AD7713AR

Product Overview

• Category: Analog-to-Digital Converter (ADC)
• Use: Converts analog signals into digital data
• Characteristics: High resolution, low power consumption, versatile
• Package: 24-pin SOIC (Small Outline Integrated Circuit)
• Essence: Provides accurate and reliable conversion of analog signals
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Resolution: 24-bit
• Sampling Rate: Up to 4.17 kSPS (thousand samples per second)
• Input Voltage Range: ±Vref
• Power Supply: 2.7V to 5.25V
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AD7713AR has a total of 24 pins. The pin configuration is as follows:

1. VDD: Power supply voltage
2. VREF IN: Reference voltage input
3. AGND: Analog ground
4. AIN1(+) / AIN1(-): Differential analog input
5. AIN2(+) / AIN2(-): Differential analog input
6. AIN3(+) / AIN3(-): Differential analog input
7. AIN4(+) / AIN4(-): Differential analog input
8. DVDD: Digital power supply voltage
9. DGND: Digital ground
10. DOUT/RDY: Data output / Ready signal
11. SCLK: Serial clock input
12. DIN: Serial data input
13. CS: Chip select input
14. RESET: Reset input
15. MISO: Master In Slave Out
16. MOSI: Master Out Slave In
17. SDO: Serial data output
18. SCLK: Serial clock output
19. SYNC: Synchronization input
20. REFOUT: Reference voltage output
21. AVDD: Analog power supply voltage
22. AGND: Analog ground
23. VREF OUT: Reference voltage output
24. VSS: Ground

Functional Features

• High-resolution conversion for accurate measurement
• Low power consumption for energy efficiency
• Versatile input range for compatibility with various signals
• Serial interface for easy integration with microcontrollers
• Built-in reference voltage generator for simplified circuit design

Advantages and Disadvantages

Advantages

• High resolution ensures precise measurement accuracy
• Low power consumption extends battery life in portable applications
• Versatile input range allows for flexible signal acquisition
• Serial interface simplifies communication with microcontrollers
• Integrated reference voltage generator reduces external component count

Disadvantages

• Limited sampling rate may not be suitable for high-speed applications
• Requires external components for proper operation
• Higher cost compared to lower-resolution ADCs

Working Principles

The AD7713AR is based on the sigma-delta modulation technique. It oversamples the analog input signal and applies digital filtering to achieve high resolution. The modulator converts the analog signal into a stream of 1-bit data, which is then processed by a digital filter to produce the final digital output.

Application Field Plans

The AD7713AR finds applications in various fields, including:

1. Industrial automation: Precise measurement of physical parameters such as temperature, pressure, and flow rate.
2. Medical devices: Accurate acquisition of vital signs like heart rate, blood pressure, and oxygen levels.
3. Weighing scales: High-resolution conversion for precise weight measurements.
4. Data acquisition systems: Analog signal digitization for analysis and processing.
5. Process control: Monitoring and control of industrial processes requiring accurate measurement.

Alternative Models

1. AD7791: 16-bit ADC with similar features and lower cost.
2. AD7793: 24-bit ADC with additional features like on-chip temperature sensor.
3. ADS124S08: 24-bit ADC with higher sampling rate and integrated PGA (Programmable Gain Amplifier).
4. MCP3421: 18-bit ADC with I2C interface and low power consumption.

These alternative models offer different trade-offs in terms of resolution, features, and cost, providing options for various application requirements.

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