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ADS7844EG4 Arkusz danych(PDF) 4 Page - Texas Instruments

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Numer części ADS7844EG4
Szczegółowy opis  ANALOG-TO-DIGITAL CONVERTER
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

ADS7844EG4 Arkusz danych(HTML) 4 Page - Texas Instruments

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ADS7844
4
SBAS100A
www.ti.com
PIN CONFIGURATION
Top View
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
1
CH0
Analog Input Channel 0.
2
CH1
Analog Input Channel 1.
3
CH2
Analog Input Channel 2.
4
CH3
Analog Input Channel 3.
5
CH4
Analog Input Channel 4.
6
CH5
Analog Input Channel 5.
7
CH6
Analog Input Channel 6.
8
CH7
Analog Input Channel 7.
9
COM
Ground reference for analog inputs. Sets zero code
voltage in single ended mode. Connect this pin to ground
or ground reference point.
10
SHDN
Shutdown. When LOW, the device enters a very low
power shutdown mode.
11
VREF
Voltage Reference Input. See Specification Table for
ranges.
12
+VCC
Power Supply, 2.7V to 5V.
13
GND
Ground
14
GND
Ground
15
DOUT
Serial Data Output. Data is shifted on the falling edge of
DCLK. This output is high impedance when
CS is high.
16
BUSY
Busy Output. Busy goes low when the DIN control bits
are being read and also when the device is converting.
The Output is high impedance when CS is High.
17
DIN
Serial Data Input. If CS is LOW, data is latched on rising
edge of DCLK.
18
CS
Chip Select Input. Active LOW. Data will not be clocked
into DIN unless CS is low. When CS is high DOUT is high
impedance.
19
CLK
External Clock Input. The clock speed determines the
conversion rate by the equation fCLK = 16 • fSAMPLE.
20
+VCC
Power Supply
1
2
3
4
5
6
7
8
9
10
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
SHDN
+V
CC
D
CLK
CS
D
IN
BUSY
D
OUT
GND
GND
+V
CC
V
REF
20
19
18
17
16
15
14
13
12
11
ADS7844
MINIMUM
RELATIVE
MAXIMUM
SPECIFIED
ACCURACY
GAIN ERROR
TEMPERATURE
PACKAGE
ORDERING
TRANSPORT
PRODUCT
(LSB)
(LSB)
RANGE
PACKAGE-LEAD
DESIGNATOR
NUMBER
MEDIA, QUANTITY
ADS7844E
±2
±4
–40
°C to +85°C
QSOP-20
DBQ
ADS7844E
Rails, 56
"
"
"
"
"
"
ADS7844E/2K5
Tape and Reel, 2500
ADS7844N
"
"
"
SSOP-20
DB
ADS7844N
Rails, 68
"
"
"
"
"
"
ADS7844N/1K
Tape and Reel,1000
ADS7844EB
±1
±3
–40
°C to +85°C
QSOP-20
DBQ
ADS7844EB
Rails, 56
"
"
"
"
"
"
ADS7844EB/2K5
Tape and Reel, 2500
ADS7844NB
"
"
"
SSOP-20
DB
ADS7844NB
Rails, 68
"
"
"
"
"
"
ADS7844NB/1K
Tape and Reel, 1000
NOTES: (1) For the most current package and ordering information, see the Package Option Addendum at the end of this data sheet.
PACKAGE/ORDERING INFORMATION(1)
ABSOLUTE MAXIMUM RATINGS(1)
+VCC to GND ........................................................................ –0.3V to +6V
Analog Inputs to GND ............................................ –0.3V to +VCC + 0.3V
Digital Inputs to GND ........................................................... –0.3V to +6V
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.


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