Datasheet

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TSC2007

FEATURES APPLICATIONS

DESCRIPTION

PENIRQ

I C

Serial

Interface

and

Control

SCL

SDA

A[0:1]

X+

X-

Y+

Y-

AUX

TEMP

Mux

VDD/REF

GND

SAR

ADC

Internal

Clock

Touch

Screen

Drivers

Interface

Preprocessing

TSC2007

www.ti.com

...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009

1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire

Micro TOUCH SCREEN CONTROLLER with I

C™ Interface

• Cellular Phones

• 4-Wire Touch Screen Interface

• PDA, GPS, and Media Players

• Single 1.2V to 3.6V Supply/Reference

• Portable Instruments

• Ratiometric Conversion

• Point-of-Sale Terminals

• Effective Throughput Rate:

• Multiscreen Touch Control Systems

– Up to 20kHz (8-Bit) or 10kHz (12-Bit)

• Preprocessing to Reduce Bus Activity

• I

C Interface Supports:

The TSC2007 is a very low-power touch screen

– Standard, Fast, and High-Speed Modes

controller designed to work with power-sensitive,

• Simple, Command-Based User Interface:

handheld applications that are based on an advanced

low-voltage processor. It works with a supply voltage

– TSC2003 Compatible

as low as 1.2V, which can be supplied by a

– 8- or 12-Bit Resolution

single-cell battery. It contains a complete, ultra-low

• On-Chip Temperature Measurement

power, 12-bit, analog-to-digital (A/D) resistive touch

screen converter, including drivers and the control

• Touch Pressure Measurement

logic to measure touch pressure.

• Digital Buffered PENIRQ

In addition to these standard features, the TSC2007

• On-Chip, Programmable PENIRQ Pull-Up

offers preprocessing of the touch screen

• Auto Power-Down Control

measurements to reduce bus loading, thus reducing

• Low Power:

the consumption of host processor resources that can

then be redirected to more critical functions.

– 32.24 µ A at 1.2V, Fast Mode, 8.2kHz Eq Rate

– 39.31 µ A at 1.8V, Fast Mode, 8.2kHz Eq Rate

The TSC2007 supports an I

C serial bus and data

transmission protocol in all three defined modes:

– 53.32 µ A at 2.7V, Fast Mode, 8.2kHz Eq Rate

standard, fast, and high-speed. It offers

• Enhanced ESD Protection:

programmable resolution of 8 or 12 bits to

– ± 8kV HBM

accommodate different screen sizes and performance

needs.

– ± 1kV CDM

– ± 25kV Air Gap Discharge

The TSC2007 is available in a 12-lead,

(1.555 ± 0.055mm) x (2.055 ± 0.055mm), 3 x 4 array,

– ± 15kV Contact Discharge

wafer chip-scale package (WCSP), and a 16-pin,

• 1.5 x 2 WCSP-12 and 5 x 6.4 TSSOP-16

TSSOP package. The TSC2007 is characterized for

Packages

the – 40 ° C to +85 ° C industrial temperature range.

U.S. Patent NO. 6246394; other patents pending.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2 I2C is a trademark of NXP Semiconductors.

