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PDF LDS6120NQGI8 Data sheet ( Hoja de datos )

Número de pieza LDS6120NQGI8
Descripción Capacitive Touch Sensor IC Family
Fabricantes IDT 
Logotipo IDT Logotipo



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LDS6100 Family
PureTouch®* Capacitive Touch Sensor IC Family
FEATURES
o Up to 20 touch sensor channels
o 2ms update rate per active sensor input**
o Direct Communication Mode (DCM) for
mechanical button emulation
o Built-in Slider/Scroll Support
o Configurable hysteresis and debounce
o Touch Preference Modes
o Integrated LED drivers for visual feedback
(LDS6120/4/5/8)
o Configurable dimming
o Built-in flash and pulsate effects
o Individual LED configurability
o 1.65-5.5v supply voltage
o Low touch sensor operating power
o Full power mode (typ): <125uW***
o Optional low power mode
o On-chip automatic calibration algorithm
o SPI/I2C/SMBus-compatible serial I/F with
VDDIO
o GPIO and interrupt output
o 28 and 40-pin TQFN packages
o 28-pin SSOP also available
APPLICATIONS
o Mobile handsets, personal media pl ayers
o Portable navigation devices
o Remote controls
o Office equipment, multi-function printers
o Set top boxes
o Home appliances
o Brown goods
o Industrial controls
DESCRIPTION
The LDS6100 Family of capacitive touch controllers
enables streamlining of the human-machine interface
through the implementation of touch-based user
inputs such as touch buttons, sliders, and scroll
wheels. Employing a finely tuned sigma-delta
capacitance-to-digital converter and proprietary
noise-filtering algorithms, each device is able to
reliably sense small changes in capacitance, allowing
touch-based inputs to replace a side variety of
mechanical input types. On-chip automatic
calibration accounts for environmental changes such
as temperature, humidity, and dust and is executed
automatically.
The LDS6100 Family consists of eight products, four
(LDS6100/4/7/8) focusing exclusively on touch
functionality, with another four (LDS6120/4/6/8)
include LED drivers for integrated visual feedback
when a touch occurs. Up to 20 capacitive sensor
input pins may be supported, approximately half of
which may be optionally configured as output status
pins in Direct Communication Mode (DCM) which
allows emulation of mechanical buttons for more
seamless integration. On the four LDS6120
offerings, the other half of the sensors not
configurable as DCM outputs may be optionally
configured as LED drivers, enabling integrated visual
feedback for touch applications.
The LDS6100 Family supports a touch sensor supply
voltages from 1.65 to 5.5V. All support SPI, I2C, and
SMBus-compatible serial interfaces and offer both a
General Purpose I/O (GPIO) and VDDIO support,
enabling 1.65V to 5.5V voltage interface support.
Typical touch sensor operating power for the device
is less than 125uW***. and a LED driver supply
voltage from 3.0V to 5.5V. Package offerings include
thin form factor (0.8mm max, 0.75mm nominal) 4mm
x 4mm 28-pin and 5mm x 5mm 40-pin TQFN
packages and a 10.2mm x 5.3mm 28-pin SSOP
package.
* PureTouch is a registred trademark of IDT
** Nominal decimation rate (d=1024), per sensor input
*** 1.8V, excluding VDDIO current, which varies with VDDIO voltage, I/F type, and communication frequency
© 2009 IDT
Characteristics subject to change without notice
1
Doc. No. 6100DS, Rev. 0.1

1 page




LDS6120NQGI8 pdf
LDS6100 Family
ELECTRICAL OPERATING CHARACTERISTICS (CURRENT CONSUMPTION)
VDD1 = 1.8V, VDD2 = 3.6V (LDS612x only), VDDIO = 1.8V, TAMB = -40°C to 85°C unless otherwise specified
Parameter
Current Consumption
Full Power Mode
Sleep Mode
Shutdown, TAMB = 25°C
Shutdown
Symbol
Conditions
Related Pins
Iddfp
Iddsl
Iddsd
Iddsd
No LEDs actively
driven on LDS612x
No LEDs actively
driven on LDS612x
TAMB = 25°C
TAMB = -40°C to
+85°C
Min
Typ Max Unit
65 120 uA
17
0.5 5
uA
uA
10 uA
© 2009 IDT
Characteristics subject to change without notice
5
Doc. No. 6100 FamilyDS, Rev. 0.1

5 Page





LDS6120NQGI8 arduino
LDS6100 Family
READING DATA OVER I2C
To initiate a read operation, the master must first write the read starting address to the LDS6100 Family. The
device address (0101 100) and read/write bit (0 for initial write of starting address) is sent over the bus, followed by
two data bytes that contain the 10-bit register address to be read. The address format is identical to that used
during write operations, with only the 10 lower bits of the 16-bit address word containing address information.
The master then either ends the write operation with a STOP signal followed by initiation (START) of a read
operation, or more ideally, issues a “REPEAT START” command. In both cases, the read/write bit is set to “1” (see
Figure 9 for details of both continuations methods). In either case, the LDS6100 Family provides the MSB eight
bits of data first, followed by the LSB eight bits in the next byte.
Figure 9 : I2C-Compatible Detailed Timing Diagram
The LDS6100 Family address pointer automatically increments after each read, resulting in a continuous output of
read data until the master returns a no acknowledge (ACK signal high) and stop condition to the bus. If the address
pointer reaches its maximum value and the master continues to attempt to read from the part, the LDS6100 Family
continues to send data from the last register that was addressed.
© 2009 IDT
Characteristics subject to change without notice
11
Doc. No. 6100 FamilyDS, Rev. 0.1

11 Page







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