Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsData collecting ICsData acquisition IC - Touchscreen controller 12 Bit 1x TSC input QFN 20

FEATURES APPLICATIONS

DESCRIPTION

Pre-Processing

PINTDAV

SPI

Serial

Interface

and

Control

SCLK

SDI

RESET

SDO

VREF

X+

X-

Y+

Y-

AUX

TEMP

Mux

PENIRQ

DAV

SAR

ADC

Internal

Clock

Touch

Screen

Drivers

Interface

TSC2006

www.ti.com

......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009

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

TOUCH SCREEN CONTROLLER with SPI™ Interface

• Personal Digital Assistants

• 4-Wire Touch Screen Interface

• Cellular Phones

• Ratiometric Conversion

• Portable Instruments

• Single 1.2V to 3.6V Supply

• Point-of-Sale Terminals

• Preprocessing to Reduce Bus Activity

• MP3 Players, Pagers

• High-Speed SPI-Compatible Interface

• Multiscreen Touch Control Systems

• Internal Detection of Screen Touch

• Register-Based Programmable:

– 10-Bit or 12-Bit Resolution

The TSC2006 is a very low-power touch screen

– Sampling Rates

controller designed to work with power-sensitive,

handheld applications that are based on advanced

– System Timing

low-voltage processors. It works with a supply voltage

• On-Chip Temperature Measurement

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

• Touch Pressure Measurement

single-cell battery. It contains a complete,

• Auto Power-Down Control

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

touch screen converter, including drivers and the

• Low Power:

control logic to measure touch pressure.

– 707 µ W at 1.8V, 50SSPS

In addition to these standard features, the TSC2006

– 544 µ W at 1.6V, 50SSPS

offers preprocessing of the touch screen

– 280 µ W at 1.2V, 50SSPS

measurements to reduce bus loading, thus reducing

– 69 µ W at 1.6V, 8.2kSPS Eq. Rate

the consumption of host processor resources that can

then be redirected to more critical functions.

– 43 µ W 1.2V, 8.2kSPS Eq. Rate

The TSC2006 supports an SPI-compatible serial bus

• Enhanced ESD Protection:

up to 25MHz. It offers programmable resolution of 10

– ± 8kV HBM

or 12 bits to accommodate different screen sizes and

– ± 1kV CDM

performance needs.

– ± 25kV Air Gap Discharge

The TSC2006 is available in a miniature 20-lead,

– ± 12kV Contact Discharge

4 × 4 QFN package, and is characterized for the

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

• 4 × 4 QFN-20 and 0.4mm 4 × 4 XTQFN-20

(1)

Packages

(1)

XTQFN package available Q4, 2009.

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 SPI is a trademark of Motorola, Inc.

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 (49 pages)

