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ADS8201_1

更新时间： 2024-11-21 06:36:27
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德州仪器 - TI /
页数 文件大小 规格书
35页 663K
描述
2.2V to 5.5V,Low-Power, 12-Bit, 100kSPS, 8-Channel Data Acquisition System with PGA and SPI™ Interface

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ADS8201_1 数据手册

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ADS8201  
www.ti.com  
SLAS534B –JULY 2009–REVISED MAY 2010  
2.2V to 5.5V, Low-Power, 12-Bit, 100kSPS, 8-Channel  
Data Acquisition System with PGA and SPI™ Interface  
Check for Samples: ADS8201  
1
FEATURES  
•
Multi-Chip Ready and Fully Enabled:  
– Global CONVST (Independent of CS)  
234  
•
Low-Power, Flexible Supply Range:  
–
–
–
2.2V to 5.5V Analog Supply  
•
•
Power-Down Mode  
1.32mW (100kHz, +VA = 2.2V, +VD = 2.2V)  
4.5mW (100kHz, +VA = 5V, +VD = 5V)  
24-Pin 4×4 QFN Package  
APPLICATIONS  
•
Up to 100kSPS Throughput Rate  
Excellent DC Performance:  
•
•
•
•
•
Portable Communications  
Transducer Interfaces  
Portable Medical Instruments  
Data Acquisition Systems  
GPS Chipsets  
•
–
–
–
–
±0.5 LSB typ, ±1.5 LSB max INL  
±0.5 LSB typ, ±1.0 LSB max DNL  
±6 LSB Offset Error at +VA =5V  
±0.1%FS Gain Error at +VA = 5V  
...  
•
Flexible Analog Inputs:  
DESCRIPTION  
–
–
–
–
–
True Differential Input  
Differential/Unipolar Input Range (0 to VREF  
TAG Bit Output  
)
The ADS8201 is a low-power, complete on-chip data  
acquisition system optimized for portable applications  
that require direct connections, wide dynamic range,  
and automatic operation with very low power  
consumption. The device includes  
capacitor-based, successive approximation register  
(SAR) analog-to-digital converter (ADC);  
high-performance, continuous-time programmable  
gain amplifier (PGA); and a fully automatic scan,  
8-to-1 multiplexer (mux) with breakout to allow for  
system design flexibility.  
Programmable Averaging Function  
Onboard, Eight Single-Ended/Four  
Differential Channel Mux:  
a
12-bit,  
a
–
–
–
–
–
–
High Input Impedance  
High-Performance PGA (Gain = 1/2/4/8)  
PGA Breakout  
Auto/Manual Channel Select with Gain  
Auto/Manual Trigger  
Many other features are included to further optimize  
system operation. Conversion results may be saved  
in an onboard first-in/first-out (FIFO) buffer and read  
out at a later time. Each channel has a gain setting  
that can be loaded automatically when it is selected.  
To simplify the serial port design, the ADS8201 offers  
a high-speed, wide-voltage serial interface. The  
ADS8201 is ideal for sensor applications (for  
example, bridge sensors, pressure sensors,  
accelerometers, gyrosensors, temperature sensors,  
etc.) as used in gaming and navigation.  
Mixed Type Partial Scan  
•
•
Built-in Hardware Features:  
–
–
–
On-chip Conversion Clock (CCLK)  
Hardware/Software Reset  
Programmable Status/Polarity for BUSY/INT  
Flexible I/O:  
–
–
–
–
SPI-/ DSP™-Compatible Serial Interface  
Separate I/O Supply (2.2V to 5.5V)  
Onboard 8×1 FIFO Buffer  
SCLK up to 25MHz (VD = 5V)  
...  
The ADS8201 is available in a 24-lead, 4x4 QFN  
package, and is specified over the –40°C to +85°C  
industrial temperature range.  
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
4
DSP is a trademark of Texas Instruments.  
SPI is a trademark of Motorola Inc.  
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 © 2009–2010, Texas Instruments Incorporated  
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