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