Datasheet

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SBAS287A − JUNE 2003 − REVISED SEPTEMBER 2003
www.ti.com
2
ORDERING INFORMATION
PRODUCT PACKAGE−LEAD
PACKAGE
DESIGNATOR
(1)
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING
NUMBER
TRANSPORT
MEDIA, QUANTITY
ADS1245
MSOP-10
DGS
−40°C to +85°C
BHI
ADS1245IDGST Tape and Reel, 250
ADS1245
MSOP-10
DGS
−40
°
C to +85
°
C
BHI
ADS1245IDGSR Tape and Reel, 2500
(1)
For the most current specifications and package information, refer to our web site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted
(1)
ADS1245 UNIT
AVDD to GND −0.3 to +6 V
DVDD to GND −0.3 to +3.6 V
Input Current 100, momentary mA
Input Current 10, continuous mA
Analog Input Voltage to GND −0.5 to AVDD + 0.5 V
Analog Input Voltage to GND −0.3 to DVDD + 0.3 V
Digital Output Voltage to GND −0.3 to DVDD + 0.3 V
Maximum Junction Temperature +150 °C
Operating Temperature Range −40 to +85 °C
Storage Temperature Range −60 to +150 °C
Lead Temperature (soldering, 10s) +300 °C
(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.
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.
PIN ASSIGNMENTS
DGS PACKAGE
MSOP
(TOP VIEW)
1
2
3
4
5
10
9
8
7
6
CLK
SCLK
DRDY/DOUT
DVDD
AVDD
GND
VREFP
VREFN
AINN
AINP
ADS1245
Terminal Functions
TERMINAL
NAME NO. DESCRIPTION
GND 1 Analog and digital ground
VREFP 2 Positive reference input
VREFN 3 Negative reference input
AINN 4 Negative analog input
AINP 5 Positive analog input
AVDD 6 Analog power supply, 2.5V to 5.25V
DVDD 7 Digital power supply, 1.8V to 3.6V
DRDY/DOUT 8 Dual-purpose output:
Data ready: indicates valid data by going low.
Data output: outputs data, MSB first, on the
first rising edge of SCLK.
SCLK 9 Serial clock input: clocks out data on the
rising edge. Used to initiate calibration and
Sleep mode (see text for more details).
CLK 10 System clock input: typically 2.4576MHz