Analog Devices Inc. ADUCM356 Precision Analog Microcontrollers

Analog Devices Inc. ADUCM356 Precision Analog Microcontrollers feature low-power and have an Arm® Cortex®-M3 processor. The Analog Devices Inc. ADUCM356 controls and measures electrochemical sensors featuring current, voltage, and impedance measurements. The device includes a 16-bit, 400kSPS SAR ADC with input buffers, a built-in antialias filter, and a programmable gain amplifier. It also has three trans-impedance amplifiers for different sensor types and two low-power amplifiers for potentiostat capability. Dual output DACs control the noninverting inputs, and there’s a high-speed DAC and output amplifier for generating an AC signal.

Features

Analog input/output
- 16-bit, 400kSPS 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
- 0.2V to 2.4V (±2.2V voltage potential to the sensor) for a 12-bit output range
- Two bias potentiostat and TIA amplifiers
- Ultralow power, 1μA per amplifier
- One high-speed 12-bit voltage DAC
- −607mV to +607mV output range to sensor
- High-speed TIA for impedance measurements
- Programmable gain amplifier on the 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 ±0.00005μA to ±3000μA range
  - Programmable load and gain resistors
- Analog hardware accelerators
  - Digital waveform generator (refer to the ADuCM356 Hardware Reference Manual)
  - DFT and digital filters
- 2.5V and 1.82V on-chip precision voltage references

Internal temperature sensor, ±2°C accurate
- Impedance measurement range of <1Ω to 10MΩ, 0.016Hz to 200,000Hz
Voltammetry scan rate up to 2000 steps per second
Microcontroller
- 26MHz Arm Cortex-M3 processor
- Serial wire port supports code download and debugging
- 256kB flash/64kB 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
- 2.8V to 3.6V supply and active measurement range
- Power supply monitor
- 30μA/MHz for the digital section active current consumption
- 8.5μA hibernate with a bias to an external sensor
- 2μA shutdown mode with no SRAM retention
Package and temperature range
- 6mm × 5mm, 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

Analog Devices Inc. ADUCM356 Precision Analog Microcontrollers

Features

Applications

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