Open platform, 32-channel, portable, data-logger with 32 pga control lines for wearable medical device development

摘要: A compact isolated low-power 32-channel 16-bit data-logging system around an NXP ARM processor (LPC1768) and four of the linear technology octal analogue-to-digital converters (ADCs) LTC1857/58/59 is designed. The requires only 250 mA when powered at 5 V to run full power (including a capacitive 2.8 inch touch-screen display 32 Gb SHDC SD memory card). sample rate configurable up 1 k SPS per channel as well voltage dynamic input ±10 V; additionally, chip select lines (SPI protocol) individually addressable controllable while sampling configure user-designed programmable gain amplifiers (PGAs) are available. Collaboration being sought improve software capabilities, particularly enrich very basic user interface add wireless connectivity. code available (under GPL licence) our repository, gerber file reproduce PCB (on As-Is basis) on request. galvanic isolation between supply data connection ADC channels makes data-logger also compatible with main PCs, hence it suitable for implementation medical devices least prototyping initial testing stages.