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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire TOUCH SCREEN CONTROLLER with SPI™ Interface FEATURES APPLICATIONS • • • • • • • • • • • • • 1 23 • • • • • • (1) 4-Wire Touch Screen Interface Ratiometric Conversion Single 1.2V to 3.
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TSC2006 SBAS415C – JUNE 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.
PAGE 3
TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 ELECTRICAL CHARACTERISTICS At TA = –40°C to +85°C, SNSVDD = VREF = +1.2V to +3.6V, I/OVDD (1) = +1.2V to +3.6V, unless otherwise noted.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS (continued) At TA = –40°C to +85°C, SNSVDD = VREF = +1.2V to +3.6V, I/OVDD = +1.2V to +3.6V, unless otherwise noted. TSC2006 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT DIGITAL INPUT/OUTPUT Logic family CMOS VIH VIL Logic level IIL 1.2V ≤ I/OVDD < 1.6V 0.
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TSC2006 www.ti.com .........................................................................................................................................................
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com TIMING INFORMATION The TSC2006 supports SPI programming in mode CPOL = 0 and CPHA = 0. The falling edge of SCLK is used to change output (MISO) data and the rising edge is used to latch input (MOSI) data.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 TYPICAL CHARACTERISTICS At TA = –40°C to +85°C, SNSVDD = VREF = +1.2V to +3.6V, I/OVDD = +1.2V to +3.6V, fADC = fOSC/2, fSCLK = 10MHz, 12-bit mode, and non-continuous AUX measurement, unless otherwise noted. CHANGE IN OFFSET vs TEMPERATURE CHANGE IN GAIN vs TEMPERATURE 2.0 2.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (continued) At TA = –40°C to +85°C, SNSVDD = VREF = +1.2V to +3.6V, I/OVDD = +1.2V to +3.6V, fADC = fOSC/2, fSCLK = 10MHz, 12-bit mode, and non-continuous AUX measurement, unless otherwise noted.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 TYPICAL CHARACTERISTICS (continued) At TA = –40°C to +85°C, SNSVDD = VREF = +1.2V to +3.6V, I/OVDD = +1.2V to +3.6V, fADC = fOSC/2, fSCLK = 10MHz, 12-bit mode, and non-continuous AUX measurement, unless otherwise noted.
PAGE 10
TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (continued) At TA = –40°C to +85°C, SNSVDD = VREF = +1.2V to +3.6V, I/OVDD = +1.2V to +3.6V, fADC = fOSC/2, fSCLK = 10MHz, 12-bit mode, and non-continuous AUX measurement, unless otherwise noted.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 OVERVIEW The TSC2006 is an analog interface circuit for a human interface touch screen device. A register-based architecture eases integration with microprocessor-based systems through a standard SPI bus. All peripheral functions are controlled through the registers and onboard state machines.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com 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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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 Measure X-Position X+ Y+ Touch X-Position Y- X- Measure Z1-Position Y+ X+ Touch Z1-Position X- Y- Y+ X+ Touch Z2-Position X- YMeasure Z2-Position Figure 25.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com INTERNAL TEMPERATURE SENSOR In some applications, such as battery recharging, an ambient temperature measurement is required. The temperature measurement technique used in the TSC2006 relies on the characteristics of a semiconductor junction operating at a fixed current level.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 ANALOG-TO-DIGITAL CONVERTER Figure 27 shows the analog inputs of the TSC2006. 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) Analog-to-Digital (A/D) converter.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com Data Format The TSC2006 output data are in Straight Binary format as shown in Figure 28. This figure shows the ideal output code for the given input voltage and does not include the effects of offset, gain, or noise. FS = Full-Scale Voltage = VREF(1) 1LSB = VREF(1)/4096 1LSB 11...
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 Touch Detect PINTDAV can be programmed to generate an interrupt to the host. Figure 29 details an example for the Y-position measurement. While in the power-down mode, the Y– driver is on and connected to GND. The internal pen-touch signal depends on whether or not the X+ input is driven low.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com Preprocessing The TSC2006 offers an array of powerful preprocessing operations that reduce unnecessary traffic on the bus and reduce host processor loading.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 NOTE: The default setting for MAVF is MVF (median value filter with averaging bypassed) for any invalid configuration. For example, if (M1, M0, W1, W0) = (1,0,1,0), the MAVF performs as it was configured for (1,0,0,0), median filter only with filter size = 7 and no averaging.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com DIGITAL INTERFACE The TSC2006 communicates through a standard SPI bus. The SPI allows full-duplex, synchronous, serial communication between a host processor (the master) and peripheral devices (slaves). The SPI master generates the synchronizing clock and initiates transmissions.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 Table 7. Converter Function Select C3 C2 C1 C0 FUNCTION 0 0 0 0 Touch screen scan function: X, Y, Z1, and Z2 coordinates converted and the results returned to X, Y, Z1, and Z2 data registers. Scan continues until either the pen is lifted or a stop bit is sent.