Overview
The AD7873ARU, manufactured by Analog Devices Inc., is a 12-bit successive approximation analog-to-digital converter (ADC) specifically designed for touch screen applications. This device operates from a single supply voltage ranging from 2.2V to 5.25V and features a synchronous serial interface. It is housed in a 16-lead TSSOP package, offering compact design and efficient performance. The AD7873ARU includes on-board switches, a track-and-hold circuit, a multiplexer, and a reference voltage source, making it a comprehensive solution for touch screen controllers.
Key Specifications
| Product Attribute | Attribute Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Resolution (Bits) | 12 b |
| Voltage - Supply | 2.2V ~ 5.25V |
| Voltage Reference | External, Internal |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Throughput Rate | 125 kSPS |
| Conversion Time | 12 DCLK cycles max |
| Track-and-Hold Acquisition Time | 3 DCLK cycles min |
Key Features
- Touch Screen Controller: Converts physical touch or gestures on the screen into electrical signals for processing by the device's software.
- On-Board Reference: Features a 2.5 V on-board reference that can be used for auxiliary input, battery monitor, and temperature measurement modes.
- Low Power Consumption: Includes a shutdown mode that reduces current consumption to less than 1 µA when not in use.
- Multiplexer and Switches: Configured with low resistance switches for driving touch screens and selecting various analog inputs.
- Direct Measurements: Capable of direct battery measurement, temperature measurement, and touch pressure measurement.
- Compact Packaging: Available in 16-lead QSOP, TSSOP, and LFCSP packages, offering space-saving advantages.
Applications
- Smartphones and Tablets: Enhances touch screen functionality in mobile devices.
- Interactive Kiosks: Used in public interactive systems for efficient user input.
- ATMs and Point-of-Sale (POS) Terminals: Improves touch screen reliability in financial and retail applications.
- Automotive Infotainment Systems: Supports touch screen interfaces in vehicle entertainment systems.
- Gaming Consoles: Enhances gaming experiences with precise touch screen controls.
- Medical Devices: Used in medical equipment requiring accurate touch screen inputs.
- Industrial Control Panels: Implemented in industrial settings for robust touch screen control.
- Wearable Devices: Supports touch screen functionality in wearable technology.
- Home Automation Systems: Used in smart home devices for user-friendly interfaces.
Q & A
- What is the resolution of the AD7873ARU?
The AD7873ARU has a resolution of 12 bits.
- What is the operating voltage range of the AD7873ARU?
The AD7873ARU operates from a single supply voltage ranging from 2.2V to 5.25V.
- What types of packages are available for the AD7873ARU?
The AD7873ARU is available in 16-lead QSOP, TSSOP, and LFCSP packages.
- What is the throughput rate of the AD7873ARU?
The throughput rate of the AD7873ARU is up to 125 kSPS.
- Does the AD7873ARU have an on-board reference voltage?
Yes, the AD7873ARU features a 2.5 V on-board reference voltage.
- What is the operating temperature range of the AD7873ARU?
The operating temperature range of the AD7873ARU is -40°C to 85°C.
- Can the AD7873ARU measure touch pressure?
Yes, the AD7873ARU is capable of measuring touch pressure.
- Does the AD7873ARU have a shutdown mode to conserve power?
Yes, the AD7873ARU has a shutdown mode that reduces current consumption to less than 1 µA when not in use.
- What types of devices typically use the AD7873ARU?
The AD7873ARU is used in various devices such as smartphones, tablets, interactive kiosks, ATMs, and automotive infotainment systems.
- How does the AD7873ARU handle analog inputs?
The AD7873ARU uses an on-chip multiplexer with low resistance switches to select and process various analog inputs, including X, Y, and Z panel coordinates, battery voltage, and chip temperature.
