TLC3548IDW

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The TLC3548IDW is a cost-effective, integrated analog-to-digital converter (ADC) with an 8-bit resolution, designed for data acquisition applications. It is a low-power device, making it ideal for battery-operated mobile systems. With its low external component count, fast conversion time, and integration of transient voltage suppressor on its input pins, the TLC3548IDW is an excellent choice for applications including automotive, medical, industrial and consumer applications.

In applications such as temperature measurement, the TLC3548IDW has a direct interface with a temperature sensor, with a programmable high-pass filter set to the temperature sensor’s zero-crossing frequency. This feature eliminates the need for external zero-crossing detection circuitry. The converter offers programmable input range(VREF) and input ranges that are adjustable in one-tenth increments. A wide supply range from 2.7 to 5.25V simplifies the design process.

The TLC3548IDW consists of an 8-bit successive-approximation analog-to-digital converter, a low-dropout voltage regulator, an 8-bit digital signal processor, and a 4MHz oscillator. The 10-pin package is available in an SOIC-10 or TSSOP-10.

The TLC3548IDW has an input signal range of ±VREF,where VREF is adjustable between 0.250V and 3.000V in 0.025V steps of resolution. The converter has a conversion rate of 400kSPS maximum and operates with a supply voltage of 2.7-5.25V. The low dropout voltage regulator, which also provides a reference voltage to the converter, features an adjustable accuracy of ±1%.

The TLC3548IDW is capable of converting its input signals in both single-ended and differential modes, providing a maximum eight-bit resolution on both modes. The single-ended mode allows the converter to measure a single-ended input signal, while the differential mode allows for differential input signals to be converted. Both modes provide a sample rate of 400kSPS, with a minimum clock period of 250ns.

The TLC3548IDW has a two-channel Gain Set, enabling both DC and AC gain settings to be made. The AC gain settings allow signals with wide dynamic range to be converted into 8-bit numbers with minimum distortion. This makes the ADC especially suitable for voltage-to-resolution conversion and sample-and-hold applications.

The TLC3548IDW features an integrated low-dropout voltage regulator with an adjustable range of 8V to 10V. The voltage regulator supports an adjustable accuracy of ±1%. This voltage regulator supplies the reference voltage to the ADC and allows the reference voltage to be trimmed, thus allowing the ADC to be calibrated to improve its linearity and accuracy performance.

The TLC3548IDW also has an integrated digital signal processor (DSP), which processes the data from the ADC for further signal processing by a microcontroller. This DSP contains a 12-bit data buffer and a 16-bit frequency accumulator. It functions as an arithmetic logic unit, enabling the ADC to perform basic math operations in the analog domain. Additionally, the DSP can store data in RAM and access stored data through its 10-bit address generation.

In summary, the TLC3548IDW is a cost-effective, integrated analog-to-digital converter with an 8-bit resolution that is designed for data acquisition applications. Its low-power design, low component count, adjustable input range, fast conversion time and integrated transient voltage suppressor make it an ideal choice for automotive, medical, industrial, and consumer applications. Its integrated low-dropout voltage regulator and digital signal processor enable the ADC to provide greater accuracy, linearity and signal processing capability in a wide range of applications.

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