Mixed-signal 8052 MCU with on-chip ADC and DAC
The Analog Devices ADUC841BCPZ62-3 is an 8-bit MicroConverter MCU built around an 8052 core running at 8.38 MHz. It packs 62 KB of program Flash, 2.25 K x 8 of RAM, and a full set of mixed-signal peripherals: an 8-channel 12-bit ADC and dual 12-bit DAC. On-chip peripherals include DMA, a programmable PWM, a temperature sensor, and a watchdog timer. Connectivity covers I²C, SPI, and a UART/USART. The part is housed in a 56-lead LFCSP-VQ (8x8 mm) package and operates over the industrial temperature range of -40°C to 85°C on a 2.7 V to 3.6 V supply.
What the 8.38 MHz clock and integrated converters mean for your design
The 8.38 MHz core clock is modest by today's standards, but this part is not a general-purpose number cruncher — it is a mixed-signal controller. The 12-bit ADC samples at rates that match slow-to-moderate sensor signals (temperature, pressure, strain gauges) without needing an external converter. The dual 12-bit DAC gives you two analog output channels for set-point generation or closed-loop trim. The 8052 instruction set is well understood, and the internal oscillator eliminates the external crystal in many applications. If your firmware loop needs to service the ADC, update the DAC, and handle a UART at the same time, the 8.38 MHz clock leaves enough headroom for most industrial control loops.
Lifecycle and sourcing reality
ADI lists the ADUC841BCPZ62-3 as current production — no last-time-buy notice, no NRND flag. That means it is still an active line for new designs and production replenishment. It is ROHS3 compliant. The ADUC842BSZ62-3 shares the same 8.38 MHz speed and 2.7 V supply but in a different package (BSZ suffix). Confirm the package code against your board footprint before substituting.