Signal Processing Group Inc, has released an interesting device ( silicon proven and volume production proven ) for use as a mixed signal controller device. At its input is a two/three wire interface ( a clock, data and latching pins) which is used to communicate with a micro-controller and memory of the users choice. The protocol is much like a I2C protocol. The inputs are digital words which drive currents multiplexed into a set of six outputs. These outputs can be used to drive LEDs ( 50 mA each) or other transducers such as pressure sensors, motors, etc . A feedback TIA ( trans-impedance amplifier) is used to capture an analog feedback signal. This feedback signal is converted to a 10 bit digital word ( conversion time is approximately 100us) and sent via the serial interface to a micro-controller for processing. Looking at these functional blocks it appears that the device would be well suited for feedback control of various micro-systems including automatic lighting control, toys, sensor interface, etc. For further information and a detailed datasheet please go to the SPG website at http://www.signalpro.biz and use the link to proven IP.