FEATURES
► Analog input/output
► 16-bit, 400 kSPS ADC
► Voltage, current, and impedance measurement capability
► Internal and external current and voltage channels
► Ultralow leakage switch matrix and input mux
► Input buffers, PGA
► Voltage DACs
► Two dual output voltage DACs
► Output range: 0.2 V to 2.4 V (±2.2 V voltage potential to
sensor) for 12-bit outputs
► Two bias potentiostat and TIA amplifiers
► Ultralow power, 1 μA per amplifier
► One high speed 12-bit voltage DAC
► Output range to sensor: −607 mV to +607 mV
► High speed TIA for impedance measurements
► Programmable gain amplifier on output
► Amplifiers, accelerators, and references
► Two low power, low noise amplifiers
► Suitable for potentiostat bias in electrochemical sensing
► Two low power, low noise TIAs
► Suitable for measuring sensor current output in the
±0.00005 μA to ±3000 μA range
► Programmable load and gain resistors
► Analog hardware accelerators
► Digital waveform generator (refer to the ADuCM356 Hardware
Reference Manual)
► DFT and digital filters
► 2.5 V and 1.82 V on-chip, precision voltage references
► Internal temperature sensor, ±2°C accurate
► Impedance measurement range of <1 Ω to 10 MΩ, 0.016 Hz
to 200,000 Hz
► Voltammetry scan rate up to 2000 steps per second

SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM
► Microcontroller
► 26 MHz Arm Cortex-M3 processor
► Serial wire port supports code download and debugging
► 256 kB flash/64 kB of SRAM
► Security and safety
► Hardware cyclic redundancy check (CRC) with programmable
polynomial generator (refer to the ADuCM356 Hardware Reference
Manual)
► Read and write protection of user flash
► On-chip peripherals
► UART, I2C, and SPI serial input/output
► Up to 17 GPIO pins
► External interrupt option
► General-purpose, wake-up, and watchdog timers
► Power
► 2.8 V to 3.6 V supply and active measurement range
► Power supply monitor
► Active current consumption: 30 μA/MHz for digital section
► Hibernate with bias to external sensor: 8.5 μA
► Shutdown mode with no SRAM retention: 2 μA
► Package and temperature range
► 6 mm × 5 mm, 72-lead LGA package
► Fully specified for −40°C to +85°C ambient operation

APPLICATIONS
► Gas detection
► Food quality
► Environmental sensing (air, water, and soil)
► Blood glucose meters
► Life sciences and biosensing analysis
► Bioimpedance measurements
► General amperometry, voltammetry, and impedance spectroscopy functions