Digital thermometer with zero adjust
The ICL8069 is a precision instrumentation amplifier designed to operate effectively within specified common-mode voltage ranges, making it suitable for various sensor applications. The device's architecture allows it to amplify small differential signals while rejecting common-mode noise, ensuring high accuracy in measurements.
In this circuit, two 5 k ohm potentiometers are utilized for fine-tuning the output. The first potentiometer is dedicated to offset adjustment, allowing the user to eliminate any inherent voltage offset that may affect the accuracy of the measurement at low temperatures, specifically at -55°C. This adjustment is critical for applications requiring precise readings, as any offset can lead to significant errors in the output signal.
The second potentiometer is used for slope adjustment, which enables the user to calibrate the gain of the amplifier circuit. This feature ensures that the output signal accurately reflects the input signal's amplitude, allowing for precise scaling of the measurements. By adjusting the slope, the user can tailor the amplifier's response to match the specific requirements of the application, ensuring that the output remains linear across the operating range.
Overall, the ICL8069 circuit with its adjustable components provides a robust solution for applications that require high precision and flexibility in signal processing. The combination of common-mode range capability, offset trimming, and slope adjustment makes this circuit suitable for a variety of sensor interfaces and measurement systems. The ICL8069 brings the input within the common-mode range, while the 5 k ohm pots trim any offset at 218° (-55°C), and set the scale factor. This circuit allows "zero adjustment" as well as slope adjustment. 🔗 External reference
Related Circuits
As shown in the figures, this is a practical adjustable power supply. It utilizes an integrated voltage regulator (5G14) in conjunction with a 3DG12A transistor for current spreading, providing an output voltage range of 3 to 6V. The rated...
This clock timer utilizes a PIC16F628 microcontroller to display a 3.5-digit time format and control an external load. It is programmable to time intervals from 1 to 59 minutes. The clock features a calendar that accounts for leap years...
The circuit does not present particular difficulties for somebody that has a small experience. The two circuits are the himself, with a small difference only in their input, when they have they measure voltage or current and in connection...
In various electronics-level adjustments, such as LED drivers for LCD panel backlight controls, the AD5228 can be utilized. A manually adjustable LED driver is illustrated. The AD5228 is a dual-channel, digitally controlled potentiometer (DCP) that can be employed in applications...
By utilizing a reverse binary counter along with a binary-coded decimal (BCD) decoder, a step voltage can be generated, which can then be approximated to produce a sine wave signal with adequate accuracy for various applications. In the digital...
A digital integrated circuit simplifies the response process significantly. The diagram illustrates a circuit comprising four responder groups. The digital integrated circuit described serves as a crucial component in various electronic systems, primarily focusing on enhancing response efficiency. It comprises...