AR1020T-I/SS Microchip Technology, AR1020T-I/SS Datasheet - Page 5

• Manufacturer Part Number: AR1020T-I/SS
• Description: IC TOUCH SCREEN CTRLR 20-SSOP
• Manufacturer: Microchip Technology
• Type: Resistiver

Specifications of AR1020T-I/SS

• Package / Case: 20-SSOP
• Touch Panel Interface: 4-Wire, 5-Wire, 8-Wire
• Number Of Inputs/keys: 3 Key
• Resolution (bits): 10 b
• Data Interface: I²C, Serial, SPI™
• Voltage - Supply: 3.3 V ~ 5.5 V
• Current - Supply: 17mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Voltage Supply Source: Single Supply
• Supply Voltage Range: 3.135V To 3.465V, 4.75V To 5.25V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: TSSOP
• No. Of Pins: 20
• Svhc: No SVHC (15-Dec-2010)
• Supply: RoHS Compliant
• Ic Function: Touch Screen Controller
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sampling Rate (per Second): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1 GENERAL
The mTouch AR1000 Series Resistive Touch Screen Controller is a complete, easy to integrate, cost effective,
and universal touch screen controller chip solution.
The AR1000 Series is designed for high volume, small form factor touch solutions with quick time to market
requirements.
Developed by touch experts with over 15 years experience, the AR1000 Series has sophisticated proprietary
touch screen decoding algorithms allowing it to send your application fully processed and reliable touch
coordinates.
2 FEATURES
Special Features:
• RoHS Compliant
• Power-Saving Sleep mode
• Industrial Temperature Range
• Built in drift compensation algorithm
• 128 Bytes of user EEPROM
• 4 x 4 mm QFN package
Power Requirements:
• Operating Voltage: 3.3 to 5.0 volts ±5%
• Standby Sleep Current: <1uA
• Operating “No touch” Current: 3.0mA typ.
• Operating “Touch” Current: 17mA typ
Touch Modes:
• Off, Stream, Down, Up, and more.
Sensor Support
All 4, 5, and 8-wire sensors are supported, regardless of manufacturer or construction.
See BASICS OF RESISTIVE SENSORS section.
Low-Power Wake-Up
Wake-up from power saving sleep mode, via a touch or communication input.
Configuration Registers
Configuration registers provide user configuration of controller features.
See Configuration Registers section.
Touch Algorithms
Algorithms provide for good calibration-corrected coordinates, with no additional development or code.
Communication Control
AR1010 supports UART communication. AR1020 supports I2C and SPI communication.
See Communication Interface section.
© 2009 Microchip Technology, Inc.
with a touch sensor having 200Ω layers.
- Actual current is dependent on the touch sensor used.
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Touch decoding
Coordinate data filtering
Calibration corrected coordinate option
Built-in touch modes
Touch Sensor Support:
• 4 wire, 5 wire, and 8 wire analog resistive
• Lead to Lead Resistance: 50Ω to 2,000Ω
• Layer to Layer Capacitance: 0 to 0.5uF
• Touch Sensor Time Constant: 500us maximum
Touch Resolution:
• 10-bit resolution maximum
Touch Coordinate Report Rate:
• 140 reports per second typ.
Communications:
• SPI, slave mode, p/n AR1020
• I
• UART, 9600 bps, p/n AR1010
with a touch sensor of 0.02uF with 200Ω layers.
- Actual report rate is dependent on the touch sensor used.
2
C™, slave mode, p/n AR1020
DS41393A-Page 1