Overview
The AD7873ACP-REEL7, produced by Analog Devices Inc., is a precision touch screen controller designed for 4-wire resistive touchscreens. This component provides accurate measurement and touch pressure detection, making it ideal for a variety of applications requiring high-resolution touchscreen interaction. The AD7873 operates from a single supply voltage range of 2.2V to 5.25V and features an on-board 2.5V reference voltage, which can be used internally or externally. It also includes on-chip temperature measurement and direct battery measurement capabilities, enhancing its versatility and reliability in diverse environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12-bit | |
| Interface | Serial | |
| Supply Voltage | 2.2V to 5.25V | V |
| Operating Temperature | -40°C to 85°C | °C |
| Package | 16-lead QSOP, TSSOP, or LFCSP | |
| Throughput Rate | 125 kSPS | |
| Voltage Reference | Internal (2.5V) and External |
Key Features
- High-resolution 12-bit successive approximation ADC for precise touchscreen interaction
- On-board 2.5V reference voltage for reduced external component count
- On-chip temperature sensor and direct battery measurement capabilities
- Touch pressure measurement and single-ended or differential input capability
- Low voltage operation supporting portable and battery-powered devices
- Robust against ESD events and long operational life span
- High-speed serial interface for efficient data transfer
- Programmable 8-bit or 12-bit resolution and shutdown mode for power conservation
Applications
- Point-of-sale terminals
- Personal digital assistants and smart hand-held devices
- Touch screen monitors
- Portable instrumentation
- Vehicle navigation systems
- Industrial controls
Q & A
- What is the primary function of the AD7873ACP-REEL7? The AD7873ACP-REEL7 is a precision touch screen controller for 4-wire resistive touchscreens, providing accurate measurement and touch pressure detection.
- What is the resolution of the AD7873? The AD7873 has a 12-bit resolution.
- What is the supply voltage range for the AD7873? The supply voltage range is from 2.2V to 5.25V.
- What types of packages are available for the AD7873? The AD7873 is available in 16-lead QSOP, TSSOP, or LFCSP packages.
- Does the AD7873 support temperature measurement? Yes, the AD7873 includes an on-chip temperature sensor.
- What is the throughput rate of the AD7873? The throughput rate is 125 kSPS.
- Is the AD7873 robust against ESD events? Yes, the AD7873 is robust against ESD events.
- What are some common applications of the AD7873? Common applications include point-of-sale terminals, personal digital assistants, touch screen monitors, and industrial controls.
- Can the AD7873 be used in industrial environments? Yes, the AD7873 has an extended temperature range suitable for industrial applications.
- How does the AD7873 conserve power? The AD7873 features a shutdown mode that reduces current consumption to less than 1 µA when not in use.
