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MicroSystem Controllers - Precision ADCs with 8051 Microcontroller and Flash Memory

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The MicroSystem Controller product line is a completely integrated family of mixed-signal devices. The family offerings include an 8051 CPU which incorporates a high-resolution delta-sigma ADC, high-resolution DAC, 8-channel multiplexer, burn-out detect, selectable buffered input, offset DAC (Digital-to-Analog Converter), Programmable Gain Amplifier (PGA), temperature sensor, precision voltage reference, Flash Program Memory, Flash Data Memory, and Data SRAM. Devices within the product family are pin compatible, which greatly simplifies device migration.

On-chip peripherals include an additional 32-bit accumulator, an SPI compatible serial port with FIFO, Multi-Master I2C, dual UARTs, multiple digital input/output ports, watchdog timer, low-voltage detect, on-chip power-on reset, 16-bit PWM, breakpoints, brownout reset, and three timer/counters.

The devices accepts low-level differential or single-ended signals directly from a transducer. The ADC provides 24 bits of resolution and 24 bits of no-missing-code performance using a sinc3 filter with a programmable sample rate. The ADC also has a selectable filter that allows for high-resolution single-cycle conversion. The microcontroller core is fully 8051 instruction set compatible. The microcontroller core is an optimized 8051 core which executes up to three times faster than the standard 8051 core, given the same clock source. That makes it possible to run the device at a lower external clock frequency and achieve the same performance at lower power than the standard 8051 core.

The product family allows the user to uniquely configure the Flash and SRAM memory maps to meet the needs of their application. The Flash is programmable down to 2.7V using both serial and parallel programming methods. The Flash endurance is 100k Erase/Write cycles. In addition, 1,280 bytes of RAM are incorporated on-chip.

The part has separate analog and digital supplies, which can be independently powered from 2.7V to +5.5V. At +3V operation, the power dissipation for the part is typically less than 4mW. The product family is packaged in a TQFP-64 package.

The product family is designed for high-resolution measurement applications in smart transmitters, industrial process control, weigh scales, chromatography, and portable instrumentation.