MAX11803

Manufacturer Part NumberMAX11803
Description(MAX11800 - MAX11803) Ultra-Small Resistive Touch-Screen Controllers
ManufacturerMaxim Integrated Products
MAX11803 datasheet
 
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19-4711; Rev 0; 7/09
www.DataSheet4U.com
Low-Power, Ultra-Small Resistive Touch-Screen
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 I
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.
Mobile Communication
Devices
PDAs, GPS Receivers,
Personal Navigation
Devices, Media Players
Portable Instruments
Typical Operating Circuits and Pin Configurations appear
at end of data sheet.
SPI is a trademark of Motorola, Inc.
† Patents pending.
________________________________________________________________ Maxim Integrated Products
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.
Controllers with I
♦ 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 I
♦ 1.6mm x 2.1mm, 12-Pin WLP and 4mm x 4mm,
12-Pin TQFN
♦ Low-Power Operation
343µW at V
888µW at V
♦ ESD Protection
±4kV HBM
±8kV HBM (X+, X-, Y+, Y-)
±1kV CDM
±200V MM
2
C serial bus.
MAX11800ETC+
MAX11800GTC/V+
MAX11800EWC+T*
Applications
MAX11801ETC+
POS Terminals
MAX11801GTC/V+
MAX11801EWC+T*
Handheld Games
MAX11802ETC+T
Automotive Center
MAX11802EWC+T*
Consoles
MAX11803ETC+T
MAX11803EWC+T*
* 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.
2
C/SPI Interface
Features
2
C Interface (MAX11801/MAX11803)
= 1.7V, 34.4ksps
DD
= 3.3V, 34.4ksps
DD
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
-40°C to +85°C
12 TQFN-EP**
-40°C to +105°C
12 TQFN-EP**
-40°C to +85°C
12 WLP
-40°C to +85°C
12 TQFN-EP**
-40°C to +105°C
12 TQFN-EP**
-40°C to +85°C
12 WLP
-40°C to +85°C
12 TQFN-EP**
-40°C to +85°C
12 WLP
-40°C to +85°C
12 TQFN-EP**
-40°C to +85°C
12 WLP
1