AD7798BRUZ

Product Overview

Category: Integrated Circuit (IC)

Use: The AD7798BRUZ is a high-precision, low-power, 24-bit analog-to-digital converter (ADC) designed for various applications that require accurate conversion of analog signals into digital data. It is commonly used in industrial control systems, medical equipment, and scientific instruments.

Characteristics: - High precision: The AD7798BRUZ offers a resolution of up to 24 bits, ensuring accurate conversion of analog signals. - Low power consumption: This ADC operates at a low supply voltage and consumes minimal power, making it suitable for battery-powered devices. - Flexible packaging: The AD7798BRUZ is available in a small 16-lead TSSOP package, allowing for space-efficient integration into electronic designs. - Versatile essence: With its versatile features, this ADC can handle a wide range of input signal types, including voltage, current, and resistance.

Packaging/Quantity: The AD7798BRUZ is typically sold in reels or tubes containing a specified quantity of units. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Resolution: 24 bits
• Input Voltage Range: ±VREF
• Supply Voltage Range: 2.7V to 5.25V
• Operating Temperature Range: -40°C to +105°C
• Sampling Rate: Up to 470 samples per second (SPS)
• Interface: Serial Peripheral Interface (SPI)

Pin Configuration

The AD7798BRUZ features a 16-lead TSSOP package with the following pin configuration:

1. AVDD: Analog Power Supply
2. AGND: Analog Ground
3. DVDD: Digital Power Supply
4. DGND: Digital Ground
5. AIN1(+) / AIN1(-): Differential Analog Input
6. AIN2(+) / AIN2(-): Differential Analog Input
7. REFOUT: Reference Output
8. REFIN: Reference Input
9. /CS: Chip Select
10. SCLK: Serial Clock
11. DIN: Data Input
12. DOUT: Data Output
13. /RDY: Ready Indicator
14. EXCITATION: Excitation Current Source
15. VBIAS: Bias Voltage Output
16. RESET: Reset Input

Functional Features

• High-resolution ADC: The AD7798BRUZ provides 24-bit resolution, enabling precise conversion of analog signals into digital data.
• Low noise and drift: This ADC offers excellent performance in terms of low noise and drift, ensuring accurate measurements over time.
• Programmable gain amplifier (PGA): The built-in PGA allows for amplification of weak input signals, enhancing the overall sensitivity of the ADC.
• On-chip temperature sensor: The AD7798BRUZ includes an integrated temperature sensor, enabling temperature compensation for improved accuracy.

Advantages and Disadvantages

Advantages: - High precision and resolution - Low power consumption - Versatile input signal handling - Integrated temperature sensor for compensation

Disadvantages: - Limited sampling rate compared to some other ADCs - Requires external components for proper operation

Working Principles

The AD7798BRUZ operates based on the principle of successive approximation. It converts analog signals into digital data by comparing the input voltage with a reference voltage and iteratively adjusting the digital representation until a close match is achieved. The internal circuitry of the ADC performs this comparison and conversion process, resulting in accurate digital output.

Application Field Plans

The AD7798BRUZ finds applications in various fields, including:

1. Industrial Control Systems: It is used for precise measurement and control of process variables in industrial automation systems.
2. Medical Equipment: The ADC is employed in medical devices such as patient monitoring systems, where accurate conversion of physiological signals is crucial.
3. Scientific Instruments: It is utilized in scientific instruments like data loggers and environmental monitoring devices to capture and analyze analog data.

Alternative Models

1. AD7799: A similar ADC from Analog Devices with additional features such as on-chip current sources and voltage references.
2. ADS124S08: A 24-bit ADC from Texas Instruments offering high precision and low noise performance.
3. MCP3561: A 24-bit Delta-Sigma ADC from Microchip Technology known for its low power consumption and small package size.

These alternative models provide similar functionality and can be considered as alternatives to the AD7798BRUZ based on specific application requirements.

In conclusion, the AD7798BRUZ is a high-precision, low-power ADC suitable for various applications that demand accurate analog-to-digital conversion. Its versatile features, compact packaging, and excellent performance make it a popular choice among designers in industries ranging from industrial control