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PDF TSC2004 Data sheet ( Hoja de datos )
| Número de pieza | TSC2004 | |
| Descripción | 4-Wire TOUCH SCREEN CONTROLLER | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TSC2004 (archivo pdf) en la parte inferior de esta página. Total 54 Páginas | ||
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BurrĆBrown Products
from Texas Instruments
TSC2004 ®
TSC2004
SBAS408A – JUNE 2007 – REVISED AUGUST 2007
1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire
TOUCH SCREEN CONTROLLER with I2C™ Interface
FEATURES
• 4-Wire Touch Screen Interface
• Ratiometric Conversion
• Single 1.2V to 3.6V Supply
• Preprocessing to Reduce Bus Activity
• High-Speed I2C-Compatible Interface
• Internal Detection of Screen Touch
• Register-Based Programmable:
– 10-Bit or 12-Bit Resolution
– Sampling Rates
– System Timing
• On-Chip Temperature Measurement
• Touch Pressure Measurement
• Auto Power-Down Control
• Low Power:
– 760μW at 1.8V, 50SSPS
– 580μW at 1.6V, 50SSPS
– 285μW at 1.2V, 50SSPS
– 74μW at 1.6V, 8.2kSPS Eq. Rate
– 47μW at 1.2V, 8.2kSPS Eq. Rate
• Enhanced ESD Protection:
– ±6kV HBM
– ±1kV CDM
– Target ±18kV Air Gap Discharge
– Target ±12kV Contact Discharge
• 2.5 x 2.5 WCSP-18 and 4 x 4 QFN-20 Packages
U.S. Patent NO. 6246394; other patents pending.
APPLICATIONS
• Cellular Phones
• Portable Instruments
• MP3 Players, Pagers
• Multiscreen Touch Control
DESCRIPTION
The TSC2004 is a very low-power touch screen
controller designed to work with power-sensitive,
handheld applications that are based on an
advanced low-voltage processor. It works with a
supply voltage as low as 1.2V, which can be
supplied by a single-cell battery. It contains a
complete, ultra-low power, 12-bit, analog-to-digital
(A/D) resistive touch screen converter, including
drivers and the control logic to measure touch
pressure.
In addition to these standard features, the TSC2004
offers preprocessing of the touch screen
measurements to reduce bus loading, thus reducing
the consumption of host processor resources that
can then be redirected to more critical functions.
The TSC2004 supports an I2C serial bus and data
transmission protocol in all three defined modes:
standard, fast, and high-speed. It offers
programmable resolution of 10 or 12 bits to
accommodate different screen sizes and
performance needs.
The TSC2004 is available in a miniature, 18-lead,
5 x 5 array, (2.554 ±0.54)mm x (2.554 ±0.54)mm
wafer chip-scale package (WCSP), and a 20-pin, 4 x
4 QFN package. Both packages are characterized
for the –40°C to +85°C industrial temperature range.
VREF
X+
X-
Y+
Y-
AUX
Touch
Screen
Drivers
Interface
TEMP
Mux
SAR
ADC
Internal
Clock
PENIRQ
DAV
I2C
Serial
Interface
and
Control
PINTDAV
SCL
SDA
AD0
AD1
RESET
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
I2C is a trademark of NXP Semiconductors.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated
1 page  
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TSC2004
www.ti.com
RTJ PACKAGE(1)
QFN-20
(TOP VIEW)
PIN CONFIGURATION
SBAS408A – JUNE 2007 – REVISED AUGUST 2007
YZK PACKAGE
WCSP-18
(TOP VIEW, SOLDER BUMPS ON BOTTOM SIDE)
AGND VREF SNSVDD X+
5
Y+
15 14 13 12 11
X- 16
Y- 17
SNSGND 18
NC 19
AD0 20
TSC2004
Thermal Pad
10 AGND
9 AUX
8 NC
7 I/OVDD
6 DGND
12345
AUX
4
NC
SUBGND X-
I/OVDD NC NC NC
3
Y-
DGND AD1 NC NC SNSGND
2
PINTDAV RESET
1
SCL
SDA
AD0
AB
CD
E
Columns
(1) The thermal pad is internally connected to
SUBGND. The thermal pad can be
connected to the analog ground or left
floating. Keep the thermal pad separate
from the digital ground, if possible.
