Datasheet ADUCM355 (Analog Devices)

Precision Analog Microcontroller with Chemical Sensor Interface Data Sheet ADuCM355 FEATURES Security and safety Analog input/output Hardware cyclic redundancy check (CRC) with 16-bit, 400 kSPS ADC programmable polynomial generator (refer to the Voltage, current, and impedance measurement capability ADuCM355 Hardware Reference Manual) Internal and external current and voltage channels Read and write protection of user flash Ultralow leakage switch matrix and input mux On-chip peripherals Input buffers, PGA UART, I2C, and SPI serial input/output Voltage DACs Up to 17 GPIO pins Two dual output voltage DACs External interrupt option Output range: 0.2 V to 2.4 V (±2.2 V voltage potential to General-purpose, wake-up, and watchdog timers sensor) for 12-bit outputs Power Two bias potentiostat and TIA amplifiers 2.8 V to 3.6 V supply and active measurement range Ultralow power, 1 μA per amplifier Power supply monitor One high speed 12-bit voltage DAC Active current consumption: 30 μA/MHz for digital section Output range to sensor: −607 mV to +607 mV Hibernate with bias to external sensor: 8.5 μA High speed TIA for impedance measurements Shutdown mode with no SRAM retention: 2 μA Programmable gain amplifier on output Package and temperature range Amplifiers, accelerators, and references 6 mm × 5 mm, 72-lead LGA package Two low power, low noise amplifiers Fully specified for −40°C to +85°C ambient operation Suitable for potentiostat bias in electrochemical sensing APPLICATIONS Two low power, low noise TIAs Gas detection Suitable for measuring sensor current output in the Food quality ±0.00005 μA to ±3000 μA range Environmental sensing (air, water, and soil) Programmable load and gain resistors Blood glucose meters Analog hardware accelerators Life sciences and biosensing analysis Digital waveform generator (refer to the ADuCM355 Bioimpedance measurements Hardware Reference Manual) General amperometry, voltammetry, and impedance DFT and digital filters spectroscopy functions 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, SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM 0.016 Hz to 200,000 Hz OSCILLATORS Voltammetry scan rate up to 2000 steps per second POTENTIOSTAT 0: AMPLIFIERS AND DAC Microcontroller ARM TIMERS: Cortex-M3 WATCHDOG, 26 MHz Arm Cortex-M3 processor CURRENT WAKE-UP, CHANNELS GENERAL- SRAM Serial wire port supports code download and debugging 16-BIT ADC PURPOSE FLASH MEMORY VOLTAGE 128 kB flash/64 kB of SRAM CHANNELS LDOs PORs GPIOs INTERNAL WITH CHANNELS EXTERNAL VOLTAGE INTERRUPTS SWD TEMPERATURE REFERENCES CHANNELS
1 00
POTENTIOSTAT 1: IMPEDANCE ENGINE
4-
AMPLIFIERS AND DAC AMPLIFIERS AND DAC
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Figure 1.
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Document Outline FEATURES APPLICATIONS SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION SPECIFICATIONS MICROCONTROLLER ELECTRICAL SPECIFICATIONS RMS NOISE RESOLUTION OF ADC TIMING SPECIFICATIONS Timing Diagrams ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS INFORMATION RECOMMENDED CIRCUIT AND COMPONENT VALUES OUTLINE DIMENSIONS ORDERING GUIDE