Overview
The ADS7843EG4 is a 4-wire touch screen controller produced by Texas Instruments. It is designed to interface with resistive touch screens, providing accurate and reliable touch position data. This product is widely used in embedded systems, portable devices, and industrial applications where precise touch input is required. The ADS7843EG4 stands out for its low power consumption, high resolution, and ease of integration, making it a competitive choice for designers seeking a robust touch screen solution.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Resolution | 12 | bits | |
| Supply Voltage | 2.7 to 5.25 | V | |
| Interface | SPI | ||
| Operating Temperature | -40 to 85 | °C | |
| Power Consumption | 0.75 | mW | Typical |
| Package | TSSOP-16 | ||
| Touch Screen Channels | 4 | X+, X-, Y+, Y- | |
| Sampling Rate | 125 | kHz | Maximum |
Key Features
- High-resolution 12-bit analog-to-digital conversion for precise touch position detection.
- Low power consumption, ideal for battery-powered devices.
- SPI interface for easy integration with microcontrollers and other digital systems.
- Wide operating voltage range (2.7V to 5.25V) for compatibility with various systems.
- Robust performance across a wide temperature range (-40°C to 85°C).
Applications
The ADS7843EG4 is widely used in applications requiring touch screen input, including:
- Consumer Electronics: Smartphones, tablets, and portable gaming devices.
- Industrial Control Panels: Human-machine interfaces (HMIs) for machinery and equipment.
- Medical Devices: Touch screen interfaces for diagnostic and monitoring equipment.
- Automotive: Infotainment systems and dashboard controls.
Q & A
1. What is the resolution of the ADS7843EG4?
The ADS7843EG4 has a resolution of 12 bits.
2. What is the operating voltage range?
The operating voltage range is 2.7V to 5.25V.
3. What interface does the ADS7843EG4 use?
It uses an SPI interface for communication.
4. What is the maximum sampling rate?
The maximum sampling rate is 125 kHz.
5. Is the ADS7843EG4 suitable for battery-powered devices?
Yes, its low power consumption makes it ideal for battery-powered devices.
6. What is the package type of the ADS7843EG4?
It comes in a TSSOP-16 package.
7. How many touch screen channels does it support?
It supports 4 touch screen channels (X+, X-, Y+, Y-).
8. What is the operating temperature range?
The operating temperature range is -40°C to 85°C.
9. Can the ADS7843EG4 be used in automotive applications?
Yes, it is suitable for automotive infotainment systems and dashboard controls.
10. What are the key advantages of the ADS7843EG4?
Its key advantages include high resolution, low power consumption, and ease of integration.
