Datasheet > AD7172-2BRUZ-RL7

AD7172-2BRUZ-RL7

更新时间： 2024-11-05 01:06:47

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管转换器
页数	文件大小	规格书
61页	1139K
描述
True rail-to-rail analog and reference input buffers

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替代型号

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AD7172-2BRUZ-RL7 数据手册

Low Power, 24-Bit, 31.25 kSPS, Sigma-Delta

ADC with True Rail-to-Rail Buffers

AD7172-2

Data Sheet

FEATURES

GENERAL DESCRIPTION

Fast and flexible output rate: 1.25 SPS to 31.25 kSPS

Channel scan data rate of 6.21 kSPS/channel (161 µs settling)

Performance specifications

17.2 noise free bits at 31.25 kSPS

24 noise free bits at 5 SPS

The AD7172-2 is an intelligent, low noise, low power, multiplexed,

Σ-Δ analog-to-digital converter (ADC) with 2- or 4-channel

(fully differential/single-ended) inputs for low bandwidth

signals. The AD7172-2 has a maximum channel scan rate of

6.21 kSPS (161 µs) for fully settled data. The output data rates

range from 1.25 SPS to 31.25 kSPS.

INL: 2 ppm of FSR

85 dB rejection of 50 Hz and 60 Hz with 50 ms settling

User configurable input channels

2 fully differential channels or 4 single-ended channels

Crosspoint multiplexer

On-chip 2.5 V reference ( 2 ppm/°C drift)

True rail-to-rail analog and reference input buffers

Internal or external clock

The AD7172-2 integrates key analog and digital signal condition-

ing blocks to allow users to configure an individual setup for each

analog input channel in use via the SPI. Integrated true rail-to-rail

buffers on the analog inputs and external reference inputs provide

easy to drive high impedance inputs. The precision 2.5 V low drift

(2 ppm/°C) band gap internal reference (with an output reference

buffer) adds embedded functionality to reduce the external

component count.

Power supply

AVDD1 = 3.0 V to 5.5 V, AVDD2 = IOVDD = 2 V to 5.5 V

Split supply with AVDD1 and AVSS at 2.5 V or 1.65 V

ADC current: 1.5 mA

Temperature range: −40°C to +105°C

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

Serial port interface (SPI), QSPI-, MICROWIRE-, and DSP-

compatible

The digital filter allows simultaneous 50 Hz and 60 Hz rejection

at a 27.27 SPS output data rate. The user can switch between

different filter options according to the demands of each channel in

the application, with further digital processing functions such as

offset and gain calibration registers, which are also configurable on

a per channel basis. General-purpose inputs/outputs (GPIOs)

control external multiplexers synchronous to the ADC conversion

timing.

APPLICATIONS

Process control: PLC/DCS modules

Temperature and pressure measurement

Medical and scientific multichannel instrumentation

Chromatography

The specified operating temperature range is −40°C to +105°C.

The AD7172-2 is in a 24-lead TSSOP package.

Note that, throughout this data sheet, the dual function pin

names are referenced by the relevant function only.

FUNCTIONAL BLOCK DIAGRAM

AVDD1 AVDD2 REGCAPA

REF– REF+ REFOUT

IOVDD REGCAPD

CROSSPOINT

MULTIPLEXER

AVDD1

AVSS

1.8V

LDO

1.8V

LDO

BUFFERED

PRECISION

REFERENCE

RAIL-TO-RAIL

REFERENCE

AIN0

AIN1

AIN2

AIN3

AIN4

INT

AVDD

REF

INPUT BUFFERS

SCLK

SERIAL

DIGITAL

FILTER

INTERFACE

AND CONTROL

Σ-Δ ADC

DIN

DOUT/RDY

SYNC/ERROR

RAIL-TO-RAIL

ANALOG INPUT

GPIO AND

MUX

XTAL AND INTERNAL

CLOCK OSCILLATOR

CIRCUITRY

BUFFERS

AVSS

I/O CONTROL

AD7172-2

TEMPERATURE

SENSOR

AVSS

GPIO0 GPIO1

XTAL1 XTAL2/CLKIO

DGND

Figure 1.

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

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.

Technical Support

www.analog.com

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AD7172-2BRUZ-RL7 替代型号

型号	品牌	替代类型	描述	数据表
AD7172-2BRUZ	ADI	类似代替	True rail-to-rail analog and reference input buffers

与AD7172-2BRUZ-RL7相关器件

型号	品牌	获取价格	描述	数据表
AD7172-4	ADI	获取价格	ADC with True Rail-to-Rail Buffers
AD7172-4_17	ADI	获取价格	ADC with True Rail-to-Rail Buffers
AD7172-4BCPZ	ADI	获取价格	Low Power, with 4- or 8-channel, 24-bit, 31.
AD7172-4BCPZ-RL	ADI	获取价格	Low Power, with 4- or 8-channel, 24-bit, 31.
AD7172-4BCPZ-RL7	ADI	获取价格	Low Power, with 4- or 8-channel, 24-bit, 31.
AD7173-8	ADI	获取价格	Low Power, 8-/16-Channel, 31.25 kSPS, 24-Bit, Highly Integrated Sigma-Delta ADC
AD7173-8BCPZ	ADI	获取价格	Low Power, 8-/16-Channel, 31.25 kSPS, 24-Bit, Highly Integrated Sigma-Delta ADC
AD7173-8BCPZ-RL	ADI	获取价格	Low Power, 8-/16-Channel, 31.25 kSPS, 24-Bit, Highly Integrated Sigma-Delta ADC
AD7175-2	ADI	获取价格	24-Bit, 250 kSPS, Sigma-Delta ADC Settling and True Rail-to-Rail Buffers
AD7175-2_17	ADI	获取价格	24-Bit, 250 kSPS, Sigma-Delta ADC Settling and True Rail-to-Rail Buffers

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