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PDF MAX11802 Data sheet ( Hoja de datos )
| Número de pieza | MAX11802 | |
| Descripción | (MAX11800 - MAX11803) Ultra-Small Resistive Touch-Screen Controllers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX11802 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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19-4711; Rev 0; 7/09
www.DataSheet4U.com
Low-Power, Ultra-Small Resistive Touch-Screen
Controllers with I2C/SPI Interface
General Description
The MAX11800–MAX11803 low-power touch-screen con-
trollers operate from a single supply of 1.70V to 3.6V, tar-
geting power-sensitive applications such as handheld
equipment. The devices contain a 12-bit SAR ADC and a
multiplexer to interface with a resistive touch-screen
panel. A digital serial interface provides communications.
The MAX11800–MAX11803 include digital preprocessing
of the touch-screen measurements, reducing bus loading
and application-processor resource requirements. The
included smart interrupt function generator greatly
reduces the frequency of interrupt servicing to the
devices. The MAX11800–MAX11803 enter low-power
modes automatically between conversions to save power,
making the devices ideal for portable applications.
The MAX11800/MAX11801 offer two modes of operation:
direct and autonomous. Direct mode allows the applica-
tion processor to control all touch-screen controller activ-
ity. Autonomous mode allows the MAX11800/MAX11801
to control touch-screen activity, thereby freeing the
application processor to perform other functions. In
autonomous mode, the devices periodically scan the
touch screen for touch events without requiring host-
processor intervention. This can be used to reduce sys-
tem power consumption. An on-chip FIFO is used during
autonomous mode to store results and increase effective
data throughput and lower system power.
The MAX11800–MAX11803 support data-tagging,
which records the type of measurement performed; X,
Y, Z1, or Z2, and the type of touch event; initial touch,
continuing touch, or touch release.
The MAX11800/MAX11802 support the SPI™ serial bus.
The MAX11801/MAX11803 support the I2C serial bus.
The MAX11800–MAX11803 are available in 12-pin TQFN
and 12-pin WLP packages, and are specified over the
-40°C to +85°C (extended) and -40°C to +105°C (auto-
motive) temperature ranges.
Applications
Mobile Communication
Devices
PDAs, GPS Receivers,
Personal Navigation
Devices, Media Players
POS Terminals
Handheld Games
Automotive Center
Consoles
Portable Instruments
Typical Operating Circuits and Pin Configurations appear
at end of data sheet.
SPI is a trademark of Motorola, Inc.
†Patents pending.
Features
♦ 4-Wire Touch-Screen Interface
♦ X/Y Coordinate and Touch Pressure Measurement
♦ Ratiometric Measurement
♦ 12-Bit SAR ADC
♦ Single 1.7V to 3.6V Supply
♦ Two Operating Modes—Direct and Autonomous
♦ Data Tagging Provides Measurement and Touch
Event Information
♦ Data Filtering Provides Noise Reduction
♦ Aperture Mode† Provides Spatial Filtering
♦ Digital Processing Reduces Bus Activity and
Interrupt Generation
♦ Programmable Touch-Detect Pullup Resistors
♦ Auto Power-Down Control for Low-Power
Operation
♦ 25MHz SPI Interface (MAX11800/MAX11802)
♦ 400kHz I2C Interface (MAX11801/MAX11803)
♦ 1.6mm x 2.1mm, 12-Pin WLP and 4mm x 4mm,
12-Pin TQFN
♦ Low-Power Operation
343µW at VDD = 1.7V, 34.4ksps
888µW at VDD = 3.3V, 34.4ksps
♦ ESD Protection
±4kV HBM
±8kV HBM (X+, X-, Y+, Y-)
±1kV CDM
±200V MM
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX11800ETC+
-40°C to +85°C 12 TQFN-EP**
MAX11800GTC/V+ -40°C to +105°C 12 TQFN-EP**
MAX11800EWC+T* -40°C to +85°C 12 WLP
MAX11801ETC+
-40°C to +85°C 12 TQFN-EP**
MAX11801GTC/V+ -40°C to +105°C 12 TQFN-EP**
MAX11801EWC+T* -40°C to +85°C 12 WLP
MAX11802ETC+T
-40°C to +85°C 12 TQFN-EP**
MAX11802EWC+T* -40°C to +85°C 12 WLP
MAX11803ETC+T
-40°C to +85°C 12 TQFN-EP**
MAX11803EWC+T* -40°C to +85°C 12 WLP
*Future product—contact factory for availability.
**EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
/V denotes an automotive qualified part.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
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Low-Power, Ultra-Small Resistive Touch-Screen
Controllers with I2C/SPI Interface
LIST OF TABLES
Table 1. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Table 2. Operating Modes, Conditions, and Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Table 3. Summary of Physical Panel Settings for Supported Measurement Types . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Table 4. Median Averaging Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Table 5. Data Word Structure (All Direct Conversion Modes) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Table 6. Measurement and Event Tags (Continuous Interrupt Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Table 7. Measurement and Event Tags (Edge Interrupt Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Table 8. Panel Setup Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Table 9. Panel Measurement Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Table 10. FIFO Data Block Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Table 11. FIFO Data Word Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Table 12. FIFO Data Measurement Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Table 13. FIFO Event Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Table 14. Readback and FIFO Contents with Aperture Mode Enabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Table 15. Readback and FIFO Contents with Aperture Mode Disabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Table 16. SPI Command and Data Format: 8 Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Table 17. I2C Command and Data Format: 8 Bits Plus ACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Table 18. Status and Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Table 19. FIFO Data Readback Command (Autonomous Mode Only––MAX11800/MAX11801) . . . . . . . . . . . . . . . .45
Table 20. Data Readback Commands (Direct Mode Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Table 21. I2C Readback Register Settings Following Conversion Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Table 22. Measurement Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
_______________________________________________________________________________________ 5
5 Page 
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Low-Power, Ultra-Small Resistive Touch-Screen
Controllers with I2C/SPI Interface
tCSH0
tDS
tDH
tCP
tCSS0
CS
tCH
tCL
CLK 0 1
89
tSCH1
tCSW
tCSS1
16
DIN X A6 A5 A4 A3 A2 A1 A0 W D7 D6 D5 D4 D3 D2 D1 D0
DOUT
CS
HIGH-Z
SPI WRITE OPERATION
tDS
tCSS0
tDH
tCP
tCL
tCH
tDOE
tDO1
tDOH
tDO0
CLK 1
89
16
DIN X A6 A5 A4 A3 A2 A1 A0 R X X X X X X X X
DOUT
HIGH-Z
SPI READ OPERATION
D7 D6 D5 D4 D3 D2 D1 D0 HIGH-Z
Figure 2. SPI Timing Diagram
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX11802.PDF ] | |
Hoja de datos destacado
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