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ADS1158 bảng dữ liệu(PDF) 1 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  16-Channel, 16-Bit Analog-to-Digital Converter
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ADS1158 bảng dữ liệu(HTML) 1 Page - Texas Instruments

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ADS1158
16-Bit
ADC
Digital
Filter
Internal
Monitoring
16:1
Analog
Input
MUX
1
16
AINCOM
ADC
IN
ExtCLK
In/Out
AVSS
DGND
32.768kHz
AVDD
DVDD
MUX
OUT
SPI
Interface
CS
DRDY
SCLK
DIN
DOUT
Control
Oscillator
GPIO
START
RESET
PWDN
GPIO[7:0]
V
REF
ADS1158
AnalogInputs
ADS1158
www.ti.com
SBAS429D
– JUNE 2008 – REVISED MARCH 2011
16-Channel, 16-Bit Analog-to-Digital Converter
Check for Samples: ADS1158
1
FEATURES
DESCRIPTION
The
ADS1158
is
a
16-channel
(multiplexed),
23
16 Bits, No Missing Codes
low-noise, 16-bit, delta-sigma (
ΔΣ) analog-to-digital
Fixed-Channel or Automatic Channel Scan
converter (ADC) that provides single-cycle settled
Fixed-Channel Data Rate: 125kSPS
data at channel scan rates from 1.8k to 23.7k
samples per second (SPS) per channel. A flexible
Auto-Scan Data Rate: 23.7kSPS/Channel
input
multiplexer
accepts
combinations
of
eight
Single-Conversion Settled Data
differential or 16 single-ended inputs with a full-scale
16 Single-Ended or 8 Differential Inputs
differential range of 5V or true bipolar range of
±2.5V
when operating with a 5V reference. The fourth-order
Unipolar (+5V) or Bipolar (
±2.5V) Operation
delta-sigma modulator is followed by a fifth-order sinc
0.3LSB (INL)
digital filter optimized for low-noise performance.
DC Stability:
The differential output of the multiplexer is accessible
1
μV/°C Offset Drift, 2ppm/°C Gain Drift
to allow signal conditioning before the input of the
Open-Sensor Detection
ADC.
Internal
system
monitor
registers
provide
Conversion Control Pin
supply voltage, temperature, reference voltage, gain,
and offset data.
Multiplexer Output for External Signal
Conditioning
An onboard PLL generates the system clock from a
32.768kHz crystal, or can be overridden by an
On-Chip Temperature, Reference, Offset, Gain,
external clock source. A buffered system clock output
and Supply Voltage Readback
(15.7MHz) is provided to drive a microcontroller or
42mW Power Dissipation
additional converters.
Standby, Sleep, and Power-Down Modes
Serial digital communication is handled via an
Eight General-Purpose Inputs/Outputs (GPIO)
SPI
™-compatible interface. A simple command word
32.768kHz Crystal Oscillator or External Clock
structure controls channel configuration, data rates,
digital I/O, monitor functions, etc.
APPLICATIONS
Programmable sensor bias current sources can be
Medical, Avionics, and Process Control
used to bias sensors or verify sensor integrity.
Machine and System Monitoring
The ADS1158 operates from a unipolar +5V or
Fast Scan Multi-Channel Instrumentation
bipolar
±2.5V analog supply and a digital supply
compatible with interfaces ranging from 2.7V to
Industrial Systems
5.25V. The ADS1158 is available in a QFN-48
Test and Measurement Systems
package.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
SPI is a trademark of Motorola, Inc.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright
© 2008–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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