Datasheet

ADuCM360/ADuCM361 Data Sheet
Rev. B | Page 4 of 24
FUNCTIONAL BLOCK DIAGRAMS
Σ-∆
MODULATOR
24-BIT
Σ-∆ ADC
V
REF
AIN0
DAC, TEMP,
IOVDD/4,
AVDD/4
SINC3/4
FILTER
12-BIT
DAC
SINC2
FILTER
ON-CHIP
1.8V ANALOG
LDO
ON-CHIP
1.8V DIGITAL
LDO
POWER-ON
RESET
ON-CHIP
OSCILLATOR
(1% TYP)
16MHz
GPIO PORTS
UART PORTS
2 × SPI PORTS
I
2
C PORTS
19 GENERAL-
PURPOSE
I/O PORTS
MEMORY
128kB FLASH
8kB SRAM
DMA AND
INTERRUPT
CONTROLLER
TIMER0
TIMER1
WATCHDOG
WAKE-UP TIMER
PWM
SERIAL WIRE
DEBUG,
PROGRAMMING
AND DEBUG
ARM
CORTEX-M3
PROCESSOR
16MHz
V
BIAS
GENERATOR
PRECISION
REFERENCE
ADuCM360
BUFFER
BUFFER
BUFFER
SELECTABLE
V
REF
SOURCES
CURRENT
SOURCES
AIN1
AIN2
DAC RESET
XTALO
XTALI
SWDIO
SWCLK
DVDD_REG
AVDD_REG
AVDD
AGND
AIN3
AIN4/IEXC
AIN5/IEXC
AIN6/IEXC
AIN7/VBIAS0/IEXC/
EXTREF2IN+
AIN8/EXTREF2IN–
AIN9/DACBUFF+
AIN10
AIN11/VBIAS1
IREF
GND_SW VREF– INT_REF IOVDD IOVDDVREF+
09743-001
AMP
MOD2
GAIN
Σ-∆
MODULATOR
24-BIT
Σ-∆ ADC
V
REF
SINC3/4
FILTER
AMP
MOD2
GAIN
BUF
BUF
MUX
Figure 1. ADuCM360 Functional Block Diagram