TSC2200
TSC220
0
TSC22
00
SBAS191F – FEBRUARY 2001 – REVISED APRIL 2004
PDA ANALOG INTERFACE CIRCUIT
FEATURES
q
4-WIRE TOUCH SCREEN INTERFACE AND
4-BY-4 KEYPAD INTERFACE
q
RATIOMETRIC CONVERSION
q
SINGLE 2.7V TO 3.6V SUPPLY
q
SERIAL INTERFACE
q
INTERNAL DETECTION OF SCREEN TOUCH
AND KEYPAD
q
PROGRAMMABLE 8-, 10-, OR 12-BIT
RESOLUTION
q
PROGRAMMABLE SAMPLING RATES
q
DIRECT BATTERY MEASUREMENT (0.5V to 6V)
q
q
q
q
ON-CHIP TEMPERATURE MEASUREMENT
TOUCH-PRESSURE MEASUREMENT
FULL POWER-DOWN CONTROL
TSSOP-28 AND QFN-32 PACKAGES
APPLICATIONS
q
PERSONAL DIGITAL ASSISTANTS
q
CELLULAR PHONES
q
MP3 PLAYERS
DESCRIPTION
The TSC2200 is a complete PDA analog interface circuit. It
contains a complete 12-bit, Analog-to-Digital (A/D) resistive
touch screen converter including drivers, the control to mea-
sure touch pressure, keyboard controller, and an 8-bit Digital-
to-Analog (D/A) converter output for LCD contrast control.
The TSC2200 interfaces to the host controller through a
standard SPI™ serial interface. The TSC2200 offers program-
mable resolution and sampling rates from 8- to 12-bits and up
to 125kHz to accommodate different screen sizes.
The TSC2200 also offers two battery-measurement inputs
capable of reading battery voltages up to 6V, while operating
at only 2.7V. It also has an on-chip temperature sensor
capable of reading 0.3°C resolution. The TSC2200 is available
in a TSSOP-28 and a QFN-32 package.
SPI is a registered trademark of Motorola.
US Patent No. 624639.
C1 C2 C3 C4 R1 R2 R3 R4
Keyboard Scanner
and State Control
MISO
SS
X+
X–
Y+
Y–
SCLK
Touch Panel
Drivers
Clock
Serial
Interface
and
Control
Logic
MOSI
Temp Sensor
A/D Converter
V
BAT1
Battery Monitor
MUX
DAV
PENIRQ
KBIRQ
V
BAT2
AUX1
AUX2
V
REF
ARNG
A
OUT
Battery Monitor
Internal 2.5V
Reference
D/A Converter
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.
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 © 2001-2004, Texas Instruments Incorporated
www.ti.com
ABSOLUTE MAXIMUM RATINGS
(1)
V
DD
to GND ........................................................................ –0.3V to +6.0V
V
BAT
Input Voltage to GND ............................................... –0.3V to +6.0V
Analog Input Voltage to GND (except V
BAT
) ........... –0.3V to V
DD
+ 0.3V
Digital Input Voltage to GND ................................... –0.3V to V
DD
+ 0.3V
Operating Temperature Range ...................................... –40°C to +105°C
Storage Temperature Range ......................................... –65°C to +150°C
Junction Temperature (T
J
Max) .................................................... +150°C
TSSOP Package
Power Dissipation .................................................... (T
J
Max – T
A
)/
θ
JA
θ
JA
Thermal Impedance .......................................................... 90°C/W
Lead Temperature, Soldering
Vapor Phase (60s) ............................................................ +215°C
Infrared (15s) ..................................................................... +220°C
NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings”
may cause permanent damage to the device. Exposure to absolute maximum
conditions for extended periods may affect device reliability.
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 han-
dling and installation procedures can cause damage.
ESD damage can range from subtle performance degrada-
tion 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.
PRODUCT
TSC2200
INTEGRAL
LINEARITY
PACKAGE
ERROR (LSB) PACKAGE-LEAD DESIGNATOR
(1)
±2
TSSOP-28
PW
SPECIFIED
TEMPERATURE
RANGE
–40°C to +85°C
PACKAGE
MARKING
TSC2200I
ORDERING
NUMBER
TSC2200IPW
TSC2200IPWR
TSC2200IRHB
TSC2200IRHBR
TRANSPORT
MEDIA, QUANTITY
Rails, 50
Tape and Reel, 2000
Tubes, 72
Tape and Reel, 2500
"
TSC2200
"
±2
"
QFN-32
"
RHB
"
–40°C to +85°C
"
TSC2200I
"
"
"
"
"
"
NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com.
