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ADS8638

更新时间： 2024-01-18 02:27:03
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
75页 1684K
描述
12-Bit, 1MSPS, 4-/8-Channel, Bipolar-Input, SAR Analog-to-Digital Converter

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ADS8638 数据手册

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ADS8634  
ADS8638  
www.ti.com  
SBAS541A –MAY 2011–REVISED AUGUST 2011  
12-Bit, 1MSPS, 4-/8-Channel, Bipolar-Input, SAR Analog-to-Digital Converter  
with Software-Selectable Ranges  
Check for Samples: ADS8634, ADS8638  
1
FEATURES  
DESCRIPTION  
The ADS8634 and ADS8638 (ADS8634/8) are 12-bit  
23  
•
Selectable Input Range:  
±10V, ±5V, ±2.5V, 0V to 10V, or  
0V to 5V  
analog-to-digital converters (ADCs) capable of  
measuring inputs up to ±10V at 1MSPS. Using a  
successive approximation register (SAR) core, these  
ADCs provide a sample-and-hold front-end with no  
latency in conversions. The ADS8634 includes an  
input multiplexer (mux) for measuring up to four  
inputs. The ADS8638 can measure up to eight inputs.  
Up to ±12V with External Reference  
•
No Latent Conversions Up to 1MSPS  
•
Outstanding Performance:  
12 Bits No Missing Codes  
INL: ±0.9LSB  
In addition to the input multiplexer, the ADS8634/8  
feature an internal temperature sensor, voltage  
reference, and a digital comparator for setting alarm  
SNR: 71.8dB  
•
Highly Integrated:  
4- or 8-Channel Input Mux  
Temperature Sensor  
Internal Voltage Reference  
Alarm Thresholds for Each Channel  
thresholds on each input; therefore,  
a minimal  
amount of external components are required. A  
simple SPI-compatible interface provides for  
communication and control. The digital supply  
operates from 5V all the way down to 1.8V for direct  
connection to a wide range of processors and  
controllers.  
•
Low Power:  
14.45mW at 1MSPS  
5.85mW at 0.1MSPS  
Flexible Power-Down Mode  
Ideal for demanding industrial measurement  
applications, the ADS8634/8 are fully specified over  
the extended industrial temperature range of –40°C  
to +125°C and are available in a small form-factor  
QFN-24 package.  
•
•
SPI™-Compatible Serial Interface  
Extended Temperature Range:  
–40°C to +125°C  
•
Small Footprint: 4mm × 4mm QFN Package  
APPLICATIONS  
•
•
•
•
Industrial Process Controls (PLC)  
Data Acquisition Systems  
High-Speed, Closed-Loop Systems  
Digital Power Supplies  
HVDD  
AVDD  
REF  
DVDD  
HVDD  
AVDD  
REF  
REF  
DVDD  
Alarm  
Threshold  
Alarm  
Threshold  
REF  
AIN0  
AIN0  
AIN1  
AIN1  
AIN2  
Comparator  
AL_PD  
Comparator  
AL_PD  
AIN3  
AIN4  
AIN5  
AIN6  
AIN7  
MUX  
MUX  
AIN2  
AIN3  
ADC  
ADC  
CS, SCLK,  
DIN, DOUT  
CS, SCLK,  
DIN, DOUT  
SPI  
SPI  
Temp  
Sensor  
ADS8634  
Temp  
Sensor  
ADS8638  
AINGND  
AINGND  
HVSS  
AGND  
REFGND  
DGND  
HVSS  
AGND  
REFGND  
DGND  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
3
SPI is a trademark of Motorola.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2011, Texas Instruments Incorporated  
1234567...75

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ADS8638 替代型号

型号 品牌 替代类型 描述 数据表
ADS8634 TI

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