Datasheet > AD7796

AD7796

更新时间： 2024-11-23 04:30:47

品牌	Logo	应用领域
亚德诺 - ADI		传感器
页数	文件大小	规格书
24页	558K
描述
Low Power, 16-/24-Bit Sigma-Delta ADC for Bridge Sensors

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AD7796 数据手册

Low Power, 16-/24-Bit Sigma-Delta ADC

for Bridge Sensors

AD7796/AD7797

GENERAL DESCRIPTION

FEATURES

RMS noise: 65 nV

Instrumentation amp

Temperature sensor

Internal clock oscillator

Simultaneous 50 Hz/60 Hz rejection

Update rate: 4.17 Hz to 123 Hz

Current: 250 μA typ

The AD7796/AD7797 are complete, analog front ends for high

precision, bridge sensor applications such as weigh scales. The

AD7796/AD7797 contain a Σ-Δ ADC capable of 16-/24-bit

resolution, respectively. The on-chip instrumentation amplifier

has a fixed gain of 128, allowing small amplitude signals such as

those from bridge sensors to be directly interfaced to the ADC.

Each part has one differential input and contains a temperature

sensor that is internally connected to the ADC. This sensor can

be used to perform temperature compensation of the bridge.

Power-down: 1 μA

Power supply: 2.7 V to 5.25 V

–40°C to +85°C temperature range

Independent interface power supply

16-lead TSSOP

The devices can be operated with the internal clock or an

external clock. The output data rate from the parts is software-

programmable and can be varied from 4.17 Hz to 123 Hz.

INTERFACE

The AD7796/AD7797 operate with a power supply from 2.7 V

to 5.25 V. Each part consumes a current of 250 μA typical and is

housed in a 16-lead TSSOP.

3-wire serial

SPI®, QSPI™, MICROWIRE™, and DSP compatible

Schmitt trigger on SCLK

APPLICATIONS

Weigh scales

Strain gages

Industrial process control

Instrumentation

Portable instrumentation

FUNCTIONAL BLOCK DIAGRAM

REFIN(+) REFIN(–)

GND

AD7796: 16-BIT ADC

AD7797: 24-BIT ADC

SERIAL

INTERFACE

AND

CONTROL

LOGIC

DOUT/RDY

DIN

SCLK

AIN(+)

AIN(–)

Σ-Δ

ADC

×128

MUX

GND

REFERENCE

INTERNAL

CLOCK

TEMP

SENSOR

AD7796/

AD7797

CLK

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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与AD7796相关器件

型号	品牌	获取价格	描述	数据表
AD7796_15	ADI	获取价格	Low Power, 16-/24-Bit Sigma-Delta ADC
AD7796BRUZ	ADI	获取价格	Low Power, 16-/24-Bit Sigma-Delta ADC for Bridge Sensors
AD7796BRUZ-REEL	ADI	获取价格	Low Power, 16-/24-Bit Sigma-Delta ADC for Bridge Sensors
AD7797	ADI	获取价格	Low Power, 16-/24-Bit Sigma-Delta ADC for Bridge Sensors
AD7797_15	ADI	获取价格	Low Power, 16-/24-Bit Sigma-Delta ADC
AD7797BRUZ	ADI	获取价格	Low Power, 16-/24-Bit Sigma-Delta ADC for Bridge Sensors
AD7797BRUZ	ROCHESTER	获取价格	1-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, LEAD FREE, MO-153AB, TSSOP-16
AD7797BRUZ-REEL	ADI	获取价格	Low Power, 16-/24-Bit Sigma-Delta ADC for Bridge Sensors
AD7798	ADI	获取价格	Low Power, 24-Bit/16-Bit Sigma-Delta ADC with In-Amp
AD7798_15	ADI	获取价格	3-Channel, Low Noise, Low Power

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