推荐星级:
- 1
- 2
- 3
- 4
- 5
模数转换器ADS1282数据手册
资料介绍
ADS1282目前第一款32bit AD.
ADS1282 High-Resolution Analog-To-Digital Converter
部分文件列表
文件名 | 大小 |
ads1282_2015.pdf | 2M |
部分页面预览
(完整内容请下载后查看)SBAS418I –SEPTEMBER 2007–REVISED MARCH 2015
ADS1282 High-Resolution Analog-To-Digital Converter
1 Features
3 Description
The ADS1282 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
ADS1282 is suitable for the demanding needs of
1
•
High Resolution:
130-dB SNR (250 SPS)
•
High Accuracy:
THD: –122 dB
INL: 0.5 ppm
energy
exploration
and
seismic
monitoring
environments.
•
•
•
Low-Noise PGA
Two-Channel Input Mux
The converter uses a fourth-order, inherently stable,
delta-sigma (ΔΣ) modulator that provides outstanding
noise and linearity performance. The modulator is
used either in conjunction with the on-chip digital
filter, or can be bypassed for use with post
processing filters.
Inherently-Stable Modulator with Fast Responding
Overrange Detection
•
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
The flexible input MUX provides an additional
external input for measurement, as well as internal
self-test connections. The PGA features outstanding
low noise (5 nV/√Hz) and high input impedance,
allowing easy interfacing to geophones and
hydrophones over a wide range of gains.
•
•
Filter Bypass Option
Low Power Consumption: 25 mW
Shutdown: 10 μW
•
•
•
Offset and Gain Calibration Engine
SYNC Input
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.
Analog Supply:
Unipolar (+5 V) or Bipolar (±2.5 V)
•
Digital Supply: 1.8 V to 3.3 V
The synchronization input (SYNC) can be used to
synchronize the conversions of multiple ADS1282s.
The SYNC input also accepts a clock input for
continuous alignment of conversions from an external
2 Applications
•
•
•
Energy Exploration
同步引脚对数据滤波器和调制器复位,使多个ADS1282通过一个
source.
Seismic Monitoring
外部事件同步转换。同步引脚支持连续切换,通过接收一个外部时钟锁定
转换率.
High-Accuracy Instrumentation
Together, the amplifier, modulator, and filter dissipate
25 mW. The ADS1282 is available in a compact
TSSOP-28 package and is fully specified from –40°C
to +85°C, with a maximum operating range to
+125°C.
AVDD
PGA
VREFN VREFP
DVDD
CLK
ADS1282
SCLK
DOUT
DIN
Input 1
4th-Order
DS
Programmable
Digital Filter
SPI
Calibration
Interface
Input 2
Modulator
DRDY
VCOM
Over-Range
SYNC
RESET
PWDN
Control
Modulator Output
3
AVSS
DGND
1
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.
SBAS418I –SEPTEMBER 2007–REVISED MARCH 2015
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.
4 Ordering Information
For the most current package and ordering information, see the Package Option Addendum at the end of this
document, or visit the device product folder at .
5 Specifications
5.1 Absolute Maximum Ratings(1)
Over operating free-air temperature range (unless otherwise noted).
ADS1282, ADS1282H
–0.3 to +5.5
UNIT
V
AVDD to AVSS
AVSS to DGND
–2.8 to +0.3
V
DVDD to DGND
–0.3 to +3.9
V
Input current
100, momentary
10, continuous
AVSS – 0.3 to AVDD + 0.3
–0.3 to DVDD + 0.3
+150
mA
mA
V
Input current
Analog input voltage
Digital input voltage to DGND
Maximum junction temperature
Operating temperature range
Storage temperature range
V
°C
°C
°C
–40 to +125
–60 to +150
(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.
2
Copyright © 2007–2015, Texas Instruments Incorporated
Product Folder Links:
全部评论(0)