ADS7823E/250

Product Overview

Category

The ADS7823E/250 belongs to the category of analog-to-digital converters (ADCs).

Use

This product is primarily used for converting analog signals into digital data, making it suitable for various applications in industries such as telecommunications, industrial automation, and consumer electronics.

Characteristics

• High-resolution: The ADS7823E/250 offers a resolution of 12 bits, ensuring accurate conversion of analog signals.
• Low power consumption: It operates on low power, making it energy-efficient and suitable for battery-powered devices.
• Small package size: The compact package allows for easy integration into space-constrained designs.
• Wide input voltage range: The ADC can handle input voltages ranging from 0V to Vref, providing flexibility in signal acquisition.
• Serial interface: It features a serial interface that enables easy communication with microcontrollers or other digital devices.

Package and Quantity

The ADS7823E/250 is available in a small outline integrated circuit (SOIC) package. Each package contains one unit of the ADC.

Specifications

• Resolution: 12 bits
• Input voltage range: 0V to Vref
• Supply voltage: 2.7V to 5.5V
• Operating temperature range: -40°C to +85°C
• Conversion rate: Up to 200 kilosamples per second (ksps)
• Interface: Serial I/O

Pin Configuration

The ADS7823E/250 has a total of 8 pins, which are assigned specific functions:

1. VDD: Power supply pin (+2.7V to +5.5V)
2. GND: Ground pin
3. SDA: Serial data input/output pin
4. SCL: Serial clock input pin
5. ADDR0: Address selection pin (bit 0)
6. ADDR1: Address selection pin (bit 1)
7. AIN: Analog input pin
8. REF: Reference voltage input pin

Functional Features

• High-speed conversion: The ADS7823E/250 can perform conversions at a rate of up to 200 ksps, allowing for real-time data acquisition.
• Low noise performance: It offers excellent signal-to-noise ratio, ensuring accurate and reliable measurements.
• Programmable gain amplifier: The ADC includes a programmable gain amplifier that allows for amplification of weak signals, enhancing sensitivity.
• Internal reference voltage: It features an internal reference voltage source, eliminating the need for an external reference.

Advantages and Disadvantages

Advantages

• High resolution ensures precise analog-to-digital conversion.
• Low power consumption makes it suitable for battery-powered devices.
• Small package size enables easy integration into compact designs.
• Wide input voltage range provides flexibility in signal acquisition.
• Serial interface simplifies communication with digital devices.

Disadvantages

• Limited number of input channels may restrict certain applications requiring multiple inputs.
• Lack of built-in digital filters may require additional external filtering for specific applications.

Working Principles

The ADS7823E/250 utilizes successive approximation register (SAR) architecture for analog-to-digital conversion. It samples the analog input voltage and compares it to a reference voltage using a comparator. The SAR algorithm then determines the digital representation of the input voltage by iteratively adjusting the comparison based on the binary search method.

Detailed Application Field Plans

The ADS7823E/250 finds application in various fields, including: 1. Industrial automation: Used for monitoring and control systems, process control, and data acquisition. 2. Telecommunications: Employed in communication equipment for signal processing and measurement. 3. Consumer electronics: Integrated into devices such as audio equipment, instrumentation, and portable devices for signal conversion.

Alternative Models

1. ADS7823E/500: Similar to the ADS7823E/250 but with a higher conversion rate of up to 500 ksps.
2. ADS7824: Offers 8 channels instead of 1, allowing for simultaneous conversion of multiple analog signals.
3. ADS7830: Provides 8 channels and a resolution of 8 bits, suitable for applications requiring lower precision.

In conclusion, the ADS7823E/250 is a high-resolution analog-to-digital converter that offers low power consumption, small package size, and wide input voltage range. Its functional features include high-speed conversion, low noise performance, and a programmable gain amplifier. While it has limitations in terms of input channels and digital filtering, it finds application in industrial automation, telecommunications, and consumer electronics. Alternative models such as the ADS7823E/500, ADS7824, and ADS7830 offer different specifications to cater to specific requirements.