3 All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (41 pages)

PAGE 1
TS TSC2007 ® C2 007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire Micro TOUCH SCREEN CONTROLLER with I2C™ Interface FEATURES APPLICATIONS • • • • • • • • • 1 23 • • • • • • • • • • • 4-Wire Touch Screen Interface Single 1.2V to 3.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 ELECTRICAL CHARACTERISTICS At TA = –40°C to +85°C, VDD = +1.2V to +3.6V, unless otherwise noted.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS (continued) At TA = –40°C to +85°C, VDD = +1.2V to +3.6V, unless otherwise noted. TSC2007 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT DIGITAL INPUT/OUTPUT Logic family CMOS VIH VIL Logic level 1.2V ≤ VDD < 1.6V 0.7 × VDD VDD + 0.3 V 1.6V ≤ VDD ≤ 3.6V 0.
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TSC2007 www.ti.com......................................................................................................................................................
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com TIMING INFORMATION SDA tSU, STA tSU, DAT tBUF tHD, STA tHD, DAT tLOW SCL tSU, STO tHIGH tHD, STA tR tF START CONDITION REPEATED START CONDITION STOP CONDITION START CONDITION Figure 1.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 TIMING REQUIREMENTS: I2C Fast Mode (SCL = 400kHz) All specifications typical at –40°C to +85°C, VDD = 1.6V, unless otherwise noted. 2-WIRE FAST MODE PARAMETERS TEST CONDITIONS MIN TYP MAX UNIT 400 kHz SCL clock frequency fSCL 0 Bus free time between a STOP and START condition tBUF 1.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com TIMING REQUIREMENTS: I2C High-Speed Mode (SCL = 3.4MHz) All specifications typical at –40°C to +85°C, VDD = 1.6V, unless otherwise noted. 2-WIRE HIGH-SPEED MODE PARAMETERS TEST CONDITIONS MIN TYP MAX UNIT 3.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 TYPICAL CHARACTERISTICS At TA = –40°C to +85°C, VDD = +1.2V to +3.6V, PD1 = PD0 = 0, Fast mode, 12-bit mode, non-continuous AUX measurement, and MAV filter enabled (see MAV Filter section), unless otherwise noted.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (continued) At TA = –40°C to +85°C, VDD = +1.2V to +3.6V, PD1 = PD0 = 0, Fast mode, 12-bit mode, non-continuous AUX measurement, and MAV filter enabled (see MAV Filter section), unless otherwise noted.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 TYPICAL CHARACTERISTICS (continued) At TA = –40°C to +85°C, VDD = +1.2V to +3.6V, PD1 = PD0 = 0, Fast mode, 12-bit mode, non-continuous AUX measurement, and MAV filter enabled (see MAV Filter section), unless otherwise noted.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com OVERVIEW The TSC2007 is an analog interface circuit for a human interface touch screen device. All peripheral functions are controlled through the command byte and onboard state machines.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 TOUCH SCREEN OPERATION A resistive touch screen operates by applying a voltage across a resistor network and measuring the change in resistance at a given point on the matrix where the screen is touched by an input (stylus, pen, or finger).
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com The second method requires knowing both the X-plate and Y-plate resistance, measurement of X-position and Y-position, and Z1.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 INTERNAL TEMPERATURE SENSOR In some applications, such as battery recharging, an ambient temperature measurement is required. The temperature measurement technique used in the TSC2007 relies on the characteristics of a semiconductor junction operating at a fixed current level.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com ANALOG-TO-DIGITAL CONVERTER Figure 23 shows the analog inputs of the TSC2007. The analog inputs (X, Y, and Z touch panel coordinates, chip temperature and auxiliary inputs) are provided via a multiplexer to the Successive Approximation Register (SAR) A/D converter.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 Reference The TSC2007 uses an external voltage reference that is applied to the VDD/REF pin. The upper reference voltage range is the same as the supply voltage range, which allows for simple, 1.2V to 3.6V, single-supply operation of the chip.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com Touch Screen Settling In some applications, external capacitors may be required across the touch screen to filter noise picked up by the touch screen (that is, noise generated by the LCD panel or backlight circuitry).
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 Touch Detect The PENIRQ can be used as an interrupt to the host. RIRQ is an internal pull-up resistor with a programmable value of either 50kΩ (default) or 90kΩ. Write command '1011' (setup command) followed by data '0001' sets the pull-up to 90kΩ.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com Preprocessing The TSC2007 has a combined MAV filter (median value filter and averaging filter). MAV Filter If the acquired signal source is noisy because of the digital switching circuit, it may necessary to evaluate the data without noise.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 I2C INTERFACE The TSC2007 supports the I2C serial bus and data transmission protocol in all three defined modes: standard, fast, and high-speed. A device that sends data onto the bus is defined as a transmitter, and a device receiving data as a receiver.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com Figure 29 details how data transfer is accomplished on the I2C bus. Depending upon the state of the R/W bit, two types of data transfer are possible: 1. Data transfer from a master transmitter to a slave receiver. The first byte transmitted by the master is the slave address.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 I2C High-Speed Mode (Hs Mode) The TSC2007 can operate with high-speed I2C masters. To do so, the pull-up resistor on SCL must be changed to an active pull-up, as recommended in the I2C specification.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com DIGITAL INTERFACE ADDRESS BYTE The TSC2007 has a 7-bit slave address word. The first five bits (MSBs) of the slave address are factory-preset to comply with the I2C standard for A/D converters and are always set at '10010'.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 When the TSC2007 powers up, the power-down bits must be written to ensure that the device is placed into the mode that achieves the lowest power.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com START A CONVERTER FUNCTION/WRITE CYCLE A conversion/write cycle begins when the master issues the address byte containing the slave address of the TSC2007, with the eighth bit equal to a 0 (R/W = 0), as shown in Table 1.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 READ A CONVERSION/READ CYCLE For best performance, the I2C bus should remain in an idle state while an A/D conversion is taking place. This idling prevents digital clock noise from affecting the bit decisions being made by the TSC2007.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com THROUGHPUT RATE AND I2C BUS TRAFFIC Although the internal A/D converter has a sample rate of up to 200kSPS, the throughput presented at the bus is much lower. The rate is reduced because preprocessing manages the redundant work of filtering out noise.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 Table 6. Effective and Equivalent Throughput Rates SUPPLY VOLTAGE I C BUS SPEED (fSCL) RESOLUTION TSC CONVERSION CYCLE TIME (µs) 100kHz Standard 8-bit 433.6 2.31 16.14 40 127 3780 264.6 12-bit 568.7 1.76 12.31 49 148 1880 531.9 8-bit 133.6 7.49 52.40 40 127 3780 264.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009 .................................................................................................................................................................................................................................................. www.ti.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 POWER-ON RESET (POR) During TSC2007 power-up, an internal power-on reset (POR) is automatically implemented. The POR brings the TSC to the default working condition, and checks the A0 and A1 pins for the two LSBs of the I2C address.
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.com LAYOUT The following layout suggestions should obtain optimum performance from the TSC2007. Keep in mind that many portable applications have conflicting requirements for power, cost, size, and weight.
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TSC2007 www.ti.com...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009 Revision History Changes from Original (March 2007) to Revision A ....................................................................................................... Page • • • • • • • • • • • • • Added IEC discharge information to Absolute Maximum Ratings table ...............................
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TSC2007 SBAS405A – MARCH 2007 – REVISED MARCH 2009...................................................................................................................................................... www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 28-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TSC2007IPWR TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 TSC2007IYZGR DSBGA YZG 12 3000 180.0 8.4 1.75 2.25 0.81 4.0 8.0 Q1 TSC2007IYZGT DSBGA YZG 12 250 180.0 8.4 1.75 2.25 0.81 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 28-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TSC2007IPWR TSSOP PW 16 2000 367.0 367.0 35.0 TSC2007IYZGR DSBGA YZG 12 3000 182.0 182.0 17.0 TSC2007IYZGT DSBGA YZG 12 250 182.0 182.0 17.
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