TSC2046E
SBAS417 − JUNE 2007
Low Voltage I/O
TOUCH SCREEN CONTROLLER
FEATURES
D
D
D
D
D
D
D
D
D
D
D
Same Pinout as ADS7846
2.2V to 5.25V Operation
1.5V to 5.25V Digital I/O
Internal 2.5V Reference
Direct Battery Measurement (0V to 6V)
On-Chip Temperature Measurement
Touch-Pressure Measurement
QSPI and SPI 3-Wire Interface
Auto Power-Down
Exceeds IEC 61000-4-2 ESD Requirements
−
+15kV
Contact Discharge
− No External Components Needed
Available In TSSOP-16, QFN-16, and
VFBGA-48 Packages
DESCRIPTION
The TSC2046E is the next-generation version of the
ADS7846 4-wire touch screen controller, supporting a
low-voltage I/O interface from 1.5V to 5.25V. The
TSC2046E is 100% pin-compatible with the existing
ADS7846, and drops into the same socket. This design
allows for an easy upgrade of current applications to the
new version. The TSC2046E also has an on-chip 2.5V
reference that can be used for the auxiliary input, battery
monitor, and temperature measurement modes. The
reference can also be powered down when not used to
conserve power. The internal reference operates down to
a supply voltage of 2.7V, while monitoring the battery
voltage from 0V to 6V.
The low-power consumption of < 0.75mW typ at 2.7V
(reference off), high-speed (up to 125kHz sample rate),
and on-chip drivers make the TSC2046E an ideal choice
for battery-operated systems such as personal digital
assistants (PDAs) with resistive touch screens, pagers,
cellular phones, and other portable equipment. The
TSC2046E is available in TSSOP-16, QFN-16, and
VFBGA-48 packages and is specified over the –40°C to
+85°C temperature range.
APPLICATIONS
D
D
D
D
D
D
Personal Digital Assistants
Portable Instruments
Point-of-Sale Terminals
Pagers
Touch Screen Monitors
Cellular Phones
P e n D e tect
US Patent No. 6246394
PENIRQ
+V
CC
X+
X−
T e m pe ra ture
Se n sor
SAR
IOVDD
Y+
Y−
TSC2046E
Comparator
6−
Channel
MUX
Battery
Monitor
CDAC
Serial
Data
In/Out
DOUT
BUSY
CS
DCLK
DIN
V
BAT
AUX
V
RE F
Internal 2.5V Reference
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.
SPI and QSPI are trademarks of Motorola Inc.
Microwire is a trademark of National Semiconductor Corporation.
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 Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright
2007, Texas Instruments Incorporated
www.ti.com
TSC2046E
www.ti.com
SBAS417 − JUNE 2007
ABSOLUTE MAXIMUM RATINGS
(1)
+VCC and IOVDD to GND . . . . . . . . . . . . . . . . . . . . . −0.3V to +6V
Analog Inputs to GND . . . . . . . . . . . . . . . . . −0.3V to +VCC + 0.3V
Digital Inputs to GND . . . . . . . . . . . . . . . . . −0.3V to IOVDD + 0.3V
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250mW
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +150°C
Operating Temperature Range . . . . . . . . . . . . . . . . −40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . . . . −65°C to +150°C
Lead Temperature (soldering, 10s) . . . . . . . . . . . . . . . . . . . . . +300°C
IEC Contact Discharge (X+, X−, Y+, Y−)(2) . . . . . . . . . . . . . . .
±15kV
(1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods
may degrade device reliability. These are stress ratings only, and
functional operation of the device at these or any other conditions
beyond those specified is not implied.
(2) Test method based on IEC standard 61000−4−2. Contact Texas
Instruments for test details.
ELECTROSTATIC DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas
Instruments recommends that all integrated circuits be
handled with appropriate precautions. Failure to observe
proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could
cause the device not to meet its published specifications.
