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ADS1118_12

更新时间： 2024-09-27 12:22:35
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德州仪器 - TI /
页数 文件大小 规格书
37页 1146K
描述
Ultra-Small, Low-Power, SPI™-Compatible, 16-Bit

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ADS1118_12 数据手册

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ADS1118  
www.ti.com  
SBAS457B –OCTOBER 2010–REVISED AUGUST 2012  
Ultra-Small, Low-Power, SPI™-Compatible, 16-Bit  
Analog-to-Digital Converter and Temperature Sensor with Internal Reference  
Check for Samples: ADS1118  
1
FEATURES  
DESCRIPTION  
The ADS1118 is  
a
precision analog-to-digital  
23  
•
Ultra-Small QFN Package:  
2mm × 1,5mm × 0,4mm  
converter (ADC) with 16 bits of resolution offered in  
an ultra-small, leadless QFN-10 package or an  
MSOP-10 package. The ADS1118 is designed with  
precision, power, and ease of implementation in  
mind. The ADS1118 features an onboard reference  
and oscillator. Data are transferred via a serial  
peripheral interface (SPI). The ADS1118 operates  
from a single power supply ranging from 2V to 5.5V.  
•
•
Wide Supply Range: 2.0V to 5.5V  
Low Current Consumption:  
–
–
Continuous Mode: Only 150μA  
Single-Shot Mode: Auto Shutdown  
•
Programmable Data Rate:  
8SPS to 860SPS  
The ADS1118 can perform conversions at rates up to  
860 samples per second (SPS). An onboard  
programmable gain amplifier (PGA) is available on  
the ADS1118 that offers input ranges from the supply  
to as low as ±256mV. This range allows both large  
and small signals to be measured with high  
resolution. The ADS1118 also features an input  
multiplexer (MUX) that provides two differential or  
four single-ended inputs. The ADS1118 can also  
function as a high-accuracy temperature sensor. This  
temperature sensor can be used for system-level  
temperature monitoring or cold junction compensation  
for thermocouples.  
•
•
•
Single-Cycle Settling  
Internal Low-Drift Voltage Reference  
Internal Temperature Sensor:  
–
0.5°C Max Error  
•
•
•
Internal Oscillator  
Internal PGA  
Four Single-Ended or Two Differential Inputs  
APPLICATIONS  
•
Temperature Measurement:  
The ADS1118 operates either in continuous  
–
–
–
Thermocouple Measurement  
Cold Junction Compensation  
Thermistor Measurement  
conversion mode or  
automatically powers down after  
a
single-shot mode that  
conversion.  
a
Single-shot mode significantly reduces current  
consumption during idle periods. The ADS1118 is  
specified from –40°C to +125°C.  
•
•
Portable Instrumentation  
Factory Automation and Process Controls  
2V  
0.1  
F
2V  
1Mȍ  
GND  
F
GND  
0.1  
1
500ȍ  
500ȍ  
AIN0  
VDD  
ADS1118  
F
Voltage  
Reference  
AIN1  
0.1  
F
1Mȍ  
SCLK  
GND  
GND  
CS  
SPI  
Interface  
16-bit Ȉǻ  
ADC  
MUX  
PGA  
DOUT/DRDY  
DIN  
2V  
1Mȍ  
GND  
F
0.1  
1
500ȍ  
500ȍ  
AIN2  
High Accuracy  
Temp Sensor  
F
Oscillator  
AIN3  
GND  
GND  
0.1  
F
1Mȍ  
GND  
GND  
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 © 2010–2012, Texas Instruments Incorporated  
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