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ADS1283A Arkusz danych(PDF) 1 Page - Texas Instruments

Numer części ADS1283A
Szczegółowy opis  High-Resolution, Analog-to-Digital Converter
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Strona internetowa  http://www.ti.com
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ADS1283A Arkusz danych(HTML) 1 Page - Texas Instruments

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Control
CLK
AVDD
AVSS
DVDD
DGND
Overrange
ADS1283
DOUT
DIN
DRDY
SCLK
SYNC
RESET
PWDN
PGA
Input 1
Input 2
VREFN VREFP
V
COM
CS
Programmable
Digital
Filter
Calibration
Serial
Interface
Control
4
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Modulator
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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. PRODUCTION DATA.
ADS1283
SBAS754 – DECEMBER 2017
ADS1283 High-Resolution, Analog-to-Digital Converter
1
1 Features
1
High Resolution:
SNR: 130 dB (250 SPS, PGA = 1)
High Accuracy:
THD: –122 dB
Low Power Consumption:
18 mW (PGA = 1, 2, 4, or 8)
Shutdown Mode: 10 μW
Low-Noise PGA: 5 nV/
√Hz
Two-Channel Input Multiplexer
Inherently-Stable Modulator With Fast Responding
Overrange Detector
Flexible Digital Filter:
Sinc + FIR + IIR (Selectable)
Linear or Minimum Phase Response
Programmable High-Pass Filter
Selectable FIR Data Rates:
250 SPS to 4 kSPS
Offset and Gain Calibration Engine
SYNC Input
Analog Supply: 5 V or ±2.5 V
Digital Supply: 1.8 V to 3.3 V
2 Applications
Energy Exploration
Seismic Monitoring
High-Accuracy Instrumentation
Simplified Schematic
3 Description
The ADS1283 is an extremely high-performance,
single-chip, analog-to-digital converter (ADC) with an
integrated, low-noise programmable gain amplifier
(PGA) and two-channel input multiplexer (mux). The
ADS1283 is suitable for the demanding needs of
seismic monitoring equipment.
The converter uses a fourth-order, inherently stable,
delta-sigma (ΔΣ) modulator that provides outstanding
noise and linearity performance. The modulator digital
output is digitally filtered and decimated by the on-
chip digital filter to yield the ADC conversion result.
The flexible input mux provides an additional external
input for measurement, as well as internal self-test
input connections. The PGA features outstanding low
noise (5 nV/
√Hz) and very-high input impedance,
allowing
easy
interfacing
to
geophones
and
hydrophones over a wide range of gains.
The digital filter provides selectable data rates from
250 to 4000 samples per second (SPS). The high-
pass filter (HPF) features an adjustable corner
frequency. On-chip gain and offset scaling registers
support system calibration.
The synchronization input (SYNC) can be used to
synchronize the conversions of multiple ADS1283
devices.
The ADS1283 is available in a compact 24-lead, 5-
mm × 4-mm VQFN package, and is fully specified
from –40°C to +85°C, with a maximum operating
temperature range of –50°C to +125°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ADS1283
VQFN (24)
5.00 mm × 4.00 mm
ADS1283A
ADS1283B
(1) For all available packages, see the package option addendum
at the end of the data sheet.
Device Comparison
PART NUMBER
OFFSET OPTION
THD (TYP)
GAIN
ADS1283
100 mV
–122 dB
1 to 64
ADS1283A
100 mV
–118 dB
1, 4, 16
ADS1283B
75 mV, 100 mV
–122 dB
1 to 64


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