AD7788ARM

Product Overview

• Category: Analog-to-Digital Converter (ADC)
• Use: Converts analog signals into digital data
• Characteristics: High resolution, low power consumption
• Package: 16-pin TSSOP
• Essence: Precision measurement and data acquisition
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Resolution: 24 bits
• Input Voltage Range: ±VREF
• Conversion Rate: Up to 4.7 kSPS (Samples per Second)
• Power Supply: 2.7 V to 5.25 V
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AD7788ARM has a total of 16 pins arranged as follows:

1. AIN1(+) - Positive analog input
2. AIN1(-) - Negative analog input
3. REF IN(+) - Positive reference voltage input
4. REF IN(-) - Negative reference voltage input
5. AVDD - Analog power supply
6. AGND - Analog ground
7. DVDD - Digital power supply
8. DGND - Digital ground
9. DOUT/RDY - Data output/Ready signal
10. SCLK - Serial clock input
11. DIN - Serial data input
12. CS - Chip select input
13. EXTCLOCK - External clock input
14. REFINCAP - Reference decoupling capacitor
15. CAP+ - External decoupling capacitor positive terminal
16. CAP- - External decoupling capacitor negative terminal

Functional Features

• High-resolution ADC with 24-bit resolution
• Low power consumption for energy-efficient applications
• Flexible power supply range allows for versatile usage
• Serial interface for easy integration with microcontrollers
• On-chip reference voltage generator for accurate measurements
• Programmable gain amplifier for signal conditioning

Advantages and Disadvantages

Advantages: - High resolution enables precise measurements - Low power consumption extends battery life - Versatile power supply range allows for various applications - Serial interface simplifies integration with microcontrollers

Disadvantages: - Limited conversion rate compared to some other ADCs - Requires external decoupling capacitors for optimal performance

Working Principles

The AD7788ARM is based on the successive approximation register (SAR) architecture. It utilizes a programmable gain amplifier (PGA) to amplify the analog input signal, which is then converted into digital data through a series of comparisons and approximations. The 24-bit resolution ensures accurate measurement of even small changes in the input voltage.

Detailed Application Field Plans

The AD7788ARM is suitable for a wide range of applications, including but not limited to:

1. Industrial process control systems
2. Weighing scales and load cells
3. Data acquisition systems
4. Medical instrumentation
5. Precision sensor interfaces

Alternative Models

1. AD7790 - 16-bit resolution ADC with similar features
2. AD7791 - 24-bit resolution ADC with lower power consumption
3. AD7793 - 24-bit resolution ADC with integrated temperature sensor

These alternative models provide options with varying specifications and additional features to suit different application requirements.

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