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Holtek has launched the HT66F2742, a new ATS 24-bit A/D Flash MCU. The most important feature of this microcontroller is its integrated accurate temperature sensor (ATS) to compensate errors, e.g. during the conversion of the high-resolution integrated ADC.

The temperature sensor achieves a factory accuracy of

  • ±0,1°C bei 32°C ~ 42°C
  • ±0,2°C bei 20°C ~ 60°C.

This makes this new device suitable for use in infrared temperature measurements, such as body temperature measurements (forehead thermometers, ear thermometers, electronic thermometers, body temperature patches) and high-precision applications for measuring ambient temperature (e.g. for monitoring cold chains).

By integrating the precise temperature sensor, a 24-bit A/D converter, an OPA and a LDO, huge savings can be made in the number of external components, resulting in a smaller product size and lower production costs, as well as simplifying component procurement for the overall product.

The BH66F2742 core features:

  • 8-Bit RISC Core @ 8MHz
  • Flash Program Memory: 4K×16
  • Data Memory: 256×8
  • True EEPROM Memory: 32×8
  • Watchdog Timer function
  • 4 bidirectional I/O lines
  • Single external interrupt line shared with I/O pin
  • Single Timer Module for time measurement, compare match output or PWM output function
  • Multi-mode operation: FAST (8MHz), SLOW(32kHz), IDLE and SLEEP
  • Power down and wake-up functions to reduce power consumption
  • Universal Serial Interface Module – USIM for SPI, I2C or UART communication
  • Dual Time-Base functions for generation of fixed time interrupt signals
  • 1 differential or 2 single-end channel 24-bit resolution Delta Sigma A/D converter with Accurate Temperature Sensor
  • Low voltage reset function
  • Package types: 16-pin SSOP, 24-pin QFN

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