AD7194

更新时间： 2024-11-04 06:36:11

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
56页	1009K
描述
8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA

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AD7194 数据手册

8-Channel, 4.8 kHz, Ultralow Noise,

24-Bit Sigma-Delta ADC with PGA

AD7194

Pressure measurement

Temperature measurement

Flow measurement

Weigh scales

°hromatography

FEATURES

Fast settling filter option

8 differential/16 pseudo differential input channels

RMS noise: 11 nV at 4.7 Hz (gain = 128)

15.5 noise-free bits at 2.4 kHz (gain = 128)

Up to 22 noise-free bits (gain = 1)

Offset drift: 5 nV/ꢀ°

Medical and scientific instrumentation

GENERAL DES°RIPTION

Gain drift: 1 ppm/ꢀ°

The AD7194 is a low noise, complete analog front end for high

precision measurement applications. It contains a low noise,

24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC).

The on-chip low noise gain stage means that signals of small

amplitude can interface directly to the ADC.

Programmable gain (1 to 128)

Output data rate: 4.7 Hz to 4.8 kHz

Internal or external clock

Simultaneous 50 Hz/60 Hz rejection

4 general-purpose digital outputs

Power supply

AV_DD: 3 V to 5.25 V

DV_DD: 2.7 V to 5.25 V

°urrent: 4.65 mA

Temperature range: −40ꢀ° to +105ꢀ°

Package: 32-lead LF°SP

The device can be configured to have eight differential inputs or

sixteen pseudo differential inputs. The on-chip 4.92 MHz clock

can be used as the clock source to the ADC or, alternatively, an

external clock or crystal can be used. The output data rate from

the part can be varied from 4.7 Hz to 4.8 kHz.

The device has a very flexible digital filter, including a fast

settling option. Variables such as output data rate and settling

time are dependent on the option selected. For applications that

require all conversions to be settled, the AD7194 includes zero

latency.

Interface

3-wire serial

SPI, QSPI™, MI°ROWIRE™, and DSP compatible

Schmitt trigger on S°LK

APPLI°ATIONS

The part operates with a power supply from 3 V to 5.25 V. It

consumes a current of 4.65 mA, and it is housed in a 32-lead

LFCSP package.

PL°/D°S analog input modules

Data acquisition

Strain gage transducers

FUN°TIONAL BLO°K DIAGRAM

AGND

DGND

REFIN1(+) REFIN1(–)

REFERENCE

DETECT

AD7194

AIN1/P3

AIN2/P2

AIN3/P1/REFIN2(+)

AIN4/P0/REFIN2(–)

DOUT/RDY

SERIAL

INTERFACE

AND

CONTROL

LOGIC

AIN5

MUX

DIN

Σ-Δ

ADC

PGA

SCLK

AIN16

AINCOM

AGND

TEMP

CLOCK

CIRCUITRY

SENSOR

MCLK1 MCLK2

Figure 1.

Rev. 0

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.

Trademarks and registeredtrademarks arethe property of their respective owners.

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

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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与AD7194相关器件

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AD7194BCPZ	ADI	获取价格	8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7194BCPZ-REEL	ADI	获取价格	8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7194BCPZ-REEL7	ADI	获取价格	8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7195	ADI	获取价格	4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA and AC Excitation
AD7195BCPZ	ADI	获取价格	4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA and AC Excitation
AD7195BCPZ-RL	ADI	获取价格	4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA and AC Excitation
AD7195BCPZ-RL7	ADI	获取价格	4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA and AC Excitation
AD720	ADI	获取价格	RGB to NTSC/PAL Encoders
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