AD7890AN-2

Product Overview

Category

AD7890AN-2 belongs to the category of analog-to-digital converters (ADCs).

Use

The AD7890AN-2 is used to convert analog signals into digital data for processing and analysis in various applications.

Characteristics

• High-resolution: The AD7890AN-2 offers a resolution of 12 bits, ensuring accurate conversion of analog signals.
• Low power consumption: It operates at low power levels, making it suitable for battery-powered devices.
• Fast conversion rate: With a maximum conversion rate of 100 kilosamples per second (ksps), it provides real-time data acquisition.
• Wide input voltage range: The ADC can handle input voltages ranging from 0V to Vref, allowing flexibility in signal measurement.
• Serial interface: It features a serial interface that simplifies integration with microcontrollers and other digital systems.

Package

The AD7890AN-2 comes in a small outline integrated circuit (SOIC) package, which ensures ease of installation and compatibility with standard PCB designs.

Essence

The essence of the AD7890AN-2 lies in its ability to accurately convert analog signals into digital data, enabling further processing and analysis.

Packaging/Quantity

The AD7890AN-2 is typically available in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

• Resolution: 12 bits
• Conversion Rate: Up to 100 ksps
• Input Voltage Range: 0V to Vref
• Interface: Serial
• Power Supply: 2.7V to 5.25V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The AD7890AN-2 has a total of 16 pins, each serving a specific function. Here is the detailed pin configuration:

1. VDD: Power supply voltage
2. VREF: Reference voltage for the ADC conversion
3. AGND: Analog ground
4. REFOUT: Buffered reference output
5. VIN: Analog input voltage
6. SCLK: Serial clock input
7. CS: Chip select input
8. SDATA: Serial data output
9. DGND: Digital ground
10. DOUT/DRDY: Data output/Conversion ready indicator
11. PD: Power-down mode control
12. RD: Read control input
13. WR: Write control input
14. A0-A3: Address inputs
15. REFIN: External reference input
16. VSS: Negative power supply

Functional Features

High-Resolution Conversion

The AD7890AN-2 offers a 12-bit resolution, ensuring accurate conversion of analog signals into digital data.

Fast Conversion Rate

With a maximum conversion rate of 100 ksps, the AD7890AN-2 enables real-time data acquisition, making it suitable for time-sensitive applications.

Low Power Consumption

Operating at low power levels, the AD7890AN-2 is ideal for battery-powered devices, extending their battery life.

Serial Interface

The ADC features a serial interface that simplifies integration with microcontrollers and other digital systems, enabling seamless communication and control.

Advantages and Disadvantages

Advantages

• High-resolution conversion ensures accurate data acquisition.
• Fast conversion rate allows real-time signal processing.
• Low power consumption extends battery life in portable devices.
• Serial interface simplifies integration with digital systems.

Disadvantages

• Limited to 12-bit resolution, which may not be sufficient for certain high-precision applications.
• Requires an external reference voltage for accurate conversion.

Working Principles

The AD7890AN-2 operates based on the successive approximation register (SAR) architecture. It samples the analog input voltage and compares it to a reference voltage. By iteratively adjusting the digital code, it converges to a value that represents the input voltage with the desired resolution.

Detailed Application Field Plans

The AD7890AN-2 finds applications in various fields, including: 1. Industrial automation: Used for data acquisition and control systems. 2. Medical devices: Enables accurate measurement of physiological signals. 3. Test and measurement equipment: Provides high-resolution signal analysis capabilities. 4. Communication systems: Used for signal processing and modulation/demodulation tasks. 5. Automotive electronics: Enables precise sensor measurements for vehicle control systems.

Detailed and Complete Alternative Models

1. AD7891AN-2: Similar to AD7890AN-2 but offers 10-bit resolution.
2. AD7892AN-2: Higher-resolution variant with 14-bit conversion capability.
3. AD7893AN-2: Offers 8-bit resolution and lower power consumption.
4. AD7894AN-2: 16-bit ADC with enhanced accuracy and performance.

These alternative models provide options with varying resolutions