TLC32071

The TLC32071 is an analog interface integrated circuit that converts between the analog and digital domains. The device includes an 8-bit voltage-output digital-to-analog converter (DAC), an 8-bit analog-to-digital converter (ADC), an analog input multiplexer with eight analog inputs, an output reference MUX, and a high-speed 8-bit bidirectional data bus that interfaces directly to the TMS320 family of digital signal processors. The reset input (RESET) of TLC32071 is used to clear the DAC and control registers. The 8-bit DAC converts digital signals to the equivalent analog values. The DAC TLC32071 is followed by a level shifter, which adjusts the center of the DAC output range to the voltage externally applied to the ANLG COM input. One of three output ranges can be selected by an internal register.

The 8-bit ADC TLC32071 converts any one of eight analog inputs selected by a programmable internal register through an input multiplexer. Six of TLC32071 have inverting inputs with built-in level shifting so that these six output ranges are centered at the ADC input voltage midpoint. Two of the six inputs have register selectable gains. The first conversion result after selection of one of the six inverting inputs should be discarded as invalid. The two remaining inputs are direct inputs to the ADC multiplexer with output ranges centered at the internal 2.5-V reference (Vref). After reset, this reference of TLC32071  is available at the REF output. The REF output can also be programmed by an internal control register to provide access to other internal references, any of the analog inputs after scaling and shifting, or the unscaled output of the DAC.