Overview
The ADS7846E/2K5G4 is a next-generation touch screen controller produced by Texas Instruments. It is designed as a successor to the industry-standard ADS7843, maintaining 100% pin compatibility, which allows for seamless upgrades in existing applications. This controller is optimized for battery-operated systems, particularly those with resistive touch screens, such as personal digital assistants (PDAs), pagers, cellular phones, and other portable equipment. The ADS7846E/2K5G4 integrates several advanced features including direct battery measurement, on-chip temperature measurement, and touch-pressure measurement, making it a versatile and efficient choice for various applications.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Supply Voltage | 2.2V to 5.25V | V |
| Internal Reference Voltage | 2.5V | V |
| Battery Measurement Range | 0V to 6V | V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Types | TSSOP-16, SSOP-16, QFN-16, VFBGA-48 | |
| Interface | QSPI/SPI 3-Wire Interface | |
| Power Consumption (typ at 2.7V, reference off) | < 0.75mW | mW |
| Maximum Clock Rate | 125kHz | kHz |
| Resolution | 12-bit |
Key Features
- SAME PINOUT AS ADS7843: Ensures compatibility with existing designs.
- 2.2V TO 5.25V OPERATION: Flexible voltage range for various applications.
- INTERNAL 2.5V REFERENCE: Can be used for auxiliary input, battery monitor, and temperature measurement.
- DIRECT BATTERY MEASUREMENT (0V to 6V): Allows monitoring of battery voltage.
- ON-CHIP TEMPERATURE MEASUREMENT: Provides temperature data without external components.
- TOUCH-PRESSURE MEASUREMENT: Enhances touch screen functionality.
- QSPI/SPI 3-WIRE INTERFACE: Supports high-speed data transfer.
- AUTO POWER-DOWN: Reduces power consumption when not in use.
- TSSOP-16, SSOP-16, QFN-16, AND VFBGA-48 PACKAGES: Various packaging options for different design needs.
Applications
- PERSONAL DIGITAL ASSISTANTS (PDAs): Ideal for resistive touch screens in PDAs.
- PORTABLE INSTRUMENTS: Suitable for handheld instruments requiring touch screen interfaces.
- POINT-OF-SALE TERMINALS: Used in touch screen monitors for retail applications.
- PAGERS: Enhances functionality in pagers with touch screen capabilities.
- TOUCH SCREEN MONITORS: Applicable to various touch screen monitors.
- CELLULAR PHONES: Optimized for use in cellular phones with resistive touch screens.
Q & A
- What is the ADS7846E/2K5G4?
The ADS7846E/2K5G4 is a next-generation touch screen controller produced by Texas Instruments, designed as a successor to the ADS7843.
- What are the key features of the ADS7846E/2K5G4?
Key features include internal 2.5V reference, direct battery measurement, on-chip temperature measurement, touch-pressure measurement, and QSPI/SPI 3-wire interface.
- What is the operating voltage range of the ADS7846E/2K5G4?
The operating voltage range is from 2.2V to 5.25V.
- What are the available package types for the ADS7846E/2K5G4?
The available package types are TSSOP-16, SSOP-16, QFN-16, and VFBGA-48.
- What is the typical power consumption of the ADS7846E/2K5G4 at 2.7V?
The typical power consumption is less than 0.75mW with the reference off.
- What is the maximum clock rate of the ADS7846E/2K5G4?
The maximum clock rate is up to 125kHz.
- Is the ADS7846E/2K5G4 compatible with the ADS7843?
Yes, it is 100% pin-compatible with the ADS7843.
- What are some common applications of the ADS7846E/2K5G4?
Common applications include personal digital assistants, portable instruments, point-of-sale terminals, pagers, touch screen monitors, and cellular phones.
- Does the ADS7846E/2K5G4 support auto power-down?
Yes, it supports auto power-down to reduce power consumption when not in use.
- What is the operating temperature range of the ADS7846E/2K5G4?
The operating temperature range is from -40°C to +85°C.
