ADT70 internal functional block diagram
The ADI I70 integrated circuit is specifically engineered for precision temperature measurement using resistance temperature detectors (RTDs) and platinum resistance temperature detectors (PRTDs). It effectively operates with standard 1KΩ and 100Ω platinum RTDs, making it versatile for various temperature sensing applications in industrial and laboratory settings.
The internal architecture of the ADT70 includes a high-performance instrumentation amplifier that enhances the weak signals from the RTDs, ensuring accurate and stable readings. The operational amplifier within the circuit is utilized for further signal conditioning, allowing for amplification and filtering of the output signal to improve the overall signal-to-noise ratio.
A crucial feature of the ADT70 is its 2.5V reference power supply, which provides a stable voltage reference essential for accurate analog-to-digital conversion in temperature measurement systems. The integrated matching current source is designed to provide a constant current through the RTD, ensuring linearity and precision in the temperature readings.
The internal functional block diagram of the ADT70 illustrates the interconnections and operational flow between the various components, including the input stage, amplification stage, and output stage, which collectively contribute to the circuit's performance. This design minimizes external component requirements, simplifying the overall circuit layout and enhancing reliability.
In summary, the ADI I70 is a sophisticated signal conditioning IC that offers an efficient solution for temperature measurement using RTDs and PRTDs, with integrated components that facilitate ease of use, high accuracy, and minimal external circuitry.AD, I70 is a signal conditioning integrated circuit RTD/PRTD design, it is very suitable 1K, lOOfl platinum RTD (PRTD). ADT70 internal integration of the instrumentation amplif ier, an operational amplifier, 2 + 5V reference power supply, matching current source isoelectric road, its internal functional block diagram in Fig.
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