AD7147PACPZ-RL

Product Overview

Category

The AD7147PACPZ-RL belongs to the category of integrated circuits (ICs).

Use

This IC is primarily used for capacitive touch sensing applications.

Characteristics

• High sensitivity: The AD7147PACPZ-RL offers high sensitivity, allowing it to detect even the slightest touch.
• Low power consumption: It is designed to operate with low power consumption, making it suitable for battery-powered devices.
• Compact package: The IC comes in a small package, enabling its integration into space-constrained designs.
• Versatile functionality: It supports various touch sensing configurations, providing flexibility for different application requirements.

Package and Quantity

The AD7147PACPZ-RL is available in a 16-lead LFCSP (lead frame chip scale package) package. It is typically sold in reels, with a quantity of 2500 units per reel.

Specifications

• Supply voltage range: 2.6V to 3.6V
• Operating temperature range: -40°C to +85°C
• Capacitance resolution: 13 bits
• Number of sensor inputs: 14
• I/O interface: I2C (Inter-Integrated Circuit)
• Conversion time: 8ms per channel

Pin Configuration

The AD7147PACPZ-RL features a 16-lead LFCSP package with the following pin configuration:

1. VDD: Power supply voltage
2. GND: Ground reference
3. SDA: Serial data input/output for I2C communication
4. SCL: Serial clock input for I2C communication
5. IRQ: Interrupt output
6. ADDR: Address selection input
7. CIN0: Capacitive touch sensor input 0
8. CIN1: Capacitive touch sensor input 1
9. CIN2: Capacitive touch sensor input 2
10. CIN3: Capacitive touch sensor input 3
11. CIN4: Capacitive touch sensor input 4
12. CIN5: Capacitive touch sensor input 5
13. CIN6: Capacitive touch sensor input 6
14. CIN7: Capacitive touch sensor input 7
15. CIN8: Capacitive touch sensor input 8
16. CIN9: Capacitive touch sensor input 9

Functional Features

The AD7147PACPZ-RL offers the following functional features:

• Proximity detection: It can detect the presence of an object without direct contact.
• Multi-touch support: The IC allows for simultaneous detection of multiple touches.
• Noise filtering: It incorporates advanced algorithms to filter out noise and improve touch sensing accuracy.
• Automatic calibration: The IC includes built-in calibration routines to compensate for environmental changes and ensure reliable touch detection.

Advantages and Disadvantages

Advantages

• High sensitivity enables accurate touch detection.
• Low power consumption prolongs battery life in portable devices.
• Versatile functionality supports various touch sensing configurations.
• Compact package facilitates integration into space-constrained designs.

Disadvantages

• Limited number of sensor inputs (14) may restrict complex touch sensing applications.
• Requires external components for proper operation, increasing overall system complexity.

Working Principles

The AD7147PACPZ-RL operates based on the principle of capacitive sensing. It measures changes in capacitance when a conductive object, such as a finger, approaches or touches the sensor inputs. These capacitance changes are converted into digital signals, allowing the IC to detect and interpret touch events.

Detailed Application Field Plans

The AD7147PACPZ-RL finds application in various fields, including:

1. Consumer electronics: It can be used in smartphones, tablets, and wearable devices for touch input functionality.
2. Home appliances: The IC enables touch control interfaces in appliances like refrigerators, ovens, and washing machines.
3. Automotive: It is suitable for implementing touch-sensitive controls in car infotainment systems and climate control panels.
4. Industrial automation: The IC can be utilized in human-machine interface (HMI) applications, providing intuitive touch-based control.

Detailed and Complete Alternative Models

1. AD7147ACPZ-RL: Similar to the AD7147PACPZ-RL, but without the lead frame chip scale package.
2. AD7147ACPZ-REEL7: Same as AD7147ACPZ-RL, but supplied in tape and reel packaging.
3. AD7147BCPZ-RL7: A variant with additional features, such as increased sensor inputs and extended temperature range.

These alternative models offer similar capacitive touch sensing capabilities, catering to different application requirements.

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