Data Acquisition - Touch Screen Controllers

Part Number	Description / PDF	Quantity
AD7889-1ACBZ-RL7 Analog Devices, Inc.	12-BIT SAR ADC, 2 CHANNEL	938690
AD7873BRQ Analog Devices, Inc.	ADC 12BIT TOUCHSCREEN	307
AD7873ACP-REEL7 Analog Devices, Inc.	TOUCH SCREEN DIGITIZER	3000
AD7889-1ACBZ-RL Analog Devices, Inc.	12-BIT SAR ADC, 2 CHANNEL	10000
AD7873ARUZ-REEL Analog Devices, Inc.	TOUCH SCREEN DIGITIZER	834
AD7879WARUZ-RL7 Analog Devices, Inc.	IC SCREEN CNTRL 12BIT 16TSSOP	727
AD7843ARQ-REEL7 Analog Devices, Inc.	TOUCH SCREEN DIGITIZER	34192
AD7843ARQ Analog Devices, Inc.	TOUCH SCREEN DIGITIZER	137310
AD7879ACPZ-RL Analog Devices, Inc.	ADC, SUCCESSIVE APPROXIMATION, 1	14600
AD7873ARQZ-REEL7 Analog Devices, Inc.	TOUCH SCREEN DIGITIZER	77000
AD7873ARQZ Analog Devices, Inc.	IC SCREEN CNTRL 12BIT 16QSOP	181
AD7843ARU Analog Devices, Inc.	TOUCH SCREEN DIGITIZER	524
AD7879WACPZ-R5 Analog Devices, Inc.	IC SCREEN CNTRL 12BIT 16LFCSP	0
MAX11803EWC+T Analog Devices, Inc.	ANALOG CIRCUIT, 1 FUNC, CMOS, PB	15898
AD7873ARQ Analog Devices, Inc.	ADC 12BIT TOUCHSCREEN	16993
AD7873ARU-REEL Analog Devices, Inc.	TOUCH SCREEN DIGITIZER	12500
AD7879-1ACPZ-500R7 Analog Devices, Inc.	IC SCREEN CNTRL 12BIT 16LFCSP	832
AD7877ACPZ-500RL7 Analog Devices, Inc.	IC SCREEN CNTRL 12BIT 32LFCSP	500
AD7877ACP-500RL7 Analog Devices, Inc.	TOUCH SCREEN CONTROLLER	4968
AD7873BRQZ-REEL7 Analog Devices, Inc.	ADC 12BIT TOUCHSCREEN	10000

Data Acquisition - Touch Screen Controllers

1. Overview

Touch screen controllers (TSCs) are specialized integrated circuits designed to process signals from touch-sensitive surfaces and convert them into digital data for host systems. These ICs serve as the interface between touch sensors and processing units, enabling precise position detection, gesture recognition, and pressure sensitivity. With the proliferation of touch-enabled devices in consumer electronics, industrial automation, and automotive systems, TSCs have become critical components for human-machine interaction (HMI).

2. Main Types & Functional Classification

Type	Functional Features	Application Examples
Capacitive TSC	Supports multi-touch, high sensitivity, glass overlay compatibility	Smartphones, tablets, industrial HMIs
Resistive TSC	Single-touch detection, low cost, glove operation capability	ATMs, medical devices, POS terminals
Optical TSC	Edge-mounted sensors, high durability, large-format support	Digital signage, interactive kiosks
Force-Sensing TSC	Pressure measurement with haptic feedback integration	Gaming consoles, automotive controls

3. Structure & Composition

A typical TSC IC includes: 1) Sensor interface circuitry for signal conditioning, 2) Analog-to-digital converter (ADC) for position data digitization, 3) Digital signal processor (DSP) for coordinate calculation, 4) Communication interface (I2C/SPI) for host connection, and 5) Power management module. Advanced designs integrate noise suppression algorithms and self-capacitance/projection-capacitance detection architectures.

4. Key Technical Specifications

Parameter	Description & Importance
Resolution	Position accuracy (e.g., 0.1mm), determines touch precision
Sampling Rate	Up to 200Hz for smooth gesture tracking
Power Consumption	Typically <100 A for mobile devices
Touch Points	Support for 5-10 point simultaneous detection
ESD Protection	8kV contact discharge immunity
Operating Temperature	-40 C to +85 C for industrial applications

5. Application Fields

Consumer Electronics: Smartphones (Apple iPhone, Samsung Galaxy), Wearables (Apple Watch)
Industrial Automation: Programmable logic controllers with HMI
Medical Equipment: Ultrasound imaging touch panels
Automotive Systems: Tesla Model S central console
Retail & POS: Square Terminal, Amazon Go checkout systems

6. Leading Manufacturers & Products

Manufacturer	Product Series	Key Features
Texas Instruments	TSC34XX	12-bit resolution, 4-wire resistive sensing
STMicroelectronics	STMPE8050	Capacitive controller with 10-touch detection
Synaptics	ClearPad 36000	Optimized for curved displays
Microchip	maXTouch T9	Low-power mode for IoT devices

7. Selection Guidelines

Key considerations include: 1) Sensor type compatibility (capacitive/resistive), 2) Required touch resolution and sampling rate, 3) Power budget constraints, 4) Electromagnetic interference (EMI) immunity requirements, 5) Host processor interface compatibility (I2C/SPI), 6) Operating environment conditions (temperature/humidity), and 7) Cost-effectiveness for target application. For example, automotive applications require AEC-Q100 certified components with extended temperature ranges.

8. Industry Trends

Future development focuses on: 1) Integration with AI algorithms for predictive touch recognition, 2) Enhanced force-sensing capabilities (4D touch), 3) Flexible and foldable display compatibility, 4) Ultra-low-power designs with wake-on-touch functionality, and 5) Advanced security features for biometric authentication. The market is projected to grow at 7.2% CAGR through 2027, driven by AR/VR and autonomous vehicle HMI demands.