PACKAGE/ORDERING INFORMATION
(1)
NOMINAL
PENIRQ
PULLUP
RESISTOR
VALUES
MAXIMUM
INTEGRAL
LINEARITY
ERROR
(LSB)
SPECIFIED
TEMPERATURE
RANGE
−40°C to +85°C
PRODUCT
PACKAGE-
LEAD
TSSOP-16
4x4, 0.8mm
Thin
QFN-16
4x4
VFBGA-48
PACKAGE
DESIGNATOR
PW
PACKAGE
MARKING
TSC2046EI
ORDERING
NUMBER
TSC2046EIPW
TSC2046EIPWR
TSC2046EIRGVT
TRANSPORT
MEDIA, QUANTITY
Rails, 100
Tape and Reel, 2500
Tape and Reel, 250
Tape and Reel, 2500
Tape and Reel, 2500
TSC2046E
50kΩ
±2
RGV
−40°C to +85°C
TSC2046E
TSC2046EIRGVR
ZQC
−40°C to +85°C
BC2046E
TSC2046EIZQCR
(1)
For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet, or see the TI web
site at www.ti.com.
2
TSC2046E
www.ti.com
SBAS417 − JUNE 2007
ELECTRICAL CHARACTERISTICS: V
S
= +2.7V to +5.5V
At TA = −40°C to +85°C, +VCC = +2.7V, VREF = 2.5V internal voltage, fSAMPLE = 125kHz, fCLK = 16
•
fSAMPLE = 2MHz, 12-bit mode, digital
inputs = GND or IOVDD, and +VCC must be
•
IOVDD, unless otherwise noted.
PARAMETER
ANALOG INPUT
Full-Scale Input Span
Absolute Input Range
Capacitance
Leakage Current
SYSTEM PERFORMANCE
Resolution
No Missing Codes
Integral Linearity Error
Offset Error
Gain Error
Noise
Power-Supply Rejection
SAMPLING DYNAMICS
Conversion Time
Acquisition Time
Throughput Rate
Multiplexer Settling Time
Aperture Delay
Aperture Jitter
Channel-to-Channel Isolation
SWITCH DRIVERS
On-Resistance
Y+, X+
Y−, X−
Drive Current(2)
REFERENCE OUTPUT
Internal Reference Voltage
Internal Reference Drift
Quiescent Current
REFERENCE INPUT
Range
Input Impedance
CONDITION
Positive Input−Negative Input
Positive Input
Negative Input
MIN
0
−0.2
−0.2
25
0.1
12
11
±2
±6
±4
70
70
12
3
125
500
30
100
100
TSC2046E
TYP
MAX
VREF
+VCC + 0.2
+0.2
UNITS
V
V
V
pF
µA
Bits
Bits
LSB(1)
LSB
LSB
µVrms
dB
CLK Cycles
CLK Cycles
kHz
ns
ns
ps
dB
External VREF
Including Internal VREF
VIN = 2.5VPP at 50kHz
5
6
Duration 100ms
2.45
2.50
15
500
50
2.55
Ω
Ω
mA
V
ppm/°C
µA
V
GΩ
Ω
1.0
SER/DFR = 0, PD1 = 0
Internal Reference Off
Internal Reference On
0.5
10
1
VBAT = 0.5V to 5.5V, External VREF = 2.5V
VBAT = 0.5V to 5.5V, Internal Reference
−2
−3
−40
Differential Method(3)
TEMP0(4)
Differential Method(3)
TEMP0(4)
1.6
0.3
±2
±3
1
250
+VCC
BATTERY MONITOR
Input Voltage Range
Input Impedance
Sampling Battery
Battery Monitor Off
Accuracy
TEMPERATURE MEASUREMENT
Temperature Range
Resolution
Accuracy
(1)
(2)
(3)
(4)
(5)
(6)
(7)
6.0
V
kΩ
GΩ
%
%
°C
°C
°C
°C
°C
+2
+3
+85
LSB means
Least Significant Bit.
With VREF = +2.5V, 1 LSB is 610µV.
Assured by design, but not tested. Exceeding 50mA source current may result in device degradation.
Difference between TEMP0 and TEMP1 measurement, no calibration necessary.
Temperature drift is −2.1mV/°C.
TSC2046E operates down to 2.2V.
IOVDD must be − (+VCC).
Combined supply current from +VCC and IOVDD. Typical values obtained from conversions on AUX input with PD0 = 0.
3
TSC2046E
www.ti.com
SBAS417 − JUNE 2007
ELECTRICAL CHARACTERISTICS: V
S
= +2.7V to +5.5V (continued)
At TA = −40°C to +85°C, +VCC = +2.7V, VREF = 2.5V internal voltage, fSAMPLE = 125kHz, fCLK = 16
•
fSAMPLE = 2MHz, 12-bit mode, digital
inputs = GND or IOVDD, and +VCC must be
•
IOVDD, unless otherwise noted.
