ADuC844 is a MicroConverter with dual 16-bit/24-bit ADCs and embedded 62kB FLASH MCU from Analog Devices.
The ADuC844 is a complete smart transducer front-end integrating two high-resolution sigma-delta ADCs, an 8-bit MCU, and nonvolatile Flash/EE memory on a single chip. It is designed for intelligent sensors, weigh scales, and portable instrumentation applications.
The device includes a primary 24-bit ADC and an auxiliary 16-bit ADC, both featuring on-chip digital filtering and programmable output data rates. It operates from a 32 kHz crystal with an on-chip PLL generating a high-frequency clock, and supports 3V and 5V operation in 52-lead MQFP or 56-lead CSP packages.
| On-Chip Flash Program Memory | 62 Kbytes |
|---|---|
| On-Chip Flash Data Memory | 4 Kbytes |
| On-Chip Data RAM | 2304 Bytes |
| MCU Core | 8051-Based |
| Operating Voltage | 3 V and 5 V |
| Operating Temperature Range | -40°C to +125°C |
The on-chip programmable PLL generates a maximum clock frequency of 12.58 MHz.
Yes, it supports in-circuit serial download and debug modes via UART without external hardware.
Power Normal is 2.3mA Max @ 3.6 V, and Power-Down is 20 µA Max with Wakeup Timer.