AD7890AR-2

Product Overview

Category

AD7890AR-2 belongs to the category of analog-to-digital converters (ADCs).

Use

The AD7890AR-2 is used to convert analog signals into digital data, making it suitable for a wide range of applications that require precise and accurate conversion.

Characteristics

• High resolution: The AD7890AR-2 offers a resolution of 12 bits, ensuring accurate conversion of analog signals.
• Fast conversion rate: With a maximum conversion rate of 100 kilosamples per second (ksps), it provides rapid data acquisition.
• Low power consumption: The device operates at low power, making it energy-efficient.
• Wide input voltage range: It can handle input voltages ranging from 0V to VREF, allowing flexibility in signal conversion.
• Small package size: The AD7890AR-2 comes in a compact package, enabling space-saving designs.

Package and Quantity

The AD7890AR-2 is available in a 16-pin small outline integrated circuit (SOIC) package. It is typically sold in quantities of one unit or multiples thereof.

Specifications

• Resolution: 12 bits
• Conversion Rate: Up to 100 ksps
• Input Voltage Range: 0V to VREF
• Power Supply: +5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOIC-16

Pin Configuration

The AD7890AR-2 features the following pin configuration:

1. VDD: Power supply voltage
2. VREF: Reference voltage input
3. AGND: Analog ground
4. VIN: Analog input voltage
5. CS: Chip select input
6. SCLK: Serial clock input
7. SDATA: Serial data output
8. DGND: Digital ground
9. DOUT: Data output
10. RD: Read input
11. WR: Write input
12. RST: Reset input
13. NC: No connection
14. NC: No connection
15. NC: No connection
16. VSS: Negative power supply voltage

Functional Features

The AD7890AR-2 offers the following functional features:

• High-resolution conversion: The 12-bit resolution ensures accurate representation of analog signals.
• Serial interface: It utilizes a serial interface for communication, allowing easy integration with microcontrollers and other digital systems.
• Low power consumption: The device operates at low power, making it suitable for battery-powered applications.
• Flexible input range: The AD7890AR-2 can handle a wide range of input voltages, providing versatility in signal conversion.

Advantages and Disadvantages

Advantages

• High resolution for accurate conversion
• Fast conversion rate for rapid data acquisition
• Low power consumption for energy efficiency
• Wide input voltage range for flexibility
• Compact package size for space-saving designs

Disadvantages

• Requires an external reference voltage (VREF)
• Limited number of available pins for additional functionalities

Working Principles

The AD7890AR-2 operates based on the successive approximation register (SAR) architecture. It samples the analog input voltage and performs a series of comparisons to determine the digital representation. The internal circuitry uses a combination of capacitors, switches, and amplifiers to achieve high-resolution conversion.

Detailed Application Field Plans

The AD7890AR-2 finds applications in various fields, including but not limited to: - Industrial automation - Medical equipment - Test and measurement instruments - Data acquisition systems - Communication devices

Alternative Models

For alternative options, consider the following models: - AD7891AR-1: 12-bit ADC with single-ended input - AD7892AR-3: 12-bit ADC with differential input - AD7893AR-4: 12-bit ADC with higher conversion rate

These models offer similar functionality and can be considered based on specific application requirements.

In conclusion, the AD7890AR-2 is a high-resolution analog-to-digital converter that offers fast conversion rates and low power consumption. Its compact package size and wide input voltage range make it suitable for various applications. While it requires an external reference voltage and has limited pins, its advantages outweigh these limitations. The device operates based on the SAR architecture and finds applications in industrial automation, medical equipment, test and measurement instruments, data acquisition systems, and communication devices. Alternative models such as the AD7891AR-1, AD7892AR-3, and AD7893AR-4 provide additional options based on specific needs.