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AD7173-8 반도체 회로 부품 판매점

Highly Integrated Sigma-Delta ADC



Analog Devices 로고
Analog Devices
AD7173-8 데이터시트, 핀배열, 회로
Data Sheet
Low Power, 8-/16-Channel, 31.25 kSPS,
24-Bit, Highly Integrated Sigma-Delta ADC
AD7173-8
FEATURES
APPLICATIONS
Low power, 8-/16-channel, highly integrated multiplexed
analog-to-digital converter (ADC)
Integration
Precision analog input buffers and reference input buffers
2.5 V precision reference (3.5 ppm/°C)
Cross point multiplexer (enable system diagnostic)
Process control: PLC/DCS modules
Voltage, current, temperature, and pressure measurement
Flow meters
Medical and scientific multichannel instrumentation
Seismic instrumentation
Chemical analysis instrumentation: chromatography
8 full differential or 16 single-ended channels
Clock oscillator
GPIO and GPO pins with automatic external mux control
Fast and flexible output rate: 1.25 SPS to 31.25 kSPS
Channel scan data rate: 6.21 kSPS/channel (161 µs settling)
Performance specifications
17.5 noise free bits at 31.25 kSPS
GENERAL DESCRIPTION
Fast settling, highly accurate, low power, 8-/16-channel,
multiplexed ADC for low bandwidth input signals with
integrated input buffers.
Integrated precision, 2.5 V, low drift (3.5 ppm/°C), band gap
reference and integrated oscillator.
24 noise free bits at 1.25 SPS
INL: ±3 ppm/FSR
85 dB rejection of 50 Hz and 60 Hz with 50 ms settling
Operates with either 3.3 V or5 V supply
Single supply
3.3 V or 5 V AVDD1, 2 V to 5 V AVDD2, and 2 V to 5 V IOVDD
Optional split supply
AVDD1 and AVSS ± 2.5 V or AVDD1 and AVSS ± 1.65 V
Current: 1.4 mA
Eight flexible setups with configurability for output data rate,
digital filter mode, offset/gain error correction, reference selection,
buffer enables and more. This per channel configurability extends
to the output data rate used for each channel when using
sinc5 + sinc1 filter.
Sinc5 + sinc1 filter maximizes channel scan rate, and sinc3 filter
maximizes resolution and enhanced 50 Hz/60 Hz rejection,
with four selectable options to maximize rejection.
3-/4-wire serial digital interface (Schmitt trigger on SCLK)
Integrated diagnostic features, including CRC, register checksum,
CRC error checking
temperature sensor, crosspoint multiplexer, burnout currents,
SPI, QSPI, MICROWIRE, and DSP compatible
and GPIOs/GPOs.
Package: 40-lead 6 mm × 6 mm LFCSP
Temperature range: −40°C to +105°C
FUNCTIONAL BLOCK DIAGRAM
AVDD1 AVDD2 REGCAPA
REF– REF+ REFOUT
IOVDD REGCAPD
1.8V
LDO
CROSSPOINT
MULTIPLEXER
REFERENCE
INPUT
BUFFERS
BUFFERED
PRECISION
REFERENCE
1.8V
LDO
AIN0/REF2–
AIN1/REF2+
AIN15
AIN16
AVDD ANALOG
INPUT
BUFFERS
Σ-Δ ADC
AVSS
I/O AND EXTERNAL
MUX CONTROL
INT
REF
DIGITAL
FILTER
SERIAL
INTERFACE
AND CONTROL
XTAL AND INTERNAL
CLOCK OSCILLATOR
CIRCUITRY
AD7173-8
CS
SCLK
DIN
DOUT/RDY
SYNC
ERROR
TEMPERATURE
SENSOR
AVSS
PDSW
GPIO0 GPIO1 GPO2 GPO3
XTAL1 XTAL2/CLKIO
Figure 1.
DGND
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2013–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


AD7173-8 데이터시트, 핀배열, 회로
AD7173-8* Product Page Quick Links
Last Content Update: 11/01/2016
Comparable Parts
View a parametric search of comparable parts
Evaluation Kits
• AD7173-8SDZ Evaluation Board
Documentation
Data Sheet
• AD7173-8: Low Power, 8-/16-Channel, 31.25 kSPS, 24-
Bit, Highly Integrated Sigma-Delta ADC Data Sheet
Technical Books
• The Data Conversion Handbook, 2005
User Guides
• UG-631: Evaluating the AD7173-8 24-Bit, 31.25 kSPS,
Sigma-Delta ADC with 161 μs Settling and Integrated
Analog Input Buffers
Software and Systems Requirements
• AD717x Microcontroller No-OS
• AD717x Eval+ Software
Tools and Simulations
• AD7173-8 Filter Model
• AD7173-8 IBIS Model
Reference Designs
• CN0292
• CN0364
Reference Materials
Technical Articles
• Flexible Bandwidth 4 mA to 20 mA Current Input with
Easy HART Compatibility
Tutorials
• MT-022: ADC Architectures III: Sigma-Delta ADC Basics
• MT-023: ADC Architectures IV: Sigma-Delta ADC
Advanced Concepts and Applications
Design Resources
• AD7173-8 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
View all AD7173-8 EngineerZone Discussions
Sample and Buy
Visit the product page to see pricing options
Technical Support
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* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet. Note: Dynamic changes to
the content on this page does not constitute a change to the revision number of the product data sheet. This content may be
frequently modified.




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