ADuC834 is a microcontroller from Analog Devices that integrates two high-resolution Sigma-Delta ADCs with 16-bit and 24-bit resolution, respectively. ADuC834 also integrates 62KB of flash memory and 4KB of data storage.
The ADuC834 is a complete smart transducer front-end integrating two high-resolution sigma-delta ADCs, an 8-bit MCU, and program/data Flash/EE Memory on a single chip. The device operates from a 32 kHz crystal with an on-chip PLL generating a high-frequency clock of 12.58 MHz. The microcontroller core is an 8052 and therefore 8051 instruction set compatible with 12 core clock periods per machine cycle.
The part operates from a 3V or 5V supply. When operating from 3V the power dissipation for the part is below 10mW. The ADuC834 is housed in a 52-lead MQFP package. It includes 62Kbytes of nonvolatile Flash/EE program memory, 4 Kbytes of nonvolatile Flash/EE data memory, and 256 bytes of user RAM.
| ADC Conversion Rate | 5.4 Hz min to 105 Hz max |
|---|---|
| Primary ADC Resolution | 24 Bits min |
| Primary ADC Resolution (20 mV Range) | 13 Bits p-p typ |
| Primary ADC Resolution (2.56 V Range) | 18 Bits p-p typ |
| Auxiliary ADC Resolution | 16 Bits min |
| Auxiliary ADC Resolution (2.5 V Range) | 16 Bits p-p typ |
| DAC Resolution | 12 Bits |
| Power Supply | 3 V and 5 V Operation |
| Power Dissipation (3V) | Below 10mW |
| Package | 52-lead MQFP |
| Program Memory | 62 Kbytes |
| Data Memory | 4 Kbytes |
| User RAM | 256 Bytes |
| Extended RAM | 2 KBytes |
| Core Clock Frequency | 12.58 MHz Max |
The device operates from a 3V or 5V supply.
When operating from 3V, the power dissipation is below 10mW.
The ADuC834 is housed in a 52-lead MQFP package.
The maximum core clock frequency is 12.58 MHz.