AD7278ARMZ

Product Overview

• Category: Analog-to-Digital Converter (ADC)
• Use: Converts analog signals into digital data for processing and analysis
• Characteristics:
  • High resolution and accuracy
  • Low power consumption
  • Small form factor
  • Wide input voltage range
• Package: MSOP-10
• Essence: Provides precise and efficient conversion of analog signals to digital format
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Resolution: 12 bits
• Sampling Rate: Up to 1 MSPS (Mega Samples Per Second)
• Input Voltage Range: ±Vref
• Power Supply: 2.7V to 5.25V
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The AD7278ARMZ has the following pin configuration:

```

---

| | | 1 2 3 4 5 6 7 8 9 10| |_______________________________________|

1. VDD
2. VIN+
3. VIN-
4. AGND
5. REF
6. SCLK
7. CS
8. SDATA
9. DGND
10. VDD ```

Functional Features

• High-resolution conversion: The AD7278ARMZ offers 12-bit resolution, ensuring accurate representation of analog signals.
• Low power consumption: Designed for power-sensitive applications, it consumes minimal power during operation.
• Flexible input voltage range: With a wide input voltage range of ±Vref, it can handle various signal amplitudes.
• Serial interface: It utilizes a serial interface (SCLK, CS, SDATA) for easy integration with microcontrollers and other digital systems.
• Small form factor: The MSOP-10 package allows for compact designs in space-constrained applications.

Advantages and Disadvantages

Advantages: - High resolution and accuracy - Low power consumption - Wide input voltage range - Compact form factor

Disadvantages: - Limited sampling rate compared to some higher-end ADCs - Requires an external reference voltage (REF)

Working Principles

The AD7278ARMZ operates based on the successive approximation register (SAR) architecture. It samples the analog input voltage and performs a series of comparisons to determine the digital representation. The internal SAR circuitry iteratively approximates the input voltage by successively adjusting the most significant bit (MSB) until the conversion is complete. This process ensures accurate digitization of the analog signal.

Application Field Plans

The AD7278ARMZ finds applications in various fields, including but not limited to: - Industrial automation - Medical devices - Test and measurement equipment - Data acquisition systems - Audio processing

Alternative Models

• AD7276: 12-bit ADC with lower power consumption but limited input voltage range.
• AD7298: 12-bit ADC with higher sampling rate and additional features such as temperature sensing.
• AD7476: 12-bit ADC with similar specifications but available in a different package (SSOP-16).

These alternative models offer different trade-offs in terms of power consumption, input voltage range, sampling rate, and package options, allowing designers to choose the most suitable option for their specific requirements.

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