Datasheet > EVAL-AD7173-8SDZ

EVAL-AD7173-8SDZ

更新时间： 2024-11-30 12:36:35

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
64页	1089K
描述
Low Power, 8-/16-Channel, 31.25 kSPS, 24-Bit, Highly Integrated Sigma-Delta ADC

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EVAL-AD7173-8SDZ 数据手册

Low Power, 8-/16-Channel, 31.25 kSPS,

24-Bit, Highly Integrated Sigma-Delta ADC

AD7173-8

Data Sheet

APPLICATIONS

FEATURES

Process control: PLC/DCS modules

Voltage, current, temperature, and pressure measurement

Flow meters

Low power, 8-/16-channel, highly integrated multiplexed

analog-to-digital converter (ADC)

Integration

Medical and scientific multichannel instrumentation

Seismic instrumentation

Chemical analysis instrumentation: chromatography

Precision analog input buffers and reference input buffers

2.5 V precision reference (3.5 ppm/°C)

Cross point multiplexer (enable system diagnostic)

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

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.

17.5 noise free bits at 31.25 kSPS

24 noise free bits at 1.25 SPS

INL: 3 ppm/FSR

Eight flexible setups with configurability for output data rate,

digital filter mode, offset/gain error correction, reference

selection, buffer enables and more.

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

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.

Integrated diagnostic features, including CRC, register checksum,

temperature sensor, crosspoint multiplexer, burnout currents,

and GPIOs/GPOs.

AVDD1 and AVSS 2.5 V or AVDD1 and AVSS 1.65 V

Current: 1.4 mA

3-/4-wire serial digital interface (Schmitt trigger on SCLK)

CRC error checking

SPI, QSPI, MICROWIRE, and DSP compatible

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

BUFFERED

1.8V

LDO

1.8V

LDO

PRECISION

REFERENCE

CROSSPOINT

MULTIPLEXER

INPUT

BUFFERS

INT

REF

AIN0/REF2–

AIN1/REF2+

AVDD

ANALOG

INPUT

BUFFERS

SCLK

DIN

SERIAL

INTERFACE

AND CONTROL

DIGITAL

FILTER

Σ-Δ ADC

DOUT/RDY

SYNC

ERROR

AIN15

AIN16

XTAL AND INTERNAL

CLOCK OSCILLATOR

CIRCUITRY

AVSS

I/O CONTROL

AD7173-8

TEMPERATURE

SENSOR

AVSS

PDSW

GPIO0 GPIO1 GPIO2 GPIO3

XTAL1 XTAL2/CLKIO

DGND

Figure 1.

Rev. 0

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

rightsof third parties that may result fromits use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks andregisteredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Technical Support

www.analog.com

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