TLC2543IN

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The TLC2543IN is an analog-to-digital converter from Texas Instruments. It is a 12-bit successive approximation register ADC (SAR ADC) with a sample rate of up to 9.5 MHz. The device features a wide operating range from 2.3V to 5.5V and accepts both unipolar and bipolar input ranges with a maximum VREF of 2.4V. It offers 200 µA typical current consumption and the flexibility of an entirely asynchronous power-up and power-down sequencing.

This device is typically used in data acquisition and medical applications due to its low noise and power consumption, high accuracy and fast conversion rate. The core of the converter is an open loop capacitive DAC array that is composed of twelve segments, each segment representing a different sub range. A comparator is used to compare the output of the DAC to the input voltage.

The TLC2543IN has a flexible data interface, allowing both 8/10/12-bit digital serial output and parallel output. In serial mode, data is either sent through an SPI interface or via a three-wire synchronous serial port. It also features a selectable strobe, an additional synchronous strobe control to generate a strobe pulse that can be used for synchronous communication.

The TLC2543IN has a unique auto-discontinuous sampling mode that can significantly reduce conversion time, increase resolution and reduce power consumption. In this mode, multiple samples are taken and then data is aligned to produce a single output. This can also be used in thermal-cycling applications where the noise of the device is almost entirely avoided.

In terms of accuracy, the TLC2543IN supports ± 0.5LSB accuracy over a wide temperature range, with no calibration. It also offers automatic which can be used to reduce and maintain offset and gain errors over temperature. The device is programmed through a single control register, which is easy to program and has low overhead.

The TLC2543IN is a powerful and high performance solution for a range of data acquisition and medical applications requiring accurate, low-noise and low-power analog-to-digital conversion. It offers flexible data interface and a wide operating range, as well as load detecting and auto-discontinuous sampling modes. With its high accuracy and low calibration, the device provides an ideal solution for applications requiring precision measurements.

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