ABSOLUTE MAXIMUM RATINGS
(1)
+V
CC
to GND ........................................................................ –0.3V to +6V
Analog Inputs to GND ............................................ –0.3V to +V
CC
+ 0.3V
Digital Inputs to GND ............................................. –0.3V to +V
CC
+ 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
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 Instru-
ments 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
MAXIMUM
INTEGRAL
LINEARITY
ERROR (LSB)
±2
SPECIFIED
TEMPERATURE
RANGE
–40°C to +85°C
PRODUCT
ADS7843E
PACKAGE-LEAD
SSOP-16
PACKAGE
DESIGNATOR
(1)
DBQ
PACKAGE
MARKING
ADS7843E
ADS7843E
ORDERING
NUMBER
ADS7843E
ADS7843E/2K5
TRANSPORT
MEDIA, QUANTITY
Rails, 100
Tape and Reel, 2500
"
"
"
"
"
NOTES: (1) For the most current specifications and package information, refer to our web site at www.ti.com.
PIN CONFIGURATION
Top View
SSOP
PIN DESCRIPTION
PIN
1
2
3
4
5
6
7
8
9
10
11
12
NAME
+V
CC
X+
Y+
X–
Y–
GND
IN3
IN4
V
REF
+V
CC
PENIRQ
DOUT
DESCRIPTION
Power Supply, 2.7V to 5V.
X+ Position Input. ADC input Channel 1.
Y+ Position Input. ADC input Channel 2.
X– Position Input
Y– Position Input
Ground
Auxiliary Input 1. ADC input Channel 3.
Auxiliary Input 2. ADC input Channel 4.
Voltage Reference Input
Power Supply, 2.7V to 5V.
Pen Interrupt. Open anode output (requires 10kΩ
to 100kΩ pull-up resistor externally).
Serial Data Output. Data is 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 is latched on
rising edge of DCLK.
Chip Select Input. Controls conversion timing and
enables the serial input/output register.
External Clock Input. This clock runs the SAR con-
version process and synchronizes serial data I/O.
+V
CC
X+
Y+
X–
Y–
GND
IN3
IN4
1
2
3
4
5
6
7
8
ADS7843
16
15
14
13
12
11
10
9
DCLK
CS
DIN
BUSY
DOUT
PENIRQ
+V
CC
V
REF
13
14
15
16
BUSY
DIN
CS
DCLK
2
ADS7843
www.ti.com
SBAS090B
TI [ TEXAS INSTRUMENTS ]
