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ADS1278-SP Scheda tecnica(PDF) 1 Page - Texas Instruments

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Il numero della parte ADS1278-SP
Spiegazioni elettronici  Radiation Hardened 8-Ch Simultaneous-Sampling 24-Bit Analog-to-Digital Converter
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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ADS1278-SP Scheda tecnica(HTML) 1 Page - Texas Instruments

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ADS1278-SP
VREFP VREFN AVDD
DVDD
TEST[1:0]
FORMAT[2:0]
CLK
SYNC
PWDN[8:1]
CLKDIV
Control
Logic
SPI
and
Frame-
Sync
Interface
IOVDD
DGND
AGND
DRDY/FSYNC
SCLK
DOUT[8:1]
DIN
Input2
Input1
Input4
Input3
Input6
Input5
Input8
Input7
DS
DS
DS
DS
DS
DS
DS
DS
MODE[1:0]
Eight
Digital
Filters
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. ADVANCE INFORMATION for pre-production products; subject to
change without notice.
ADS1278-SP
SBAS937 – SEPTEMBER 2018
ADS1278-SP Radiation Hardened 8-Ch Simultaneous-Sampling
24-Bit Analog-to-Digital Converter
1
1 Features
1
Radiation Hardened
TID 75 krad(Si)
TID Radiation Lot Acceptance Test (RLAT)
TBD
Single Event Latchup (SEL) Immune to LET 68
MeV-cm2/mg @ 125°C
Simultaneously Samples Eight Channels
Up to 128-kSPS Data Rate
AC Performance:
63-kHz Bandwidth
111-dB SNR (High-Resolution Mode)
–108-dB THD
DC Accuracy:
0.8-μV/°C Offset Drift
1.3-ppm/°C Gain Drift
Selectable Operating Modes:
High-Speed: 128 kSPS, 106-dB SNR
High-Resolution: 52 kSPS, 111-dB SNR
Low-Power: 52 kSPS, 31 mW/ch
Low-Speed: 10 kSPS, 7 mW/ch
Linear Phase Digital Filter
SPI™ or Frame-Sync Serial Interface
Low Sampling Aperture Error
Modulator Output Option (Digital Filter Bypass)
Analog Supply: 5 V
Digital Core: 1.8 V
I/O Supply: 1.8 V to 3.3 V
2 Applications
Space Systems (Satellite, Shuttles, Stations)
Satellite Temperature and Position Sensing
Orbital Observation Systems
Precision and Scientific Applications
High-Accuracy Instrumentation
3 Description
The ADS1278-SP (octal) is a 24-bit, delta-sigma (ΔΣ)
analog-to-digital converter (ADC) with data rates up
to
128k
samples
per
second
(SPS),
allowing
simultaneous sampling of eight channels.
Traditionally, industrial delta-sigma ADCs offering
good drift performance use digital filters with large
passband droop. As a result, they have limited signal
bandwidth
and
are
mostly
suited
for
dc
measurements.
High-resolution
ADCs
in
audio
applications offer larger usable bandwidths, but the
offset and drift specifications are significantly weaker
than
respective
industrial
counterparts.
The
ADS1278-SP combines these types of converters,
allowing high-precision industrial measurement with
excellent dc and ac specifications.
The
high-order,
chopper-stabilized
modulator
achieves very low drift with low in-band noise. The
onboard decimation filter suppresses modulator and
signal out-of-band noise. These ADCs provide a
usable signal bandwidth up to 90% of the Nyquist
rate with less than 0.005 dB of ripple.
Device Information(1)
PART NUMBER
GRADE
PACKAGE
ADS1278MHFQ-MLS
Flight Grade 75 krad(Si);
–55°C to 125°C
84-Pin HFQ
ADS1278WHFQ-MLS
Flight Grade 75 krad(Si);
–55°C to 115°C
ADS1278HFQ/EM
Engineering Samples(2)
ADS1278EVM-CVAL
Ceramic Evaluation Board
EVM
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
(2) These units are intended for engineering evaluation only.
They are processed to a noncompliant flow. These units are
not suitable for qualification, production, radiation testing or
flight use. Parts are not warranted for performance over the
full MIL specified temperature range of –55°C to 125°C or
operating life.
Simplified Schematic


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