level is set in 1 dB steps from −10 dBm to +13 dBm; actual output depends on matching network efficiency and battery voltage - verified per EN 300 220-1 for 433 MHz band compliance.

Does SP4001111XTMA1 support both 315 MHz and 433 MHz operation in the same firmware build?

Yes - RF frequency is selected dynamically at runtime via the RF_FREQ_SEL bit (register 0x2D, bit 7); setting it to '0' configures 315 MHz, '1' selects 433.92 MHz. Both bands share identical modulation schemes, timing, and register maps, enabling single-firmware global deployment with region-specific configuration.

How does the APS (Angular Position Sensing) feature determine wheel location without external magnets or encoders?

APS calculates angular position by measuring the phase shift between the z-axis acceleration waveform (peaking at top-dead-center of wheel rotation) and the RF transmission timestamp. Using internal 32.768 kHz RTC and motion-triggered sampling, it resolves position to ±15° accuracy - sufficient to distinguish front/rear and left/right axles without added hardware.

What is the recommended PCB layout practice for the EPAD thermal pad on SP4001111XTMA1?

The EPAD must be soldered to a solid 12 mm² copper thermal pad on the PCB's inner layer, connected via ≥6 thermal vias (0.3 mm diameter, filled with solder) to internal ground planes. No silkscreen or solder mask should cover the EPAD footprint - IPC-7351B DSOSP-14 land pattern must be strictly followed to ensure mechanical reliability under 100g vibration and thermal cycling.