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AD7947BRMRL7 PDF预览

AD7947BRMRL7

更新时间： 2024-09-13 14:49:35
品牌 Logo 应用领域
亚德诺 - ADI 光电二极管转换器
页数 文件大小 规格书
19页 228K
描述
IC 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, MICRO, SOIC-10, Analog to Digital Converter

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AD7947BRMRL7 数据手册

 浏览型号AD7947BRMRL7的Datasheet PDF文件第2页浏览型号AD7947BRMRL7的Datasheet PDF文件第3页浏览型号AD7947BRMRL7的Datasheet PDF文件第4页浏览型号AD7947BRMRL7的Datasheet PDF文件第5页浏览型号AD7947BRMRL7的Datasheet PDF文件第6页浏览型号AD7947BRMRL7的Datasheet PDF文件第7页 
PRELIMINARY TECHNICAL DATA  
14-BIT,500kSPSDifferentialADCin␮SO/CSP  
a
PreliminaryTechnicalData  
AD7947*  
GENERAL DESCRIPTION  
FEATURES  
The AD7947 is a 14-bit, 500kSPS, charge redistribution  
successive-approximation, fully differential Analog-to-  
Digital Converter which operates from a single power  
supply, VDD, between 2V to 5.5V. It contains a very low  
power high-speed 14-bit sampling ADC with no missing  
codes, an internal conversion clock and a versatile serial  
interface port. The part also contains a differential low  
noise, wide bandwidth, very short aperture delay track/  
hold circuit. On the CNV rising edge, it samples the  
؎VREF difference between the two analog input IN+ and  
IN-. The reference voltage REF is applied externally, can  
be set up to the supply voltage.  
14-bit Resolution with No Missing Codes  
Throughput: 500kSPS (Warp mode)  
450kSPS (Normal mode)  
380kSPS (Impulse mode)  
INL: ؎0.25LSB Typ, ؎0.7LSB Max (؎0.0043 % of  
FSR)  
DNL: ؎0.2LSB Typ, ؎0.5LSB Max  
S/(N+D): 85dB Typ @ 20kHz  
THD: –100dB Typ @ 20kHz  
True Differential Analog input range: ؎VREF  
0V to VREF with VREF up to VDD on Both Inputs  
No Pipeline Delay  
Single Supply Operation 2V to 5.5V with  
1.8V/2.5V/3V/5V logic interface  
Daisy Chain Multiple ADCs and Busy Indicator  
Programmable Input Bandwidth  
Serial Interface SPI/QSPI/␮Wire/DSP compatible  
Typical Power Dissipation:  
2mW @ 3V/100kSPS, 20mW @ 5V/380ksps,  
1.6␮W @ 2.5V/100SPS  
Stand-by current: 1 nA Typ  
It features a very high sampling rate mode (Warp) for  
synchronous applications, a fast mode (Normal) for asyn-  
chronous applications and a reduced power mode  
(Impulse) where the power scales linearly with through-  
put.  
The SPI compatible serial interface also features the abil-  
ity, using the SDI input, to “Daisy chain” several ADCs  
on a single 3 wire bus and provides an optional Busy indi-  
cator. It is compatible with 1.8V, 2.5V, 3V or 5V logic  
using the separate supply OVDD.  
10-pin Package: ␮-SOIC ( ␮-SO8 size ) and  
CSP ( 3mm x 3mm same space as SOT-23 )  
Pin-for-Pin Compatible with the 16-bit AD7688  
The AD7947 is housed in a 10-lead ␮SOIC or 10-lead  
CSP (Chip Scale package) with operation specified from  
–40°C to +85°C.  
APPLICATIONS  
Battery Powered Equipment  
Data Acquisition  
Instrumentation  
Medical Instruments  
Process Control  
FUNCTIONAL BLOCK DIAGRAM  
␮SO, CSP/SOT23 16 and 14 Bit ADC  
VDD REF  
Type  
100 kSPS  
250 kSPS  
AD7687  
500 kSPS  
AD7688  
OVDD  
AD7647  
16 Bit True AD7684  
Differential  
16 Bit Pseudo AD7683  
Differential  
16 Bit Unipolar AD7680  
14 Bit True  
IN+  
SWITCHED  
CAP DAC  
SDI  
IN-  
AD7685  
AD7686  
SCK  
CONTROL  
LOGIC  
SDO  
CNV  
CLOCK  
GND  
AD7944  
AD7942  
AD7947  
AD7946  
Differential  
14 Bit Pseudo  
Differential  
14 Bit Unipolar AD7940  
*Patent pending.  
REV. Pr 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  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 2004  
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