AD7747ARUZ-REEL

Product Overview

Category

AD7747ARUZ-REEL belongs to the category of integrated circuit (IC) sensors.

Use

This product is primarily used for capacitance-to-digital conversion applications.

Characteristics

• High-resolution capacitance measurement
• Low power consumption
• Wide operating voltage range
• Programmable gain amplifier
• On-chip temperature sensor

Package

AD7747ARUZ-REEL is available in a small outline package (SOIC) with 16 pins.

Essence

The essence of this product lies in its ability to accurately measure capacitance and convert it into digital data.

Packaging/Quantity

AD7747ARUZ-REEL is typically packaged in reels, containing a quantity of 250 units per reel.

Specifications

• Resolution: 24 bits
• Operating Voltage Range: 2.7V to 5.25V
• Capacitance Measurement Range: 10pF to 200pF
• Temperature Sensor Range: -40°C to +125°C
• Conversion Time: 4ms (typical)

Pin Configuration

The detailed pin configuration of AD7747ARUZ-REEL is as follows:

1. VDD: Power supply voltage
2. GND: Ground reference
3. CAPIN1: Capacitive input 1
4. CAPIN2: Capacitive input 2
5. CAPIN3: Capacitive input 3
6. CAPIN4: Capacitive input 4
7. AIN1: Analog input 1
8. AIN2: Analog input 2
9. AIN3: Analog input 3
10. AIN4: Analog input 4
11. TEMP: Temperature sensor output
12. SDA: Serial data input/output
13. SCL: Serial clock input
14. ALERT: Alert output
15. VIO: Digital I/O voltage supply
16. VDDIO: Digital I/O power supply

Functional Features

• High-resolution capacitance measurement allows for precise sensing in various applications.
• Programmable gain amplifier enables customization of the measurement range.
• On-chip temperature sensor provides accurate temperature compensation.
• Serial data interface simplifies integration with microcontrollers and other digital systems.
• Alert output pin facilitates real-time notification of specific events or conditions.

Advantages and Disadvantages

Advantages

• High resolution ensures accurate capacitance measurement.
• Wide operating voltage range allows for flexibility in different power supply configurations.
• Programmable gain amplifier enhances measurement versatility.
• On-chip temperature sensor enables reliable temperature compensation.

Disadvantages

• Limited capacitance measurement range (10pF to 200pF) may not be suitable for certain applications requiring higher capacitance values.
• Conversion time of 4ms may be relatively slow for some high-speed applications.

Working Principles

AD7747ARUZ-REEL operates based on the principle of capacitance-to-digital conversion. It measures the capacitance applied to its inputs and converts it into a digital representation using an internal analog-to-digital converter (ADC). The programmable gain amplifier allows for customization of the measurement range, while the on-chip temperature sensor compensates for temperature variations.

Detailed Application Field Plans

AD7747ARUZ-REEL finds application in various fields, including but not limited to:

1. Industrial automation: Capacitance sensing for level detection in tanks and containers.
2. Medical devices: Capacitive touch interfaces for user input in medical equipment.
3. Consumer electronics: Proximity sensing for touchless controls in smartphones and tablets.
4. Automotive: Occupancy detection for airbag deployment in vehicles.
5. Internet of Things (IoT): Capacitive sensing for human presence detection in smart homes.

Detailed and Complete Alternative Models

Some alternative models to AD7747ARUZ-REEL that offer similar functionality include:

1. AD7746: Similar to AD7747ARUZ-REEL but with a different pin configuration.
2. AD7748: Higher resolution version with 24-bit capacitance measurement.
3. AD7150: Capacitance-to-digital converter with additional features like temperature compensation and proximity sensing.

In conclusion, AD7747ARUZ-REEL is an integrated circuit sensor designed for high-resolution capacitance measurement. Its programmable gain amplifier, on-chip temperature sensor, and digital interface make it suitable for various applications in industrial automation, medical devices, consumer electronics, automotive, and IoT. While it offers advantages such as accuracy and flexibility, its limited capacitance range and conversion time may pose limitations in certain scenarios.