This document describes the features and characteristics of MicroConverter® Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU ADuC845/ADuC847/ADuC848. The product features high-resolution Σ-∆ ADCs, embedded 62 kB Flash and single-cycle MCU, and high performance and stability.
The ADuC845, ADuC847, and ADuC848 are MicroConverter® devices that combine high‑resolution ADCs with an 8051‑compatible MCU, on‑chip flash, and a range of peripherals. This handbook describes their architecture, pin functions, memory organization, and key performance characteristics.
The document includes detailed specifications, pin configuration tables, functional block diagrams, power‑supply requirements, calibration procedures, and startup timing. It also covers ADC operation modes, DAC specifications, excitation current sources, and peripheral interfaces such as UART, SPI, and I²C.
| Primary ADC conversion rate (chop on) | 54–105 Hz |
|---|---|
| Primary ADC conversion rate (chop off) | 16.06–1365 Hz |
| No missing codes | 24 bits |
| Offset error drift vs. temperature (chop on) | +10 nV/°C |
| Normal‑mode power consumption | 4.8 mA max @ 3.6 V (core CLK = 1.57 MHz) |
| On‑chip Flash program memory | 62 kB |
| On‑chip Flash data memory | 4 kB |
The default core speed is 1.57 MHz (CD = 3).
All parts provide up to 10 ADC input channels.
The devices are specified for both 3 V and 5 V operation.
Each device includes 62 kB of on‑chip Flash/EE program memory and 4 kB of data memory.