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ADS7230I

更新时间： 2024-11-25 04:04:43
品牌 Logo 应用领域
德州仪器 - TI 转换器输入元件
页数 文件大小 规格书
46页 1187K
描述
LOW-POWER, 12-BIT, 1MHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE

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ADS7230I 数据手册

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ADS7229  
ADS7230  
www.ti.com........................................................................................................................................................................................................ SBAS437–MAY 2008  
LOW-POWER, 12-BIT, 1MHz, SINGLE/DUAL UNIPOLAR INPUT,  
ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE  
1
FEATURES  
APPLICATIONS  
•
•
•
•
•
•
•
Communications  
23  
•
2.7V to 5.5V Analog Supply, Low Power:  
Transducer Interface  
Medical Instruments  
Magnetometers  
Industrial Process Control  
Data Acquisition Systems  
Automatic Test Equipment  
–
13.7mW (1MHz, +VA = 3V, +VBD = 1.8V)  
•
•
1MHz Sampling Rate 3V ≤ +VA ≤ 5.5V,  
900kHz Sampling Rate 2.7V ≤ +VA ≤ 3V  
Excellent DC Performance:  
–
–
–
–
±0.15LSB Typ, ±0.5LSB Max INL  
±0.12LSB Typ, ±0.5LSB Max DNL  
±0.8mV Max Offset Error at 3V  
±1.25mV Max Offset Error at 5V  
DESCRIPTION  
The ADS7229 is  
a low-power, 12-bit, 1MSPS  
•
Excellent AC Performance at fi = 10kHz with  
73.9dB SNR, 93.4dB SFDR, –88.5dB THD  
analog-to-digital converter (ADC) with a unipolar  
input. The device includes a 12-bit capacitor-based  
successive approximation register (SAR) ADC with  
inherent sample-and-hold.  
•
•
Built-In Conversion Clock (CCLK)  
1.65V to 5.5V I/O Supply:  
The ADS7230 is based on the same core and  
includes a 2-to-1 input MUX with a programmable  
TAG bit output option. Both the ADS7229 and  
ADS7230 offer a high-speed, wide voltage serial  
interface and are capable of daisy-chain mode  
operation when multiple converters are used.  
–
–
SPI™/DSP-Compatible Serial Interface  
SCLK up to 50MHz  
•
Comprehensive Power-Down Modes:  
–
–
–
Deep Power-Down  
Nap Power-Down  
These devices are available in 4 × 4 QFN and  
TSSOP-16 packages, and are fully specified for  
operation over the industrial –40°C to +85°C  
temperature range.  
Auto Nap Power-Down  
•
•
•
•
•
•
•
•
Unipolar Input Range: 0V to VREF  
Software Reset  
Global CONVST (Independent of CS)  
Programmable Status/Polarity EOC/INT  
4 × 4 QFN-16 and TSSOP-16 Packages  
Multi-Chip Daisy-Chain Mode  
Low Power, High-Speed SAR Converter Family  
Type/Speed  
500 kSPS  
ADS8327  
ADS8328  
1 MSPS  
ADS8329  
ADS8330  
ADS7279  
ADS7280  
ADS7229  
ADS7230  
Single  
Dual  
16-bit single-ended  
Programmable TAG Bit Output  
Auto/Manual Channel Select Mode (ADS7230)  
Single  
Dual  
14-bit single-ended  
12-bit single-ended  
Single  
Dual  
OUTPUT  
LATCH  
and  
TRI-STATE  
DRIVER  
ADS7230 ADS7229  
SDO  
SAR  
NC  
+IN1  
+IN0  
COM  
+
_
CDAC  
+IN  
FS/CS  
CONVERSION  
and  
CONTROL  
LOGIC  
SCLK  
SDI  
COMPARATOR  
-IN  
REF+  
REF  
CONVST  
OSC  
EOC/INT/CDI  
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, 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 © 2008, Texas Instruments Incorporated  
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