AD7789BRM

Product Overview

Category

The AD7789BRM 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 a wide range of applications in various industries.

Characteristics

• High precision: The AD7789BRM offers high-resolution conversion, ensuring accurate and reliable digital representation of analog signals.
• Low power consumption: This ADC is designed to operate with minimal power consumption, making it suitable for battery-powered devices.
• Small package size: The AD7789BRM comes in a compact package, allowing for easy integration into space-constrained designs.
• Wide input voltage range: It can handle a broad range of input voltages, enabling flexibility in signal acquisition.

Package and Quantity

The AD7789BRM is available in a small outline integrated circuit (SOIC) package. Each package contains one unit of the ADC.

Specifications

• Resolution: 16 bits
• Input voltage range: ±Vref
• Conversion rate: Up to 250 kSPS (samples per second)
• Operating temperature range: -40°C to +85°C
• Supply voltage: 2.7 V to 5.25 V
• Interface: Serial peripheral interface (SPI)

Pin Configuration

The AD7789BRM has a total of 20 pins. The following table provides a detailed pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VDD | Power supply voltage | | 2 | AGND | Analog ground | | 3 | AVDD | Analog power supply voltage | | 4 | REFOUT | Reference output | | 5 | REFIN | Reference input | | 6 | AIN1(+) | Positive analog input | | 7 | AIN1(-) | Negative analog input | | 8 | AIN2(+) | Positive analog input | | 9 | AIN2(-) | Negative analog input | | 10 | DVDD | Digital power supply voltage | | 11 | DGND | Digital ground | | 12 | CS | Chip select | | 13 | SCLK | Serial clock | | 14 | DIN | Data input | | 15 | DOUT | Data output | | 16 | RDY | Ready | | 17 | PDWN | Power down | | 18 | RST | Reset | | 19 | VIO | I/O supply voltage | | 20 | NC | No connection |

Functional Features

• High-resolution conversion: The AD7789BRM offers 16-bit resolution, ensuring accurate representation of analog signals.
• Low noise performance: This ADC provides excellent signal-to-noise ratio, resulting in high-quality digital data.
• Flexible input configuration: It supports differential and pseudo-differential input configurations, allowing for versatile signal acquisition.
• Programmable gain amplifier (PGA): The built-in PGA enables amplification of weak input signals, enhancing the overall sensitivity of the ADC.

Advantages and Disadvantages

Advantages

• High precision and accuracy
• Low power consumption
• Compact package size
• Wide input voltage range
• Excellent signal-to-noise ratio

Disadvantages

• Limited maximum conversion rate compared to some other ADCs
• Requires an external reference voltage source

Working Principles

The AD7789BRM operates based on the successive approximation register (SAR) architecture. It samples the analog input signal, converts it into a digital representation using the internal ADC circuitry, and outputs the result through the serial interface.

Application Field Plans

The AD7789BRM is suitable for various applications, including but not limited to: - Industrial process control - Medical instrumentation - Data acquisition systems - Portable measurement devices - Sensor interfaces

Alternative Models

For those seeking alternative options, the following ADC models can be considered: - AD7790: 24-bit resolution, lower power consumption - AD7791: 16-bit resolution, higher conversion rate - AD7792: 24-bit resolution, integrated temperature sensor

These alternatives provide different features and specifications that may better suit specific application requirements.

In conclusion, the AD7789BRM is a high-precision analog-to-digital converter with low power consumption and a compact package size. It offers excellent signal-to-noise ratio and wide input voltage range. While it has some limitations in terms of maximum conversion rate and external reference voltage requirement, it is well-suited for various applications in different industries.