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