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1、1FEATURESDESCRIPTION APPLICATIONS CDAC?1 CDAC?2 SAR?Register?1/2 S/H S/H Comparator Comparator CDAC?3 CDAC?4 SAR?Register?3/4 S/H S/H Comparator Comparator CDAC?5 CDAC?6 SAR?Register?5/6 String?DAC Clock Generator S/H S/H Comparator Comparator Internal?2.5V Reference I/O Control Logic Config Registe
2、r CH_A0 CONVST_A CH_A1 AGND AGND REFC_A CH_B0 CONVST_B CH_B1 AGND AGND REFC_B CH_C0 CONVST_C CH_C1 AGND AGND REFC_C REF IO_ HVSS AVDD AGND ADS8556 ADS8557 ADS8558 Buffer Buffer Buffer Buffer HVDD BVDD BGND HW/SW REF/WR EN STBY RESET RANGE/XCLK BUSY/INT DB15:0 WORD/BYTE PAR/SER RD CS/FS ADS8556 ADS85
3、57 ADS8558 . SBAS404AOCTOBER 2006REVISED AUGUST 2009 16-, 14-, 12-Bit, Six-Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTERS 2Family of 16-, 14-, 12-Bit, Pin- and The ADS8556/7/8 contain six low-power, 16-, 14-, or Software-Compatible ADCs 12-bit,successiveapproximationregister(SAR) based
4、analog-to-digital converters (ADCs) with true Six SAR ADCs Grouped in Three Pairs bipolarinputs.Eachchannelcontainsa Maximum Data Rate Per Channel with Internal sample-and-holdcircuitthatallowssimultaneous Conversion Clock and Reference: high-speed multi-channel signal acquisition. ADS8556: 630kSPS
5、(PAR) or 450kSPS (SER) TheADS8556/7/8supportdataratesofupto ADS8557: 670kSPS (PAR) or 470kSPS (SER) 730kSPS in parallel interface mode or up to 500kSPS ADS8558: 730kSPS (PAR) or 500kSPS (SER) if the serial interface is used. The bus width of the Maximum Data Rate with External Conversion parallel in
6、terface can be set to eight or 16 bits. In Clock and Reference: serial mode, up to three output channels can be 800kSPS (PAR) or 530kSPS (SER) activated. Pin-Selectable or Programmable Input Voltage The ADS8556/7/8 is specified over the full industrial Ranges: Up to 12V temperaturerangeof40Cto+125Ca
7、ndis Excellent Signal-to-Noise Performance:available in an LQFP-64 package. 91.5dB (ADS8556) 85dB (ADS8557) 73.9dB (ADS8558) Programmable and Buffered Internal Reference: 0.5V to 2.5V and 0.5V to 3.0V Comprehensive Power-Down Modes: Deep Power-Down (Standby Mode) Partial Power-Down Auto-Nap Power-Do
8、wn Selectable Parallel or Serial Interface Operating Temperature Range: 40C to +125C LQFP-64 Package Power Quality Measurement Protection Relays Multi-Axis Motor Control Programmable Logic Controllers Industrial Data Acquisition 1 Please be aware that an important notice concerning availability, sta
9、ndard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright 20062009,
10、Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. ABSOLUTE MAXIMUM RATINGS(1) ADS8556 ADS8557 ADS8558 SBAS404AOCTOBER 2006REVISED AUGUST 2009 This i
11、ntegrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device fai
12、lure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PACKAGE/ORDERING INFORMATION(1) RESOLUTIONPACKAGE-PACKAGEORDERINGTRANSPORT PRODUCT(Bits)LEADDESIGNATORNUMBERMEDIA, QUANTITY ADS
13、8556IPMTray, 160 ADS8556I16LQFP-64PM ADS8556IPMRTape and Reel, 1000 ADS8557IPMTray, 160 ADS8557I14LQFP-64PM ADS8557IPMRTape and Reel, 1000 ADS8558IPMTray, 160 ADS8558I12LQFP-64PM ADS8558IPMRTape and Reel, 1000 (1)For the most current package and ordering information see the Package Option Addendum a
14、t the end of this document, or see the TI web site at . Over operating free-air temperature range, unless otherwise noted. ADS8556, ADS8557, ADS8558UNIT Supply voltage, HVDD to AGND0.3 to +18V Supply voltage, HVSS to AGND18 to +0.3V Supply voltage, AVDD to AGND0.3 to +6V Supply voltage, BVDD to BGND
15、0.3 to +6V Analog input voltageHVSS 0.3 to HVDD + 0.3V Reference input voltage with respect to AGNDAGND 0.3 to AVDD + 0.3V Digital input voltage with respect to BGNDBGND 0.3 to BVDD + 0.3V Ground voltage difference AGND to BGND0.3V Input current to all pins except supply10 to +10mA Maximum virtual j
16、unction temperature, TJ+150C Human body model (HBM) 2000V JEDEC standard 22, test method A114-C.01, all pins ESD ratings Charged device model (CDM) 500V JEDEC standard 22, test method C101, all pins (1)Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended op
