Overview
The AD7873ARQZ-REEL is a precision touchscreen controller designed by Analog Devices Inc. for 4-wire resistive touchscreens. This component provides accurate measurement and touch pressure detection, making it ideal for various applications requiring high touchscreen precision. The AD7873 operates from a single supply voltage range of 2.2 V to 5.25 V and features a 12-bit successive approximation ADC with a synchronous serial interface. It also includes on-board temperature measurement and direct battery measurement capabilities, enhancing its versatility and reliability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12-bit | |
| Supply Voltage Range | 2.2 V to 5.25 V | V |
| Operating Temperature | -40°C to 85°C | °C |
| Package Type | 16-Lead QSOP, TSSOP, LFCSP | |
| Throughput Rate | 125 kSPS | |
| On-board Reference Voltage | 2.5 V | V |
| Input Range | 0 V to VREF | V |
| Shutdown Current | < 1 µA | µA |
Key Features
- 4-wire resistive touchscreen control with 12-bit resolution
- On-board temperature measurement and direct battery measurement capabilities
- Single-ended or differential input capability
- Internal 2.5 V reference voltage with the option for external reference
- Serial interface for easy integration with microcontrollers
- Low voltage operation supporting portable and battery-powered devices
- Robust against ESD events with a long operational lifespan
- Shutdown mode to reduce current consumption to less than 1 µA
Applications
- Point-of-sale terminals
- Personal digital assistants
- Portable instrumentation
- Vehicle navigation systems
- Industrial controls
- Smart hand-held devices and touch screen monitors
Q & A
- What is the primary function of the AD7873ARQZ-REEL?
The AD7873ARQZ-REEL is a precision touchscreen controller for 4-wire resistive touchscreens, providing accurate measurement and touch pressure detection. - What is the resolution of the AD7873ARQZ-REEL?
The resolution is 12-bit. - What is the supply voltage range for the AD7873ARQZ-REEL?
The supply voltage range is from 2.2 V to 5.25 V. - What are the operating temperature ranges for the AD7873ARQZ-REEL?
The operating temperature range is from -40°C to 85°C. - What types of packages are available for the AD7873ARQZ-REEL?
The component is available in 16-Lead QSOP, TSSOP, and LFCSP packages. - What is the throughput rate of the AD7873ARQZ-REEL?
The throughput rate is 125 kSPS. - Does the AD7873ARQZ-REEL have an on-board reference voltage?
Yes, it has an on-board 2.5 V reference voltage. - Can the AD7873ARQZ-REEL measure touch pressure?
Yes, it includes touch pressure measurement capability. - How does the AD7873ARQZ-REEL conserve power when not in use?
The device has a shutdown mode that reduces current consumption to less than 1 µA. - What are some common applications of the AD7873ARQZ-REEL?
Common applications include point-of-sale terminals, personal digital assistants, portable instrumentation, vehicle navigation systems, and industrial controls.
