Analog Devices Inc. AD7899AR-2

Analog Devices Inc. Part Number AD7899AR-2（Data Acquisition - Analog to Digital Converters (ADC)）, developed and manufactured by Analog Devices Inc., distributed globally by Jinftry. We distribute various electronic components from world-renowned brands and provide one-stop services, making us a trusted global electronic component distributor.

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Introducing the Analog Devices Inc. AD7899AR-2, a high-performance, 12-bit analog-to-digital converter (ADC) designed to meet the demanding requirements of industrial and instrumentation applications. With its exceptional accuracy and versatility, this ADC is the perfect solution for a wide range of measurement and control systems. The AD7899AR-2 boasts a fast conversion rate of up to 1 MSPS, ensuring real-time data acquisition and processing. Its 12-bit resolution provides precise and reliable measurements, making it ideal for applications that require high accuracy, such as temperature sensing, pressure monitoring, and voltage measurement. This ADC features a wide input voltage range of ±10V, allowing it to handle a variety of signal levels. It also offers a flexible input multiplexer, enabling the simultaneous sampling of multiple channels, further enhancing its versatility. The AD7899AR-2 is designed to operate in harsh industrial environments, with a wide temperature range of -40°C to +85°C and robust ESD protection. Its low power consumption and small form factor make it suitable for battery-powered and space-constrained applications. With its exceptional performance and reliability, the AD7899AR-2 is widely used in industrial automation, process control, medical equipment, and scientific instrumentation. Its high accuracy and fast conversion rate make it an invaluable tool for engineers and researchers in various fields. In summary, the Analog Devices Inc. AD7899AR-2 is a high-performance, 12-bit ADC that offers exceptional accuracy, versatility, and reliability. It is the perfect choice for demanding industrial and instrumentation applications, providing precise measurements and real-time data acquisition.

Analog to digital Converters (ADCs) are electronic devices used to convert continuously varying Analog signals into discrete Digital signals. This process usually includes three steps: sampling, quantization and coding. Sampling means capturing the instantaneous value of an analog signal at a fixed frequency; Quantization approximates these transient values to the nearest discrete level; Finally, the encoding converts the quantized value into binary numeric form.

ADCs（Analog-to-digital Converters） is widely used in a variety of scenarios, such as audio and video recording, measuring instruments, wireless communications, medical devices, and automotive electronics. For example, in audio devices, the ADC is responsible for converting the sound signal captured by the microphone into a digital format for easy storage and transmission.

• 1. What process converts analog to digital?

  There are three basic processes for analog to digital conversion:
  The first process is "sampling", which is to extract the sample value of the analog signal at equal intervals to turn the continuous signal into a discrete signal.
  The second process is called "quantization", which is to convert the extracted sample value into the closest digital value to represent the size of the extracted sample value.
  The third process is "encoding", which is to represent the quantized value with a set of binary digits. After these three processes, the digitization of the analog signal can be completed. This method is called "pulse encoding".
  After the digital signal is transmitted to the receiving end, a restoration process is required, that is, the received digital signal is converted back to an analog signal so that it can be understood by the receiver. This process is called "digital-to-analog conversion", which reproduces it as sound or image.

• 2. How to convert analog to digital without ADC?

  Analog to digital conversion without ADC can be achieved through PWM circuit. This method is suitable for those main control chips without built-in ADC, which needs to be solved by two GPIOs and an operational amplifier. The basic principle is to use an integral circuit to convert the PWM wave into a smooth DC voltage, and then continuously adjust the PWM duty cycle by comparing it with the voltage to be measured until the output of the comparator changes from 0 to 1, and record the current PWM duty cycle, thereby realizing the measurement of the analog voltage.

• 3. When is ADC used?

  ADC (Analog-to-Digital Converter) is widely used in a variety of scenarios, including but not limited to:
  Sensor interface: For example, temperature sensors, pressure sensors, and light sensors, ADC converts analog voltages into digital signals for the use of digital thermometers, temperature control systems, barometers, air pressure sensing systems, light intensity detection and control systems.
  Audio signal processing: In microphones, ADC converts analog audio signals into digital signals for digital audio processing, recording, and playback.
  Medical equipment: Such as electrocardiograms (ECGs) and oximeters, ADC converts analog signals of ECG signals and blood oxygen saturation into digital signals for heart health monitoring and diagnosis and blood oxygen level monitoring.
  Data acquisition system: In various applications that need to collect data from analog signals, ADC is used to convert analog signals into digital signals for storage, processing, and analysis.