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com Touch Sensor Short-Circuit Test If the TBM bits of CFR1 detailed in Table 20 are all set to '1', a short-circuit in the touch sensor can be detected. C3-C0 = 1011: Reserved. C3-C0 = 1100: PINTDAV = 0 during this short-circuit test.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 Table 10.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com REGISTER ACCESS (Control Byte 0 with R/W Bit) Control byte 0, beginning with D7 = 0, is used to access the internal registers. This control byte uses the last bit, D0, to control the flow of data.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 COMMUNICATION PROTOCOL The TSC2006 is controlled entirely by registers. Reading and writing to these registers are accomplished by the use of Control Byte 0, which includes a 4-bit address plus one read/write TSC register control bit.
PAGE 26
TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com CL1, CL0—Conversion clock control. These two bits specify the clock rate that the A/D converter uses to perform conversion, as shown in Table 15. These bits are the same whether reading or writing. Table 15. A/D Converter Conversion Clock Control (1) CL1 CL0 FUNCTION 0 0 fADC = fOSC/1.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 Table 18. Sense Time Selection SNS2 SNS1 SNS0 SENSE TIME (tSNS) 0 0 0 32µs 0 0 1 96µs 0 1 0 544µs 0 1 1 608µs 1 0 0 2.080ms 1 0 1 2.144ms 1 1 0 2.592ms 1 1 1 2.656ms DTW—Detection of pen touch in wait (patent pending).
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com BTD2-BTD0—Batch Time Delay mode. These are the selection bits that specify the delay before a sample/conversion scan cycle is triggered. When it is set, Batch Time Delay mode uses a set of timers to automatically trigger a sequence of sample-and-conversion events.
PAGE 29
TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 Configuration Register 2 Configuration register 2 (CFR2) defines the preprocessor configuration. Table 22.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com Converter Function Select Register The Converter Function Select (CFN) register reflects the converter function select status. Table 25.
PAGE 31
TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 DATA REGISTERS The data registers of the TSC2006 hold data results from conversions. All data registers default to 0000h upon device reset. X, Y, Z1, Z2, AUX, TEMP1 and TEMP2 REGISTERS The results of all A/D conversions are placed in the appropriate data registers, as described in Table 10.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com REGISTER RESET There are three way to reset the TSC2006. First, at power-on, a power good signal generates a prolonged reset pulse internally to all registers.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 THEORY OF OPERATION TOUCH SCREEN MEASUREMENTS As noted previously in the discussion of the A/D converter, several operating modes can be used that allow great flexibility for the host processor. This section examines these different modes.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com Table 31.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 If the pressure of the touch is also to be measured, the process continues in the same way, but measuring the Z1 and Z2 values instead, and storing the results in temporary registers.
PAGE 36
TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com Conversion Controlled by TSC2006 Initiated by Host (TSMode 2) In TSMode 2, the TSC2006 detects when the touch panel is touched and causes the internal Pen-Touch signal to activate, which lowers the PINTDAV output if it is programmed as PENIRQ.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 Conversion Controlled by Host (TSMode 3) In TSMode 3, the TSC2006 detects when the touch panel is touched and causes the internal Pen-Touch signal to be active, which lowers the PINTDAV output if it is programmed as PENIRQ. The host recognizes the interrupt request.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.
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TSC2006 www.ti.com .........................................................................................................................................................
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com AUXILIARY AND TEMPERATURE MEASUREMENT The TSC2006 can measure the voltage from the auxiliary input (AUX) and from the internal temperature sensor.
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TSC2006 www.ti.com ......................................................................................................................................................... SBAS415C – JUNE 2007 – REVISED MARCH 2009 LAYOUT The following layout suggestions should obtain optimum performance from the TSC2006. Keep in mind that many portable applications have conflicting requirements for power, cost, size, and weight.
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TSC2006 SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision B (March 2008) to Revision C ..................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 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 TSC2006IRTJR QFN RTJ 20 3000 330.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 TSC2006IRTJT QFN RTJ 20 250 180.0 12.4 4.25 4.25 1.15 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TSC2006IRTJR QFN RTJ 20 3000 367.0 367.0 35.0 TSC2006IRTJT QFN RTJ 20 250 210.0 185.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.