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ADS1148IPW bảng dữ liệu(PDF) 1 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  16-Bit Analog-to-Digital Converters for Temperature Sensors
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ADS1148IPW bảng dữ liệu(HTML) 1 Page - Texas Instruments

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Input
Mux
3rdOrder
DS
Modulator
REFP
REFN
PGA
Burnout
Detect
Burnout
Detect
DVDD
DGND
ADS1146
AVSS
AIN0
AIN1
SCLK
DIN
DRDY
DOUT/DRDY
CS
START
RESET
AVDD
InternalOscillator
Adjustable
Digital
Filter
Serial
Interface
and
Control
CLK
Input
Mux
3rdOrder
DS
Modulator
REFP1 REFN1 VREFOUT VREFCOM
REFP0/
GPIO0
REFN0/
GPIO1
Burnout
Detect
Burnout
Detect
DVDD
DGND
IEXC1
AVSS
AIN0/IEXC
AIN1/IEXC
AIN2/IEXC/GPIO2
AIN3/IEXC/GPIO3
AIN4/IEXC/GPIO4
AIN5/IEXC/GPIO5
AIN6/IEXC/GPIO6
AIN7/IEXC/GPIO7
ADS1148 Only
SCLK
DIN
DRDY
DOUT/DRDY
CS
START
RESET
AVDD
IEXC2
InternalOscillator
Voltage
Reference
Serial
Interface
and
Control
V
BIAS
GPIO
CLK
ADS1148 Only
ADS1147
ADS1148
PGA
System
Monitor
Adjustable
Digital
Filter
Dual
Current
DACs
VREFMux
ADS1148 Only
V
BIAS
ADS1146
ADS1147
ADS1148
www.ti.com
SBAS453F – JULY 2009 – REVISED APRIL 2012
16-Bit Analog-to-Digital Converters for Temperature Sensors
Check for Samples: ADS1146, ADS1147, ADS1148
1
FEATURES
DESCRIPTION
The ADS1146, ADS1147, and ADS1148 are highly-
23
16 Bits, No Missing Codes
integrated,
precision,
16-bit
analog-to-digital
Data Output Rates Up to 2kSPS
converters (ADCs). The ADS1146/7/8 feature an
Single-Cycle Settling for All Data Rates
onboard, low-noise, programmable gain amplifier
(PGA), a precision delta-sigma ADC with a single-
Simultaneous 50/60Hz Rejection at 20SPS
cycle settling digital filter, and an internal oscillator.
4 Differential/7 Single-Ended Inputs (ADS1148)
The ADS1147 and ADS1148 also provide a built-in
2 Differential/3 Single-Ended Inputs (ADS1147)
voltage reference with 10mA output capacity, and two
matched
programmable
current
digital-to-analog
Matched Current Source DACs
converters (DACs). The ADS1146/7/8 provide a
Internal Voltage Reference
complete front-end solution for temperature sensor
Sensor Burnout Detection
applications including thermal couples, thermistors,
and resistance temperature detectors (RTDs).
4/8 General-Purpose I/Os (ADS1147/8)
Internal Temperature Sensor
An input multiplexer supports four differential inputs
for the ADS1148, two for the ADS1147, and one for
Power Supply and VREF Monitoring
the ADS1146. In addition, the multiplexer has a
(ADS1147/8)
sensor
burnout
detect,
voltage
bias
for
Self and System Calibration
thermocouples, system monitoring, and general-
SPI™-Compatible Serial Interface
purpose digital I/Os (ADS1147 and ADS1148). The
onboard, low-noise PGA provides selectable gains of
Analog Supply Operation:
1 to 128. The delta-sigma modulator and adjustable
+2.7V to +5.25V Unipolar, ±2.5V Bipolar
digital filter settle in only one cycle, for fast channel
Digital Supply: +2.7V to +5.25V
cycling when using the input multiplexer, and support
Operating Temperature –40°C to +125°C
data rates up to 2kSPS. For data rates of 20SPS or
less, both 50Hz and 60Hz interference are rejected
by the filter.
APPLICATIONS
Temperature Measurement
The ADS1146 is offered in a small TSSOP-16
package, the ADS1147 is available in a TSSOP-20
RTDs, Thermocouples, and Thermistors
package, and the ADS1148 is available in TSSOP-28
Pressure Measurement
and QFN-32 packages. All three devices operate over
Industrial Process Control
the extended specified temperature range of –40°C to
+105°C.
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 © 2009–2012, 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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[Old version datasheet]   16-Bit Analog-to-Digital Converters for Temperature Sensors
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