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AD7191BRUZ-REEL

更新时间： 2024-11-04 06:36:11

品牌	Logo	应用领域
亚德诺 - ADI		传感器
页数	文件大小	规格书
20页	379K
描述
Pin-Programmable, Ultralow Noise, 24-Bit, Sigma-Delta ADC for Bridge Sensors

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AD7191BRUZ-REEL 数据手册

Pin-Programmable, Ultralow Noise, 24-Bit,

Sigma-Delta ADC for Bridge Sensors

AD7191

FEATURES

GENERAL DESCRIPTION

Pin-programmable output rate

Output data rate: 10 Hz, 50 Hz, 60 Hz, 120 Hz

Pin-programmable PGA

The AD7191 is a low noise, complete analog front end for high

precision measurement applications. It contains a low noise,

24-bit sigma-delta (Σ-Δ) ADC. The on-chip low noise gain

stage means that signals of small amplitude can be interfaced

directly to the ADC. It contains two differential analog inputs.

The part also includes a temperature sensor that can be used for

temperature compensation.

Gain: 1, 8, 64, 128

Pin-programmable power-down and reset

RMS noise: 15 nV @ 10 Hz (gain = 128)

Up to 21.5 noise free bits (gain = 1)

Internal or external clock

For ease-of-use, all the features of the AD7191 are controlled by

dedicated pins. The on-chip PGA has a gain of 1, 8, 64, or 128,

supporting a full-scale differential input of ±± ꢀ, ±62± mꢀ,

±78 mꢀ, or ±ꢁ9 mꢀ. The output data rate can be programmed

to 10 Hz, ±0 Hz, 60 Hz, or 120 Hz. Simultaneous ±0 Hz and 60 Hz

rejection is obtained when the output data rate is set to 10 Hz

or ±0 Hz; 60 Hz only rejection is obtained when the output data

rate is set to 60 Hz. The AD7191 can be operated with the

internal clock, or an external clock can be used.

Bridge power-down switch

Offset drift: 5 nV/°C

Gain drift: 1 ppm/°C

Specified drift over time

Simultaneous 50 Hz/60 Hz rejection

Internal temperature sensor

Power supply: 3 V to 5.25 V

Current: 4.35 mA

Temperature range: –40°C to +105°C

Package: 24-lead TSSOP

The part operates with a power supply of ꢁ ꢀ to ±.2± ꢀ. It

consumes a current of 4.ꢁ± mA. It is available in a 24-lead

TSSOP package.

INTERFACE

2-wire serial

SPI, QSPI™, and MICROWIRE™ compatible

Schmitt trigger on SCLK

APPLICATIONS

Weigh scales

Strain gauge transducers

Pressure measurement

Medical and scientific instrumentation

FUNCTIONAL BLOCK DIAGRAM

AGND

DGND REFIN(+) REFIN(–)

AD7191

DOUT/RDY

SCLK

AIN1

AIN2

AIN3

AIN4

SERIAL

INTERFACE

AND CONTROL

LOGIC

Σ-Δ

ADC

PDOWN

CHAN

MUX

PGA

CLKSEL

BPDSW

PGA2

PGA1

TEMPERATURE

SENSOR

CLOCK

CIRCUITRY

MCLK1 MCLK2

ODR2 ODR1 TEMP

Figure 1.

Rev. A

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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AD7191BRUZ-REEL 替代型号

型号	品牌	替代类型	描述	数据表
AD7191BRUZ	ADI	类似代替	Pin-Programmable, Ultralow Noise, 24-Bit, Sigma-Delta ADC for Bridge Sensors

与AD7191BRUZ-REEL相关器件

型号	品牌	获取价格	描述	数据表
AD7192	ADI	获取价格	4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7192BRUZ	ADI	获取价格	4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7192BRUZ-REEL	ADI	获取价格	4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7193	ADI	获取价格	4-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7193BCPZ	ADI	获取价格	4-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7193BCPZ-RL	ADI	获取价格	4-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7193BCPZ-RL7	ADI	获取价格	4-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7193BRUZ	ADI	获取价格	4-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7193BRUZ-REEL	ADI	获取价格	4-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
AD7194	ADI	获取价格	8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA

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