PARAMETER
DIGITAL INPUT/OUTPUT
Logic Family
Capacitance
VIH
VIL
VOH
VOL
Data Format
POWER-SUPPLY REQUIREMENTS
+VCC(5)
IOVDD(6)
Quiescent Current(7)
CONDITION
MIN
TSC2046E
TYP
CMOS
5
IOVDD
•
0.7
−0.3
IOVDD
•
0.8
Straight
Binary
Specified Performance
Operating Range
Internal Reference Off
Internal Reference On
fSAMPLE = 12.5kHz
Power-Down Mode with
CS = DCLK = DIN = IOVDD
+VCC = +2.7V
−40
2.7
2.2
1.5
280
780
220
3.6
5.25
+VCC
650
V
V
V
µA
µA
µA
µA
mW
°C
MAX
UNITS
All Digital Control Input Pins
| IIH |
≤
+5µA
| IIL |
≤
+5µA
IOH = −250µA
IOL = 250µA
15
IOVDD + 0.3
0.3
•
IOVDD
0.4
pF
V
V
V
V
3
1.8
+85
Power Dissipation
TEMPERATURE RANGE
Specified Performance
(1)
(2)
(3)
(4)
(5)
(6)
(7)
LSB means
Least Significant Bit.
With VREF = +2.5V, 1 LSB is 610µV.
Assured by design, but not tested. Exceeding 50mA source current may result in device degradation.
Difference between TEMP0 and TEMP1 measurement, no calibration necessary.
Temperature drift is −2.1mV/°C.
TSC2046E operates down to 2.2V.
IOVDD must be − (+VCC).
Combined supply current from +VCC and IOVDD. Typical values obtained from conversions on AUX input with PD0 = 0.
4
TSC2046E
www.ti.com
SBAS417 − JUNE 2007
PIN CONFIGURATION
Top View
TSSOP
Top View
DCLK
1
2
CS
3
DIN
4
BUSY DOUT
5
6
7
NC
VFBGA
+V
CC
X+
Y+
X−
Y
−
GND
V
BAT
AUX
1
2
3
4
5
6
7
8
TSC2046E
16
15
14
13
12
11
10
9
DCLK
CS
DIN
BUSY
DOUT
PENIRQ
Y+
+V
CC
+V
CC
X+
A
NC
B
C
D
E
F
NC
NC
NC
NC
NC
NC
PENIRQ
NC
NC
NC
NC
IOVDD
NC
NC
NC
NC
NC
V
REF
NC
NC
NC
NC
NC
AUX
NC
NC
NC
NC
NC
NC
IOVDD
V
REF
G
NC
NC
X−
Y−
GND
GND
V
BAT
15 PENIRQ
14 IOVDD
Top View
16 DOUT
QFN
13 V
REF
12
11
BUSY
DIN
CS
DCLK
1
2
3
4
AUX
V
BAT
GND
Y−
TSC2046E
10
9
5
6
7
Y+
+V
CC
X+
PIN DESCRIPTION
TSSOP PIN #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VFBGA PIN #
B1 and C1
D1
E1
G2
G3
G4 and G5
G6
E7
D7
C7
B7
A6
A5
A4
A3
A2
QFN PIN #
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
NAME
+VCC
X+
Y+
X−
Y−
GND
VBAT
AUX
VREF
IOVDD
PENIRQ
DOUT
BUSY
DIN
CS
DCLK
DESCRIPTION
Power Supply
X+ Position Input
Y+ Position Input
X− Position Input
Y− Position Input
Ground
Battery Monitor Input
Auxiliary Input to ADC
Voltage Reference Input/Output
Digital I/O Power Supply
Pen Interrupt
Serial Data Output. Data are shifted on the falling edge of DCLK. This output is high
impedance when CS is high.
Busy Output. This output is high impedance when CS is high.
Serial Data Input. If CS is low, data sre latched on the rising edge of DCLK.
Chip Select Input. Controls conversion timing and enables the serial input/output register.
CS high = power-down mode (ADC only).
External Clock Input. This clock runs the SAR conversion process and synchronizes serial
data I/O.
X−
8
5
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