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ADS8508 bảng dữ liệu(PDF) 2 Page - Texas Instruments

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ADS8508 bảng dữ liệu(HTML) 2 Page - Texas Instruments

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ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
ADS8508
SLAS433 – SEPTEMBER 2005
PACKAGE/ORDERING INFORMATION(1)
MINIMUM
NO
MINIMUM
SPECIFICATION
RELATIVE
PACKAGE
PACKAGE
ORDERING
TRANSPORT
PRODUCT
MISSING
SINAD
TEMPERATURE
ACCURACY
LEAD
DESIGNATOR
NUMBER
MEDIA, QTY
CODE
(dB)
RANGE
(LSB)
ADS8508IBDW
Tube, 25
ADS8508IB
±0.45
12
72
-40°C to 85°C
SO-20
DW
ADS8508IBDWR
Tape and Reel, 2000
(1)
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
over operating free-air temperature range (unless otherwise noted)(1)
ADS8508
R1IN
±25 V
R2IN
±25 V
Analog inputs
R3IN
±25 V
CAP
+VANA + 0.3 V to AGND2 - 0.3 V
REF
Indefinite short to AGND2, momentary short to VANA
DGND, AGND2
±0.3 V
VANA
6 V
Ground voltage differences
VDIG to VANA
0.3 V
VDIG
6 V
Digital inputs
-0.3 V to +VDIG + 0.3 V
Maximum junction temperature
165°C
Storage temperature range
–65°C to 150°C
Internal power dissipation
700 mW
Lead temperature (soldering, 10s)
260°C
(1)
All voltage values are with respect to network ground terminal.
At T
A = -40°C to 85°C, fs = 250 kHz, VDIG = VANA = 5 V, using internal reference and fixed resistors (See Figure 28 and
Figure 29) (unless otherwise specified)
ADS8508IB
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
Resolution
12
Bits
ANALOG INPUT
Voltage ranges(1)
Impedance(1)
Capacitance
50
pF
THROUGHPUT SPEED
Conversion cycle
Acquire and convert
4
µs
Throughput rate
250
kHz
DC ACCURACY
INL
Integral linearity error
-0.45
0.45
LSB(2)
DNL
Differential linearity error
-0.45
0.45
LSB
No missing codes
12
Bits
Transition noise(3)
0.1
LSB
(1)
±10 V, 0 V to 5 V, etc. (see Table 3)
(2)
LSB means least significant bit. For the ±10-V input range, one LSB is 4.88 mV.
(3)
Typical rms noise at worst case transitions and temperatures.
2


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