This Product Selection Guide contains information to help select products in the Touch Screen Controllers category on DigiKey.com
Touch screen controllers are integrated circuits that provide an interface between the touch screen sensor array and the device the screen operates. The controller receives position information from the sensor array which is usually resistive or capacitive. In turn, the position information is passed along to a microcontroller via a serial, parallel, USB, or UART interface.
SelectionCharacteristics
Touchscreen: Indicates the type of touchscreen the product was designed to be compatible with.
Resolution (Bits): The length of the digital word used by a device to represent a continuously variable physical quantity.
Interface: Indication of which interface(s) or protocol(s) are used by the device to communicate with other components in the system.
Voltage Reference: Indicates whether the device contains an internal voltage reference or if it needs an external one.
Voltage Supply Source: Typically represented by a range, this indicates the low and high voltage limits which one can expect standard operation. Voltages outside this range may damage the device and other system components.
Current - Supply: This represents the maximum current to which a device will meet its given specifications. Exceeding this current may damage the device and/or other system components.
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.
Mounting Type: Indicates how the device is attached.
Package / Case: Indicates the type of protective case used on an electronic component to allow easy handling, installation, and protection. This selection was determined to be the closest industry standard applicable to the supplier device packaging. Typically it is best to check the actual dimensions from the datasheet rather than depend on this terminology when designing your circuit.
Supplier Device Package: This is what the manufacturer calls the package of this device. They are manufacturer specific. It is typically best to use the actual dimensions from the datasheets rather than to go by this terminology when designing your circuit.
ProductExamples
| MFR PART # | AR1021T-I/SS |
|---|---|
| DIGIKEY PART # | AR1021T-I/SSTR-ND - Tape & Reel (TR) |
| MANUFACTURER | Microchip Technology |
| DESCRIPTION | Touchscreen Controller 4, 5, or 8 Wire Resistive 10 b I |
| DATASHEET | Click Here |
| MFR PART # | ADS7843E/2K5 |
|---|---|
| DIGIKEY PART # | 296-25901-2-ND - Tape & Reel (TR) |
| MANUFACTURER | Texas Instruments |
| DESCRIPTION | Touchscreen Controller 4 Wire Resistive 12 b Serial Interface 16-SSOP |
| DATASHEET | Click Here |
| MFR PART # | AD7879-1WARUZ-RL7 |
|---|---|
| DIGIKEY PART # | AD7879-1WARUZ-RL7TR-ND - Tape & Reel (TR) |
| MANUFACTURER | Analog Devices Inc. |
| DESCRIPTION | Touchscreen Controller 4 Wire Resistive 12 b I²C, Serial Interface 16-TSSOP |
| DATASHEET | Click Here |
MediaLinks
Articles
Assessing and Selecting a Touch Screen Controller
Touch Sensing Technology for Human Interface
Implementing Resistive Touchscreens