MAX11803 Maxim Integrated Products, MAX11803 Datasheet

MAX11803

Manufacturer Part Number

MAX11803

Description

(MAX11800 - MAX11803) Ultra-Small Resistive Touch-Screen Controllers

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX11803.pdf (56 pages)

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Part Number:

MAX11803EWC+T

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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.

19-4711; Rev 0; 7/09

Typical Operating Circuits and Pin Configurations appear

at end of data sheet.

SPI is a trademark of Motorola, Inc.

† Patents pending.

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.

Low-Power, Ultra-Small Resistive Touch-Screen

Mobile Communication

Devices

PDAs, GPS Receivers,

Personal Navigation

Devices, Media Players

Portable Instruments

________________________________________________________________ Maxim Integrated Products

General Description

POS Terminals

Handheld Games

Automotive Center

Consoles

Controllers with I

Applications

C serial bus.

♦ 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

♦ Data Filtering Provides Noise Reduction

♦ Aperture Mode† Provides Spatial Filtering

♦ Digital Processing Reduces Bus Activity and

♦ Programmable Touch-Detect Pullup Resistors

♦ Auto Power-Down Control for Low-Power

♦ 25MHz SPI Interface (MAX11800/MAX11802)

♦ 400kHz I

♦ 1.6mm x 2.1mm, 12-Pin WLP and 4mm x 4mm,

♦ Low-Power Operation

♦ ESD Protection

* 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.

MAX11800ETC+

MAX11800GTC/V+

MAX11800EWC+T*

MAX11801ETC+

MAX11801GTC/V+

MAX11801EWC+T*

MAX11802ETC+T

MAX11802EWC+T*

MAX11803ETC+T

MAX11803EWC+T*

Event Information

Interrupt Generation

Operation

12-Pin TQFN

343µW at V

888µW at V

±4kV HBM

±8kV HBM (X+, X-, Y+, Y-)

±1kV CDM

±200V MM

PART

C Interface (MAX11801/MAX11803)

= 1.7V, 34.4ksps

= 3.3V, 34.4ksps

C/SPI Interface

-40°C to +105°C

Ordering Information

-40°C to +85°C

TEMP RANGE

PIN-PACKAGE

12 TQFN-EP**

12 WLP

12 TQFN-EP**

12 WLP

12 TQFN-EP**

12 WLP

12 TQFN-EP**

12 WLP

Features

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