ADS7846N/2K5G4

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Touch Screen Controller
• Characteristics:
  • High precision and accuracy
  • Low power consumption
  • Wide operating temperature range
  • Small package size
• Package: 16-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: The ADS7846N/2K5G4 is a touch screen controller IC designed for accurate and reliable touch input detection.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Resolution: 12-bit
• Conversion Rate: Up to 125,000 samples per second
• Input Voltage Range: 2.7V to 5.25V
• Operating Temperature Range: -40°C to +85°C
• Interface: SPI (Serial Peripheral Interface)

Detailed Pin Configuration

1. VCC: Power supply voltage
2. GND: Ground reference
3. DOUT: Serial data output
4. DIN: Serial data input
5. CS: Chip select
6. BUSY: Busy indicator
7. DCLK: Serial clock input
8. PD: Power-down mode control
9. XR: X-axis resistive touch screen input
10. YU: Y-axis resistive touch screen input
11. XL: X-axis resistive touch screen input
12. YD: Y-axis resistive touch screen input
13. AUX: Auxiliary analog input
14. NC: No connection
15. NC: No connection
16. NC: No connection

Functional Features

• Touch Screen Controller: Enables precise and accurate touch input detection on resistive touch screens.
• High-Speed Conversion: Supports fast conversion rates of up to 125,000 samples per second, ensuring real-time touch response.
• Low Power Consumption: Optimized power management circuitry minimizes power consumption, making it suitable for battery-powered devices.
• Wide Operating Temperature Range: Can operate reliably in extreme temperature conditions, ranging from -40°C to +85°C.
• SPI Interface: Utilizes the widely adopted Serial Peripheral Interface for easy integration with microcontrollers and other digital systems.

Advantages

• High precision and accuracy ensure reliable touch input detection.
• Low power consumption extends battery life in portable devices.
• Wide operating temperature range allows usage in various environments.
• Small package size saves board space in compact designs.
• SPI interface simplifies integration with microcontrollers.

Disadvantages

• Limited to resistive touch screen applications.
• Requires external components for touch screen sensing.
• Not suitable for multi-touch applications.

Working Principles

The ADS7846N/2K5G4 operates by measuring the voltage levels at the X and Y axes of a resistive touch screen. It utilizes an internal analog-to-digital converter (ADC) to convert the analog touch screen voltages into digital values. These digital values are then processed and communicated through the SPI interface to the host microcontroller, enabling accurate touch position detection.

Detailed Application Field Plans

The ADS7846N/2K5G4 is commonly used in various applications that require touch input functionality, including: - Portable consumer electronics (smartphones, tablets) - Industrial control panels - Medical devices - Automotive infotainment systems - Point-of-sale terminals

Detailed and Complete Alternative Models

1. ADS7843: Similar touch screen controller IC with 8-bit resolution.
2. ADS7845: Touch screen controller IC with 12-bit resolution and I2C interface.
3. ADS7849: Advanced touch screen controller IC with 12-bit resolution, I2C interface, and multi-touch support.

Note: This is not an exhaustive list, and there are other alternative models available in the market.

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