DESCRIPTION

· The ADuC834 is a smart transducer front end integrating two high-resolution ADCs, an 8-bit MCU, and Flash/EE memory.

· It features a primary 24-bit ADC and an auxiliary 16-bit ADC with a temperature sensor and PGA.

· The device operates from a 32 kHz crystal with an on-chip PLL generating a 12.58 MHz clock.

· It includes 62 KB Flash/EE program memory, 4 KB Flash/EE data memory, and 2304 bytes of RAM.

· The microcontroller core is 8051-compatible with 12 core clock periods per machine cycle.

FEATURES

· High-resolution ADCs: 24-bit primary ADC and 16-bit auxiliary ADC.

· Memory: 62 KB Flash/EE program memory, 4 KB Flash/EE data memory, 2304 bytes RAM.

· On-chip peripherals: 12-bit DAC, dual 16-bit DACs/PWMs, temperature sensor, dual excitation current sources.

· Serial I/O: UART, SPI, and I2C interfaces.

· Power: 2.3 mA max at 3.6 V, 20 µA max in power-down mode.

APPLICATIONS

· Intelligent sensors and weigh scales.

· Portable instrumentation and battery-powered systems.

· 4–20 mA transmitters and data logging.

· Precision system monitoring.