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AD7797BRUZ-REEL

更新时间: 2024-11-23 04:30:47
品牌 Logo 应用领域
亚德诺 - ADI 转换器模数转换器传感器光电二极管
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

AD7797BRUZ-REEL 数据手册

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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  
AV  
REFIN(+) REFIN(–)  
GND  
DD  
AD7796: 16-BIT ADC  
AD7797: 24-BIT ADC  
AV  
DD  
SERIAL  
INTERFACE  
AND  
CONTROL  
LOGIC  
DOUT/RDY  
DIN  
SCLK  
CS  
AIN(+)  
AIN(–)  
Σ-Δ  
ADC  
×128  
MUX  
GND  
REFERENCE  
DV  
DD  
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  
©2006 Analog Devices, Inc. All rights reserved.  
 

AD7797BRUZ-REEL 替代型号

型号 品牌 替代类型 描述 数据表
AD7797BRUZ ADI

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Low Power, 16-/24-Bit Sigma-Delta ADC for Bridge Sensors

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