Atmel MXT224 Touch Screen Controller Circuit Analysis of Charge Integrator, ADC, and I/O Blocks For questions, comments, or more information about this report, or for any additional technical needs concerning semiconductor and electronics technology, please call Sales at Chipworks. 3685 Richmond Road, Suite 500, Ottawa, ON K2H 5B7 Canada Tel: 613.829.0414 Fax: 613.829.0515 www.chipworks.com
Atmel MXT224 Touch Screen Controller Some of the information in this report may be covered by patents, mask and/or copyright protection. This report should not be taken as an inducement to infringe on these rights. 2010 Chipworks Inc. This report is provided exclusively for the use of the purchasing organization. It can be freely copied and distributed within the purchasing organization, conditional upon the accompanying Chipworks accreditation remaining attached. Distribution of the entire report outside of the purchasing organization is strictly forbidden. The use of portions of the document for the support of the purchasing organization's corporate interest (e.g., licensing or marketing activities) is permitted, as defined by the fair use provisions of the copyright act. Accreditation to Chipworks must be attached to any portion of the reproduced information. CAR-1006-807 20573JMJG Revision 1.0 Published: August 31, 2010
Atmel MXT224 Touch Screen Controller Table of Contents Overview Schematics Cell Library Signal Cross-Reference List About Chipworks
Atmel MXT224 Touch Screen Controller Overview List of Figures...Page 1 List of Schematics...Page 1 Introduction...Page 4 Brief Design Overview...Page 5 Component Descriptions...Page 6 Device Summary...Page 9
Atmel MXT224 Touch Screen Controller Page 1 List of Figures To view, please click on the appropriate bookmark in the panel on the left. 0.1.1 Downstream Product Photographs HTC Incredible 0.1.2 Downstream Product Photographs HTC EVO 4G 0.1.3 Downstream Product Photographs Samsung Wave (GT-S8500) 0.1.4 Package Markings 0.1.5 Package X-Ray 0.1.6 Die Markings 0.2.1 Die Photograph Top Metal 0.2.2 Die Photograph Metal 1 0.2.3 Annotated Die Photograph Metal 1 0.2.4 Die Architecture Metal 1 List of Schematics 1.0.0 Top Level Diagram 2.0.0 I/O Driver 1 3.0.0 I/O Driver 2 3.1.0 I/O Bias 4.0.0 High Output Impedance OTA 4.1.0 Precision Current Generator Amplifier 1 4.2.0 Precision Current Generator Amplifier 2 5.0.0 Bias Generator 6.0.0 Current Driver 6.1.0 Bias Strength Control 6.2.0 Precision Current Generator Amplifier 3 6.3.0 Precision Current Generator Amplifier 4
Atmel MXT224 Touch Screen Controller Page 2 7.0.0 Variable Capacitor 8.0.0 Charge Integrator 8.1.0 Charge Integrator Control 1 8.2.0 Charge Integrator Control 2 8.3.0 Common Mode Feedback Amplifier 8.3.1 Reference Generator 8.3.2 Common Mode Feedback 9.0.0 Charge Integrator Reference Generator 10.0.0 10 Bit Pipeline ADC 10.1.0 Matrix Drive Line Switch 10.2.0 Clock Control 10.2.1 Non-Overlapping Clock Generator 10.2.2 Clock Delay 10.3.0 ADC Reference Generator 10.3.1 ADC Bias Generator 10.3.2 ADC Voltage Reference Generator 10.3.2.1 ADC Voltage Reference Selector 10.3.2.2 ADC Amplifier 10.3.3 ADC Voltage Reference Generator 2 10.3.3.1 ADC Voltage Reference Selector 2 10.4.0 Pipeline ADC Stage (Type 1) 10.4.1 ADC Stage with Decoder 10.4.1.1 Signal Comparator 10.4.1.1.1 Comparator 10.4.2 MDAC 1 10.4.2.1 Bootstrap Switch 10.4.2.2 Variable Capacitor 10.4.2.3 Capacitor Feedback 10.4.2.4 Pipeline ADC Amplifier 1 10.5.0 Pipeline ADC Stage (Type 2) 10.5.1 MDAC 2
Atmel MXT224 Touch Screen Controller Page 3 10.5.1.1 Pipeline ADC Amplifier 2 10.6.0 ADC Stage 10.7.0 Retiming Buffers 11.0.0 Reference Generator 11.1.0 Schmitt Trigger 11.2.0 Variable VREF 11.3.0 Reference Generator Buffer 11.4.0 Reference Generator OTA Buffer 11.5.0 Main Bias Generator 12.0.0 Reference Generator 2 12.1.0 Bandgap Bias Generator 12.2.0 Bandgap Voltage Reference 12.3.0 Variable Resistor Load 12.4.0 Buffer Amplifier 12.5.0 Shutdown Generator 12.6.0 High Speed BGREF Monitor 12.7.0 Variable Resistor 2 12.8.0 Comparator 13.0.0 Data Interface 13.1.0 Variable Delay Logic 13.2.0 Softstart 13.3.0 Level Shifter 13.4.0 Digital Control Interface
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