(FRONT VIEW)
PIN ASSIGNMENTS
PIN NO.
QFN WCSP
PIN
NAME
I/O A/D DESCRIPTION
1
D1
SDA
I/O D Serial data I/O
2 C1 SCL I D Serial clock.
3
B2
AD1
I D Address input bit 1
4 A1 PINTDAV O D Interrupt output. Data available or PENIRQ, depending on setting. Pin polarity with active low.
5 B1 RESET I D System reset. All register values reset to default values.
6 A2 DGND
Digital ground
7 A3 I/OVDD
Digital I/O interface voltage
8, 19
B3, B4,
C2, C3,
D2, D3
NC
No internal connection, but solder bumps are populated. These pins may be connected to analog ground
for mechanical stability.
9
A4
AUX
I A Auxiliary channel input
10 A5 AGND
Analog ground
11
B5
VREF
I A External reference input
12 C5 SNSVDD
Power supply for sensor drivers and other analog blocks.
13 D5 X+ I A X+ channel input
14 E5
Y+ I A Y+ channel input
15 D4 SUBGND
Substrate ground (for ESD current). Connection to AGND (on the PCB) is recommended.
16 E4
X– I A X– channel input
17 E3
Y– I A Y– channel input
18 E2 SNSGND
Sensor driver return
20 E1
AD0
I D Address input bit 0
— C4
NC
No solder bump for this location. Sensitive area. Avoid trtace beneath.
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TSC2004
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SBAS408A – JUNE 2007 – REVISED AUGUST 2007
TYPICAL CHARACTERISTICS (continued)
At TA = –40°C to +85°C, SNSVDD = VREF = +1.6V to +3.6V, I/OVDD = +1.2V to +3.6V, fADC = fOSC/2, High-Speed mode (fSCL
= 3.4MHz), 12-bit mode, and non-continuous AUX measurement, unless otherwise noted.
SWITCH ON-RESISTANCE
vs SNSVDD SUPPLY VOLTAGE
11
10
Y+
9
X+
8
7
X-
6
Y-
5
X+, Y+: SNSVDD to Pin
4 X-, Y-: Pin to GND
3 TA = +25°C
1.2 1.6 2.0 2.4 2.8
SNSVDD (V)
3.2
Figure 14.
3.6
TEMP1 DIODE VOLTAGE
vs SNSVDD SUPPLY VOLTAGE
590
SNSVDD = IOVDD = VREF
588 TA = +25°C
Measurement Includes
A/D Converter Offset
and Gain Errors
586
584
582
580
578
1.2 1.6 2.0 2.4 2.8 3.2 3.6
SNSVDD (V)
Figure 16.
INTERNAL OSCILLATOR CLOCK FREQUENCY
vs TEMPERATURE
4.20
SNSVDD = I/OVDD = VREF = 3.0V
4.15
4.10
4.05
4.00
TEMP DIODE VOLTAGE
vs TEMPERATURE
850
800
750 95.3mV
700
Measurement Includes
A/D Converter Offset
and Gain Errors
TEMP2
650
600
TEMP1
550
500
450
I/OVDD = SNSVDD = 3V
VREF = 2.5V
400
-40 -20
0
20 40
Temperature (°C)
138.2mV
60 80
100
Figure 15.
TEMP2 DIODE VOLTAGE
vs SNSVDD SUPPLY VOLTAGE
706
SNSVDD = IOVDD = VREF
704 TA = +25°C
Measurement Includes
A/D Converter Offset
and Gain Errors
702
700
698
696
694
1.2 1.6 2.0 2.4 2.8 3.2 3.6
SNSVDD (V)
Figure 17.
INTERNAL OSCILLATOR CLOCK FREQUENCY
vs TEMPERATURE
3.90
SNSVDD = I/OVDD = VREF = 1.6V
3.85
3.80
3.75
3.95
-40
-20
0 20 40 60
Temperature (°C)
Figure 18.
80 100
3.70
-40
-20
0 20 40 60
Temperature (°C)
Figure 19.
80 100
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| Páginas | Total 54 Páginas | |
| PDF Descargar | [ Datasheet TSC2004.PDF ] | |
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