● High resolution Σ-Δ ADCs
● 2 independent 24-bit ADCs on the ADuC845
● Single 24-bit ADC on the ADuC847 and
● single 16-bit ADC on the ADuC848
● Up to 10 ADC input channels on all parts
● 24-bit no missing codes
● 22-bit rms (19.5 bit p-p) effective resolution
● Offset drift 10 nV/°C, gain drift 0.5 ppm/°C chop enabled
● Memory
● 62-kbyte on-chip Flash/EE program memory
● 4-kbyte on-chip Flash/EE data memory
● Flash/EE, 100-year retention, 100 kcycle endurance
● 3 levels of Flash/EE program memory security
● In-circuit serial download (no external hardware)
● High speed user download (5 sec)
● 2304 bytes on-chip data RAM
● 8051-based core
● 8051-compatible instruction set
● High performance single-cycle core
● 32 kHz external crystal
● On-chip programmable PLL (12.58 MHz max)
● 3 × 16-bit timer/counter
● 24 programmable I/O lines, plus 8 analog or
● digital input lines
● 11 interrupt sources, two priority levels
● Dual data pointer, extended 11-bit stack pointer
● On-chip peripherals
● Internal power-on reset circuit
● 12-bit voltage output DAC
● Dual 16-bit Σ-Δ DACs
● On-chip temperature sensor (ADuC845 only)
● Dual excitation current sources (200 µA)
● Time interval counter (wake-up/RTC timer)
● UART, SPI®, and I2C® serial I/O
● High speed dedicated baud rate generator (incl. 115,200)
● Watchdog timer (WDT)
● Power supply monitor (PSM)
● Power
● Normal: 4.8 mA max @ 3.6 V (core CLK = 1.57 MHz)
● Power-down: 20 µA max with wake-up timer running
● Specified for 3 V and 5 V operation
● Package and temperature range:
● 52-lead MQFP (14 mm × 14 mm),-40°C to +125°C
● 56-lead LFCSP (8 mm × 8 mm),-40°C to +85°C