TIMING CHARACTERISTICS
(1)(2)
At –40°C to +85°C, +V
DD
= +2.7V, V
REF
= +2.5V, unless otherwise noted.
TSC2200
PARAMETER
SCLK Period
Enable Lead Time
Enable Lag Time
Sequential Transfer Delay
Data Setup Time
Data Hold Time (inputs)
Data Hold Time (outputs)
Slave Access Time
Slave D
OUT
Disable Time
Data Valid
Rise Time
Fall Time
CONDITIONS
t
sck
t
Lead
t
Lag
t
td
t
su
t
hi
t
ho
t
a
t
dis
t
v
t
r
t
f
MIN
30
15
15
30
10
10
0
15
15
10
30
30
TYP
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES: (1) All input signals are specified with t
r
= t
f
= 5ns (10% to 90% of V
DD
) and timed from a voltage level of (V
IL
+ V
IH
)/2. (2) See timing diagram below.
TIMING DIAGRAM
All specifications typical at –40°C to +85°C, +V
DD
= +2.7V.
SS
t
Lead
t
sck
t
f
t
r
t
Lag
t
td
t
wsck
SCLK
t
wsck
t
v
MISO
t
a
t
su
MOSI
MSB IN
t
hi
MSB OUT
t
ho
BIT 6 ... 1
LSB OUT
t
dis
BIT 6 ... 1
LSB IN
2
TSC2200
www.ti.com
SBAS191F
ELECTRICAL CHARACTERISTICS
At –40°C to +85°C, +V
DD
= +2.7V, internal V
REF
= +2.5V, conversion clock = 2MHz, and 12-bit mode, unless otherwise noted.
TSC2200IPW
PARAMETER
AUXILIARY ANALOG INPUT
Input Voltage Range
Input Capacitance
Input Leakage Current
BATTERY MONITOR INPUT
Input Voltage Range
Input Capacitance
Input Leakage Current
Accuracy
TEMPERATURE MEASUREMENT
Temperature Range
Temperature Resolution
Accuracy
A/D CONVERTER
Resolution
No Missing Codes
Integral Linearity
Offset Error
Gain Error
Noise
Power-Supply Rejection
D/A CONVERTER
Output Current Range
Resolution
Integral Linearity
VOLTAGE REFERENCE
Voltage Range
Reference Drift
External Reference Input Range
Current Drain
DIGITAL INPUT/OUTPUT
Internal Clock Frequency
Logic Family
Logic Levels: V
IH
V
IL
V
OH
V
OL
POWER-SUPPLY REQUIREMENTS
Power-Supply Voltage, +V
DD
Quiescent Current
Programmable: 8-, 10-, or 12-Bits
12-Bit Resolution
CONDITIONS
MIN
0
25
±1
0.5
25
±1
–3
–40
0.3
±2
12
11
±2
±6
±6
30
80
Set by Resistor from ARNG to GND
650
8
±2
Internal 2.5V
Internal 1.25V
2.45
1.225
1.0
20
8
CMOS
I
IH
=
+5µA
I
IL
=
+5µA
I
OH
= 2 TTL Loads
I
OL
= 2 TTL Loads
Specified Performance
See Note (1)
See Note (2)
Power-Down
0.7V
DD
–0.3
0.8V
DD
0.3V
DD
0.4
2.7
1.25
500
3.6
2.3
3
–40
+85
✻
✻
✻
✻
✻
✻
✻
2.5
1.25
20
2.55
1.275
V
DD
✻
✻
✻
✻
✻
✻
✻
✻
✻
2.5
✻
✻
✻
✻
✻
✻
✻
1.285
✻
500
✻
✻
✻
✻
±3
✻
✻
+3
+85
✻
✻
✻
✻
✻
6.0
✻
✻
✻
✻
✻
TYP
MAX
+V
REF
MIN
✻
✻
✻
✻
TSC2200IRHB
TYP
MAX
✻
UNITS
V
pF
µA
V
pF
µA
%
°C
°C
°C
Bits
Bits
LSB
LSB
LSB
µVrms
dB
µA
Bits
LSB
V
V
ppm/°C
V
µA
MHz
V
V
V
V
V
mA
µA
µA
°C
Excluding Reference Error
TEMPERATURE RANGE
Specified Performance
✻
Specifications same as TSC2200IPW.
