16-Bit Precision, Low Power Meter On A
Chip with Cortex-M3 and Connectivity
ADuCM350
Data Sheet
Integrated full-speed USB 2.0 controller and PHY
Multilayer advanced microcontroller bus architecture
(AMBA) bus matrix
Central direct memory access (DMA) controller
Real-time clock (RTC)
General-purpose, wake-up, and watchdog timers
Communication
Input/output
I2S and beeper interface
FEATURES
Analog performance
160 kSPS, 16-bit, precision analog-to-digital converter (ADC)
4 dedicated voltage measurement channels
8 current measurement channels
Impedance measurement engine
High precision voltage reference
Supply noise rejection filtering
Ultralow leakage configurable switch matrix
12-bit digital-to-analog converter (DAC)
Precision instrumentation amplifier control loop
6-channel CapTouch controller
LCD display controller (parallel and serial)
LCD segment controller
SPI, I2C, and UART peripheral interfaces
Programmable GPIOs
Temperature sensor
Analog hardware accelerators
Power
Coin cell battery compatible
Autonomous analog front-end (AFE) controller
Independent sequencer for AFE functions
Direct digital synthesizer (DDS)/arbitrary waveform
generator
2.5 V to 3.6 V active measurement range
Power management unit (PMU)
Power-on reset (POR) and power supply monitor (PSM)
Packages and temperature range
Operating temperature range: −40°C to +85°C
Package: 120-lead, 8 mm × 8 mm CSP_BGA
Receive filters
Complex impedance measurement (DFT) engine
Processing
16 MHz ARM Cortex-M3 processor
384 kB of embedded flash memory
32 kB system SRAM
APPLICATIONS
Point-of-care diagnostics
Body-worn devices for monitoring vital signs
Amperometric, voltametric, and impedometric measurements
16 kB Flash configured EEPROM
FUNCTIONAL BLOCK DIAGRAM
PLL
SW/JTAG
1 × 256kB
1 × 128kB
LF XTAL
HF XTAL
ARM
CORTEX-M3
FLASH
HF OSC
LF OSC
16kB
EEPROM
NVIC TRACE
DMA
SRAM0
(16kB)
AFE
SIGNAL
AMBA
● 16-BIT PRECISION ADC
● PRECISION REFERENCE
● SWITCH MATRIX
● 12-BIT DAC
GENERATION
AFE
CONTROLLER
BUS
MATRIX
SRAM1
POR
DFT
(16kB)
● IN-AMP CONTROL LOOP
● TIA
USB PHY
USB
PSM
RECEIVE
FILTERS
PDI
LP LDO
CapTouch
HP LDO
PMU
SPIH
TMR0
2
UART
SPI0
ABP‐0
LCD
SPI1
I C
TMR1
BEEP
MISC
AHB
‐
APB
ABP‐1
WDT
BRIDGE
2
I S
GPIO
CRC
TMR2
RTC
Figure 1.
Rev. B
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