ADT7461AEBZEVB

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The ADT7461AEBZEVB is an evaluation and demonstration board and kit that utilizes thermistors to measure temperature. These boards are widely used across industries to accurately and efficiently measure temperature in many different scenarios. In this article, we will discuss the application field and working principle of the ADT7461AEBZEVB.

The current temperature sensing solution with the highest accuracy is the NTC Thermistor, or Negative Temperature Coefficient Thermistor. The ADT7461AEBZEVB utilizes NTC thermistors to measure temperature. The board has a small form factor and can be implemented in a wide range of applications, including:

• Medical devices
• Industrial automation systems
• Automotive applications

The ADT7461AEBZEVB is an ideal platform for designers looking to accurately measure temperature in such field applications. The board features a low power consumption and high accuracy analog circuit that enables reliable temperature tracking even in extreme temperatures. In addition, the board is compatible with the latest automotive standard JIS C0936, making it suitable for automotive applications.

The ADT7461AEBZEVB utilizes a bridge circuit technology with thermistors as temperature sensing elements. A thermistor is a temperature-sensitive resistor of semiconductor material. The bridge circuit is designed to measure the complex thermal resistance across the thermistors. The ratio between the two different temperature-variation resistors can be determined by a simple voltage divider circuit where the voltage drop across one of the resistors is proportional to the temperature of the thermistor. This method is called the “bridge” method since it involves a bridge circuit to calculate the chip temperature. The bridge circuit consists of two series connected thermistors and two resistors in each leg. The resistors also act as a temperature compensation to adjust the bridge circuit’s line-to-ground impedance.

The ADT7461AEBZEVB also comes with a Schottky diode as a temperature compensation element. The Schottky diode works by allowing an adjustable current to pass through the diode and this current is scaled to the desired temperature for the thermistor. Schottky diodes are often used for compensating non-linearity commonly present in NTC thermistors.

The ADT7461AEBZEVB has a detection accuracy of ±3.0°C. This accuracy can be adjusted to a higher resolution by reducing the gain and compensating the bridge circuit with an external impedance. Moreover, the board features a programmable temperature alarm with an adjustable threshold and a 1-Wire interface for setting up and controlling the board remotely.

In conclusion, the ADT7461AEBZEVB is an evaluation and demonstration board and kit that utilizes NTC thermistors to measure temperature for a wide range of applications. The board features a bridge circuit technology with thermistors and Schottky diodes for temperature sensing, temperature compensation, and a programmable alarm. The board also allows a detection accuracy of ±3.0°C, and with external compensations it can be further improved. All of these features make the ADT7461AEBZEVB an ideal platform for designers looking to accurately measure temperature in various environments.

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