NOTES: (1) AUX1 conversion, no averaging, no REF power down, 50µs conversion. (2) AUX1 conversion, no averaging, external reference, 50µs conversion.
TSC2200
SBAS191F
www.ti.com
3
PIN CONFIGURATION
Top View
TSSOP
Top View
QFN
26 ARNG
28 AUX1
27 AUX2
+V
DD
X+
Y+
X–
Y–
GND
V
BAT1
V
BAT2
V
REF
KBIRQ
R1
R2
R3
R4
1
2
3
4
5
6
7
TSC2200
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
AUX1
30 V
DD
29 V
DD
AUX2
ARNG
A
OUT
PENIRQ
MISO
DAV
MOSI
SS
SCLK
C4
C3
X–
Y–
GND
V
BAT1
V
BAT2
V
REF
KBIRQ
R1
1
2
3
4
TSC2200
5
6
7
8
10
11
12
13
14
15
16
9
25 NC
24
23
22
21
20
19
18
17
32 Y+
31 X+
NC
A
OUT
PENIRQ
MISO
DAV
MOSI
SS
SCLK
C2
NC
R2
R3
R4
C1
C2
C3
C1
PIN DESCRIPTION
PIN
TSSOP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
—
QFN
29, 30
31
32
1
2
3
4
5
6
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
26
27
28
9, 24, 25
NAME
V
DD
X+
Y+
X–
Y–
GND
V
BAT1
V
BAT2
V
REF
KBIRQ
R1
R2
R3
R4
C1
C2
C3
C4
SCLK
SS
DESCRIPTION
Power Supply
X+ Position Input
Y+ Position Input
X– Position Input
Y– Position Input
Ground
Battery Monitor Input 1
Battery Monitor Input 2
Voltage Reference Input/Output
Keyboard Interrupt (active LOW)
Row 1
Row 2
Row 3
Row 4
Column 1
Column 2
Column 3
Column 4
Serial Clock Input
Slave Select Input (active LOW). Data will not be clocked in to MOSI unless
SS
is LOW. When
SS
is HIGH, MISO is high impedance.
MOSI
Serial Data Input. Data is clocked in at SCLK falling edge.
Data Available (active LOW)
DAV
MISO
Serial Data Output. Data is clocked out at SCLK falling edge. High impedance when
SS
is HIGH.
PENIRQ
Pen Interrupt
A
OUT
Analog Output Current from D/A Converter
ARNG D/A Converter Analog Output Range Set
AUX2
Auxiliary A/D Converter Input 2
AUX1
Auxiliary A/D Converter Input 1
NC
No Connection
C4
4
TSC2200
www.ti.com
SBAS191F
TYPICAL CHARACTERISTICS
At T
A
= +25°C, +V
DD
= +2.7V, conversion clock = 2MHz, 12-bit mode, and V
REF
= +2.5V, unless otherwise noted.
CONVERSION SUPPLY CURRENT vs TEMPERATURE
1.86
1.85
1.84
1.83
I
DD
(mA)
I
DD
(nA)
POWER-DOWN SUPPLY CURRENT
vs TEMPERATURE
10
8
6
1.82
1.81
1.80
1.79
1.78
–60
–40
–20
0
20
40
60
80
100
Temperature (°C)
4
2
0
–40
–20
0
20
40
60
80
100
Temperature (°C)
POWER-DOWN SUPPLY CURRENT vs
SUPPLY VOLTAGE
0.30
0.25
8.7
8.6
INTERNAL OSCILLATOR FREQUENCY vs V
DD
Supply Current (nA)
Frequency (MHz)
0.20
0.15
0.10
0.05
0
2.7
2.9
3.1
3.3
3.5
3.7
Supply Voltage (V)
8.5
8.4
8.3
8.2
8.1
2.5
2.7
2.9
3.1
V
DD
(V)
3.3
3.5
3.7
CHANGE IN GAIN ERROR vs TEMPERATURE
0.5
0.4
CHANGE IN OFFSET ERROR vs TEMPERATURE
0.5
0.4
Change in Offset (LSB)
Change in Gain Error (LSB)
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
–60
–40
–20
0
20
40
60
80
100
–60
–40
–20
0
20
40
60
80
100
Temperature (°C)
Temperature (°C)
TSC2200
SBAS191F
www.ti.com
5
Embedded System
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