AD7708BRU-REEL

Product Overview

Category

The AD7708BRU-REEL belongs to the category of Analog-to-Digital Converters (ADCs).

Use

This product is primarily used for converting analog signals into digital data. It is commonly employed in various applications that require precise and accurate conversion of analog signals, such as sensor interfaces, industrial automation, and data acquisition systems.

Characteristics

• High-resolution: The AD7708BRU-REEL offers a high resolution of up to 16 bits, ensuring accurate conversion of analog signals.
• Low power consumption: This ADC operates at low power levels, making it suitable for battery-powered devices and energy-efficient applications.
• Versatile input range: It supports both single-ended and differential input configurations, providing flexibility in signal acquisition.
• On-chip filtering: The device incorporates programmable filters to eliminate noise and enhance signal quality.
• Serial interface: The ADC utilizes a serial interface (SPI) for communication with microcontrollers or other digital devices.

Package and Quantity

The AD7708BRU-REEL is available in a small outline integrated circuit (SOIC) package. It is typically supplied in reels containing a specific quantity of units, which may vary depending on the supplier or manufacturer.

Specifications

• Resolution: Up to 16 bits
• Input Channels: 8
• Input Range: Programmable, ±Vref
• Conversion Rate: Up to 250 kSPS (samples per second)
• Supply Voltage: 2.7 V to 5.25 V
• Operating Temperature Range: -40°C to +105°C

Pin Configuration

The AD7708BRU-REEL features a 28-pin SOIC package with the following pin configuration:

1. AIN1(+) - Analog Input Channel 1 Positive Terminal
2. AIN1(-) - Analog Input Channel 1 Negative Terminal
3. AIN2(+) - Analog Input Channel 2 Positive Terminal
4. AIN2(-) - Analog Input Channel 2 Negative Terminal
5. AIN3(+) - Analog Input Channel 3 Positive Terminal
6. AIN3(-) - Analog Input Channel 3 Negative Terminal
7. AIN4(+) - Analog Input Channel 4 Positive Terminal
8. AIN4(-) - Analog Input Channel 4 Negative Terminal
9. AIN5(+) - Analog Input Channel 5 Positive Terminal
10. AIN5(-) - Analog Input Channel 5 Negative Terminal
11. AIN6(+) - Analog Input Channel 6 Positive Terminal
12. AIN6(-) - Analog Input Channel 6 Negative Terminal
13. AIN7(+) - Analog Input Channel 7 Positive Terminal
14. AIN7(-) - Analog Input Channel 7 Negative Terminal
15. AIN8(+) - Analog Input Channel 8 Positive Terminal
16. AIN8(-) - Analog Input Channel 8 Negative Terminal
17. VREF(+) - Reference Voltage Positive Terminal
18. VREF(-) - Reference Voltage Negative Terminal
19. DVDD - Digital Supply Voltage
20. DGND - Digital Ground
21. CS - Chip Select
22. SCLK - Serial Clock
23. DIN - Data Input
24. DOUT - Data Output
25. DRDY - Data Ready
26. RESET - Reset Input
27. AVDD - Analog Supply Voltage
28. AGND - Analog Ground

Functional Features

• Programmable Gain Amplifier (PGA): The AD7708BRU-REEL incorporates a PGA that allows amplification of the input signal to improve resolution and accuracy.
• On-Chip Temperature Sensor: It includes an on-chip temperature sensor for monitoring the device's operating temperature.
• Digital Filters: The ADC features programmable digital filters to remove noise and enhance signal quality.
• Daisy-Chain Mode: Multiple AD7708BRU-REEL devices can be connected in a daisy-chain configuration, simplifying the interface with microcontrollers.

Advantages and Disadvantages

Advantages

• High resolution ensures accurate conversion of analog signals.
• Low power consumption makes it suitable for energy-efficient applications.
• Versatile input range provides flexibility in signal acquisition.
• On-chip filtering improves signal quality.
• Serial interface simplifies communication with digital devices.

Disadvantages

• Limited number of input channels (8 channels).
• Requires external voltage reference for optimal performance.

Working Principles

The AD7708BRU-REEL operates based on the successive approximation register (SAR) architecture. It samples the analog input voltage and converts it into a digital representation using an internal SAR algorithm. The converted digital data is then made available through the serial interface for further processing or storage.

Application Field Plans

The AD7708BRU