AR1020-I/SO Microchip Technology, AR1020-I/SO Datasheet - Page 10
![IC TOUCH SCREEN CTRLR 20-SOIC](/photos/6/64/66480/150-20-soic_sml.jpg)
AR1020-I/SO
Manufacturer Part Number
AR1020-I/SO
Description
IC TOUCH SCREEN CTRLR 20-SOIC
Manufacturer
Microchip Technology
Type
Resistiver
Specifications of AR1020-I/SO
Package / Case
20-SOIC (7.5mm Width)
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
Resolution
10 bit
Interface Type
I2C, SPI
Supply Voltage (max)
5 V
Supply Voltage (min)
3.3 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Supply Current
300 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Sampling Rate (per Second)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AR1020-I/SO
Manufacturer:
NSC
Quantity:
1 500
Part Number:
AR1020-I/SO
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
7.5 5-wire Touch Sensor Interface
Sensor tail pin-outs can vary by manufacturer and part number. Ensure sensor tail pins for one pair of diagonally
related sensor corners are connected to the controller’s X–/X+ pins and the tail pins for the other pair of diagonally
related corners are connected to the controller’s Y–/Y+ pins. The controller’s X–/X+ and Y–/Y+ pin pairs do not
need to connect to a specific sensor axis. The orientation of controller pins X– and X+ to the two selected
diagonal sensor corners is not important. Likewise, the orientation of controller pins Y– and Y+ to the other two
selected diagonal sensor corners is not important. The sensor tail pin connected to its topsheet must be
connected to the controller’s 5WSX– pin.
Connections to a 5-wire touch sensor are as follows.
Tie unused controller pins SX-, SY-, and SY+ to VSS.
DS41393A-Page 6
Figure 5 : 5-wire Touch Sensor Interface
The capacitance of alternate ESD diodes may adversely affect touch performance. A lower
capacitance is better. The PESD5V0S1BA parts shown in the reference design have a typical
capacitance of 35pF. Test to ensure that selected ESD protection does not degrade touch
performance.
ESD protection is shown in the reference design, but acceptable protection is dependent on your
specific application. Ensure your ESD solution meets your design requirements.
© 2009 Microchip Technology, Inc.