* Please refer to the English Version as our Official Version.
The TLC3541 and TLC3545 are high performance, 14 bit, low power, micro CMOS adc (adc) series. These devices are powered by a single 5-V power supply. Devices have single, double or single pseudo differential inputs.
All of these devices have a Chip Selection (CS), Serial Clock (SCLK), and Serial Data Output (SDO), providing a direct 3-wire interface to the most popular host microprocessor's serial port (SPI interface). When interacted with the DSP, the frame synchronization signal (FS) is used to indicate the start of a serial data frame on pin 1 (CS) or pin 7 (FS) of the TLC3541.the TLC3545 ADC connects to the DSP only through pin 1 (CS).
Functional block diagram
The TLC3541 and TLC3545 are designed for low power consumption. Power saving features further enhance the automatic power off mode. The product family features high-speed serial connections to modern host processors with external SCLK of up to 15mhz. Both series use a built-in oscillator as the conversion clock, providing a maximum conversion time of 2.67µs.
The TLC3541/5 is a successive approximation (SAR) adc using a charge redistribution DAC. The following figure shows a simplified version of the ADC. The sampling capacitor picks up the signal on the AIN(+) pin of the AIN(or TLC3545) during sampling. When the conversion process begins, the SAR control logic and charge redistribution DAC are used to add and subtract a fixed amount of charge from the sampling capacitor, bringing the comparator into equilibrium. When the comparator is balanced, the conversion is complete and the ADC output code is generated.