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PDF SX8658 Data sheet ( Hoja de datos )
| Número de pieza | SX8658 | |
| Descripción | Haptics Enabled 4/5-Wire Resistive Touchscreen Controller | |
| Fabricantes | Semtech | |
| Logotipo |  |
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SX8657/SX8658
Haptics Enabled 4/5-Wire
Resistive Touchscreen Controller with Proximity Sensing
ADVANCED COMMUNICATIONS & SENSING
GENERAL DESCRIPTION
The SX8657 and SX8658 belong to a family of high
performance haptics enabled 4/5-wire resistive touch
screen controller with proximity detection, optimized
for hand held applications such as mobile phones,
portable music players, game machines, point-of-
sales terminal and other consumer and industrial
applications. They feature a wide input supply range
from 2.3V to 3.6V.
The controller computes touch screen X-Y
coordinates and touch pressure with a precision, low
power 12-bit analog-digital converter. On-chip data
averaging processing algorithms can be activated to
reduce host activity and suppress system noise. The
processing core features low power modes which
intelligently minimize current in operation as well as in
automatic shut-down.
A capacitive proximity detection circuit has been
integrated into the SX8657 to enable host controlled
power management for battery applications. Proximity
detection above 5 cm is possible using either the
resistive touch screen as the sensor or with a single
conductive plate, with communication to the host via
the serial interface.
The SX8657 and SX8658 also integrate a haptics
motor driver for Linear Resonant Actuator (LRA) and
Eccentric Rotating Mass (ERM) micro motors with up
to 250mA drive current. Haptics control can be
performed using either an external PWM signal or the
I2C serial interface, providing simple host interfacing
and minimizing its I/O requirement. The SX8657/58
supports Immersion TouchSense® 3000 haptic
control software for high quality touch feedback.
Integrated very high ESD protection, of up to ±15kV
on display inputs not only saves cost and board area,
but also increases application reliability.
The three devices have an ambient operating
temperature range of -40°C to +85°C, and are offere d
in both a 4mm x 4mm, 20-lead QFN package and
2.07mm x 2.07mm 19-lead CSP package for space-
conscious applications.
TYPICAL APPLICATIONS
• Game Machines, Portable Music Players
• Mobile Phones
• DSC, DVR, Phones
• POS/POI Terminals
• Touch-Screen Monitors
ORDERING INFORMATION
Part Number
SX8657IWLTRT
SX8657ICSTRT
SX8658IWLTRT
SX8658ICSTRT
SX8654EVK
Package
QFN-20
WLCSP-19
QFN-20
WLCSP-19
Evaluation Kit
Marking
RD2C
RC4B
-
KEY PRODUCT FEATURES
• Low Voltage Operation
2.3V to 3.6V Supply
Integrated Low Drop Out (LDO) Regulator
• Low Power Consumption
[email protected] 8ksps (ESR)
0.4uA Shut-Down Current
• 4/5-Wire Touchscreen Interface
Precision, Ratiometric 12-bit ADC
Up to 5000 (X-Y) coordinates/second (c/s)
Programmable Digital Filtering/Averaging
Touch Pressure Measurement (4-Wire)
Programmable Operating Mode (Manual,
Pen Detect, Pen Trigger)
• Capacitive Proximity Sensing (SX8657)
No Additional Components Required
Uses Resistive Touchscreen or a Simple
Conductive Area as the Sensor
>5 cm Detection Distance
8uA @ 200ms Scan Period
Fully Programmable (Sensitivity, etc)
• Haptics Driver for LRA and ERM (SX8657/58)
Supports Immersion TouchSense® 3000
haptic control software
Haptics Waveform Generation Control (I2C
or PWM Input)
Short Circuit Protection
Early Warning and Over-Temperature
Monitoring and Protection
• 400kHz I2C Serial Interface
• Several Host Operating Modes Available
Maskable Interrupt Output (NIRQ)
Real-time Events Monitoring (AUX1-3)
Polling (I2C)
• Hardware, Software, and Power-On Reset
• -40°C to +85°C Operating Temperature Range
• 15kV HBM & IEC ESD Protection
• Small Footprint Packages
• Pb & Halogen Free, RoHS/WEEE compliant
M
HAPTICS DRIVER
TOUCHSCREEN
CONTROL
SX8657
NRST
Host
I2C
Controller
NIRQ
Rev 1 – 25th July 2011
PROXIMITY SENSING
1
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1 page  
SX8657/SX8658
Haptics Enabled 4/5-Wire
Resistive Touchscreen Controller with Proximity Sensing
ADVANCED COMMUNICATIONS & SENSING
1.2 Pin Diagrams
1.2.1 QFN Package
1.2.2 CSP Package
Figure 3 – Pin Diagram – QFN
Rev 1 – 25th July 2011
Figure 4 – Pin Diagram - CSP
5
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5 Page 
SX8657/SX8658
Haptics Enabled 4/5-Wire
Resistive Touchscreen Controller with Proximity Sensing
ADVANCED COMMUNICATIONS & SENSING
3 TYPICAL OPERATING CHARACTERISTICS
Conditions as defined in §2.3, TA = +25°C, VDD=VDDM=3.3V unless otherwise specified.
IDD_OFF vs VDD vs TEMP
IDD_WAIT vs VDD vs TOUCHRATE
4.00E-07
8
3.80E-07
3.60E-07
3.40E-07
3.20E-07
3.00E-07
2.80E-07
25°C
85°C
-40°C
7
6
5
4
3
2.60E-07
2.40E-07
2.20E-07
2.00E-07
2.3 2.5 2.7 2.9 3.1 3.3 3.5
VDD(V)
2
1
0
2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
V DD( V )
IDD_PROX vs SCANPERIOD vs SENSITIVITY
IDD_HAPT vs VDD vs TEMP
80 0.0002
0.00019
70
0.00018
60
0.00017
50
0.00016
0(Min)
40 5 0.00015
7(Max)
0.00014
30
0.00013
20
0.00012
10
0.00011
0
0 100 200 300 400 500 600 700 800
SCANPERIOD(m s)
0.0001
2.3 2.5 2.7 2.9 3.1 3.3 3.5
VDD(V)
5.00E-08
MIDD_OFF vs MVDD vs TEMP
4.50E-08
4.00E-08
3.50E-08
3.00E-08
2.50E-08
2.00E-08
1.50E-08
1.00E-08
5.00E-09
0.00E+00
2.3 2.5 2.7 2.9 3.1 3.3 3.5
MVDD(V)
1.00E-05
MIDD_SQUELCH vs MVDD vs TEMP
9.00E-06
25°C
85°C
-40°C
8.00E-06
7.00E-06
6.00E-06
5.00E-06
2.3 2.5 2.7 2.9 3.1 3.3 3.5
MVDD(V)
VERR vs GAIN vs MVDD
0.08
10cps
80cps
2000cps
5000cps
25°C
85°C
-40°C
25°C
85°C
-40°C
0.07
0.06
VOFF(V)
0.05
0.04
2.3V
3.3V
3.6V
0.03
0.02
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
GAIN
Rev 1 – 25th July 2011
11
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet SX8658.PDF ] | |
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