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ADS1216Y bảng dữ liệu(PDF) 1 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER
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nhà sản xuất  TI [Texas Instruments]
Trang chủ  http://www.ti.com
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ADS1216Y bảng dữ liệu(HTML) 1 Page - Texas Instruments

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8-Channel, 24-Bit
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q 24 BITS NO MISSING CODES
q 0.0015% INL
q 22 BITS EFFECTIVE RESOLUTION
(PGA = 1), 19 BITS (PGA = 128)
q PGA FROM 1 TO 128
q SINGLE CYCLE SETTLING MODE
q PROGRAMMABLE DATA OUTPUT RATES
UP TO 1kHz
q ON-CHIP 1.25V/2.5V REFERENCE
q EXTERNAL DIFFERENTIAL REFERENCE
OF 0.1V TO 2.5V
q ON-CHIP CALIBRATION
q SPI™ COMPATIBLE
q 2.7V TO 5.25V
q < 1mW POWER CONSUMPTION
DESCRIPTION
The ADS1216 is a precision, wide dynamic range, delta-sigma, Analog-
to-Digital (A/D) converter with 24-bit resolution operating from 2.7V to
5.25V supplies. The delta-sigma, A/D converter provides up to 24 bits of
no missing code performance and effective resolution of 22 bits.
The eight input channels are multiplexed. Internal buffering can be
selected to provide a very high input impedance for direct connection to
transducers or low-level voltage signals. Burn out current sources are
provided that allow for the detection of an open or shorted sensor. An 8-
bit Digital-to-Analog (D/A) converter provides an offset correction with
a range of 50% of the FSR (Full-Scale Range).
The PGA (Programmable Gain Amplifier) provides selectable gains
of 1 to 128 with an effective resolution of 19 bits at a gain of 128.
The A/D conversion is accomplished with a second-order delta-
sigma modulator and programmable sinc filter. The reference input
is differential and can be used for ratiometric cancellation. The on-
board current DACs (Digital-to-Analog Converters) operate inde-
pendently with the maximum current set by an external resistor.
The serial interface is SPI compatible. Eight bits of digital I/O are
also provided that can be used for input or output. The ADS1216 is
designed for high-resolution measurement applications in smart
transmitters, industrial process control, weight scales, chromatogra-
phy, and portable instrumentation.
APPLICATIONS
q INDUSTRIAL PROCESS CONTROL
q LIQUID/GAS CHROMATOGRAPHY
q BLOOD ANALYSIS
q SMART TRANSMITTERS
q PORTABLE INSTRUMENTATION
q WEIGHT SCALES
q PRESSURE TRANSDUCERS
ADS1
216
SPI is a registered trademark of Motorola.
BUF
PGA
A = 1:128
+
1.25V or
2.5V
Reference
Clock Generator
Registers
Serial Interface
2nd-Order
Modulator
RAM
Digital I/O
Interface
AGND
AV
DD
IN+
IN–
R
DAC
V
REFOUT
V
RCAP
V
REF+
V
REF–
X
IN
X
OUT
DSYNC
PDWN
RESET
DRDY
D7
BUFEN
DGND
DV
DD
...
D0
SCLK
POL
D
IN
D
OUT
CS
MUX
A
IN0
A
IN1
A
IN2
A
IN3
A
IN4
A
IN5
A
IN6
A
IN7
A
INCOM
IDAC1
Controller
Program-
mable
Digital
Filter
2
µA
AV
DD
8-Bit
IDAC
IDAC2
8-Bit
IDAC
Offset
DAC
AGND
2
µA
ADS1216
SBAS171B – JUNE 2001
www.ti.com
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 2000, Texas Instruments Incorporated
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.


Số phần tương tự - ADS1216Y

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