资 源 简 介
The TC3405 is a low cost, low power analog-to-digitalconverter based on Microchip’s Sigma-Delta technology.It will perform 16-bit conversions (15-bit plus sign)at up to eight per second. The TC3405 is opTImized foruse as a microcontroller peripheral in low cost, batteryoperated systems. A voltage reference is included, oran external reference can be used. A VDD monitor witha reset generator provides Power-on Reset and BrownoutprotecTIon while an extra threshold detector is suitablefor use as an early warning power fail detector, oras a Wake-up TImer.The TC3405’s 2-wire microPort™ digital interface isused for starTIng conversions and for reading out thedata. Driving the SCLK line low starts a conversion.After the conversion starts, each additional falling edge(up to six) detected on SCLK for t4 seconds reducesthe A/D resolution by one bit and cuts conversion timein half. After a conversion is completed, clocking theSCLK line puts the MSB through LSB of the resultingdata word onto the SDAT line, much like a shift register.The part automatically sleeps when not performing adata conversion.The TC3405 is available in a 16-Pin PDIP and a 16-Pin QSOP package.
