Datasheet > AD7176-2BRUZ-RL

AD7176-2BRUZ-RL

更新时间： 2024-11-24 12:51:19

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
68页	959K
描述
The AD7176-2 is a fast settling, highly accurate, high resolution, multiplexed Î£-Î analog-to-digital converter (ADC) for low band-width input signals.

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AD7176-2BRUZ-RL 数据手册

24-Bit, 250 kSPS Sigma-Delta ADC

with 20 µs Settling

Data Sheet

AD7176-2

FEATURES

GENERAL DESCRIPTION

Fast and flexible output rate—5 SPS to 250 kSPS

Fast settling time—20 µs

Channel scan data rate of 50 kSPS/channel

Performance specifications

17 noise free bits at 250 kSPS

20 noise free bits at 2.5 kSPS

The AD7176-2 is a fast settling, highly accurate, high resolution,

multiplexed Σ-Δ analog-to-digital converter (ADC) for low band-

width input signals. Its inputs can be configured as two fully

differential or four pseudo differential inputs via the integrated

crosspoint multiplexer. An integrated precision, 2.5 V, low drift

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

reference buffer) adds functionality and reduces the external

component count.

22 noise free bits at 5 SPS

INL 2.5 ppm of FSR

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

User-configurable input channels

2 fully differential or 4 pseudo differential

Crosspoint multiplexer

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

Internal oscillator, external crystal, or external clock

Power supply

Single supply: 5 V AVDD1, 2 V to 5 V AVDD2 and IOVDD

Optional split supply: AVDD1 and AVSS 2.5 V

Current: 7.8 mA

Temperature range: −40°C to +105°C

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

CRC error checking

The maximum channel scan data rate is 50 kSPS (with a settling

time of 20 µs), resulting in fully settled data of 17 noise free bits.

User-selectable output data rates range from 5 SPS to 250 kSPS.

The resolution increases at lower speeds.

The AD7176-2 offers three key digital filters. The fast settling filter

maximizes the channel scan rate. The Sinc3 filter maximizes the

resolution for single-channel, low speed applications. For 50 Hz

and 60 Hz environments, the AD7176-2 specific filter minimizes

the settling times or maximizes the rejection of the line frequency.

These enhanced filters enable simultaneous 50 Hz and 60 Hz rejec-

tion with a 27 SPS output data rate (with a settling time of 36 ms).

System offset and gain errors can be corrected on a per channel

basis. This per channel configurability extends to the type of filter

and output data rate used for each channel. All switching of the

crosspoint multiplexer is controlled by the ADC and can be con-

figured to automatically control an external multiplexer via the

GPIO pins.

SPI, QSPI, MICROWIRE, and DSP compatible

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 AD7176-2 is housed in a 24-lead TSSOP package.

FUNCTIONAL BLOCK DIAGRAM

AVDD1 AVDD2 REGCAPA REF– REF+ REFOUT

IOVDD REGCAPD

BUFFERED

PRECISION

REFERENCE

1.8V

LDO

1.8V

LDO

INT

REF

AIN0

AIN1

SCLK

SERIAL

DIGITAL

FILTER

INTERFACE

AND CONTROL

Σ-Δ ADC

DIN

AIN2

DOUT/RDY

SYNC/ERROR

AIN3

XTAL AND INTERNAL

CLOCK OSCILLATOR

CIRCUITRY

I/O

CONTROL

AIN4

AD7176-2

CROSSPOINT

MULTIPLEXER

AVSS

GPIO0 GPIO1

XTAL1 CLKIO/XTAL2

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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AD7176-2BRUZ-RL 替代型号

型号	品牌	替代类型	描述	数据表
AD7176-2BRUZ	ADI	类似代替	The AD7176-2 is a fast settling, highly accur

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