analog to digital converter ad7781
The AD7781 integrates several key components that enhance its functionality for various applications in sensor measurement. The 20-bit sigma-delta ADC provides high-resolution data conversion, enabling accurate readings from bridge sensors. This high level of precision is crucial for applications such as weigh scales and strain gauges, where minute changes in input signals must be detected and processed.
The on-chip programmable gain amplifier (PGA) allows for flexible signal conditioning by adjusting the gain of the input signal before it is fed into the ADC. This adaptability is beneficial when working with sensors that output varying signal levels, ensuring that the ADC operates within its optimal range to maximize performance and accuracy.
Additionally, the low-noise characteristics of the PGA contribute to the overall signal integrity, minimizing the impact of external noise sources that could affect measurement accuracy. The integrated oscillator simplifies the design by eliminating the need for external timing components, thereby reducing the overall circuit size and complexity.
With a power consumption of only 330 µA, the AD7781 is designed for efficiency, making it an excellent choice for battery-operated devices. This low power requirement helps extend the operational life of portable applications, such as handheld weighing devices and remote sensing systems.
The AD7781's architecture is optimized for low power and high performance, making it suitable for a wide range of industrial and consumer applications. Its ability to deliver precise measurements in a compact and energy-efficient package makes it a valuable component in modern electronics that require reliable sensor data acquisition.The AD7781 is a complete low power front-end solution for bridge sensor products, including weigh scales, strain gages, and pressure sensors. It contains a precision low power 20-bit sigma-delta (?-?) ADC, an on-chip, low noise programmable gain amplifier (PGA), and an on-chip oscillator.
Consuming only 330 ?A, the AD7781 is particularly suitable for portable or battery-operated products.. 🔗 External reference
Related Circuits
The circuit illustrated is an analog signal generator designed to produce a chirping sound, simulating birds singing. It employs six CD4069 inverters to create three oscillators, with two of them functioning as ultra-low frequency oscillators. The oscillation frequency is...
The output voltage of a thermocouple is converted into a frequency that is measured by a digital frequency meter. The output signal from the thermocouple is proportional to the temperature difference between the hot junction and a reference thermostat...
This circuit measures the distance covered during a walk. The hardware is housed in a small box that fits into a pocket, and the display operates as follows: the leftmost display, D2 (the most significant digit), shows distances from...
The circuit is designed to convert sinusoidal input signals into TTL output signals and can process input voltages exceeding 100 mV. This circuit typically employs a comparator to achieve the conversion from sinusoidal to TTL levels. The sinusoidal input signal...
In 2011, designing a frequency converter circuit typically involves selecting an integrated circuit (IC) that meets specific requirements regarding gain and mixer spurious products, along with adding a couple of filters and a power supply. Often, the oscillator is...
The work process analysis circuit diagram illustrates the use of a flyback converter transformer model. The flyback transformer primarily consists of ideal transformer magnetizing inductance and leakage inductance components. The flyback converter circuit exhibits high-frequency resonance at both ends...