RSS订阅ADS8557
贡献者：sky2009 浏览：2439次 创建时间：2010-04-12
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TI 公司的ADS8557是6路14位SAR ADC,具有真正的双极输入.每路包含了取样保持电路,允许进行高速多路信号采集. ADS8557支持并行接口模式的数据速率高达730KSPS,总线宽度8到16位,串行接口模式的速率高达500KSPS.工作电压高达±12V ,具有极好的信噪比: ADS8557为85dB
主要用于电源品质测量,保护继电器,多轴马达控制和可编逻辑控制器.本文介绍了ADS8557主要特性, 方框图以及并行接口模式的ADS8557最低配置框图.
The ADS8557 contain six low-power,16-,14-,or 12-bit,successive approximation register (SAR) based analog-to-digital converters (ADCs) with true bipolar inputs. Each channel contains a sample-and-hold circuit that allows simultaneous high-speed multi-channel signal acquisition.
The ADS8557 support data rates of up to 730kSPS in parallel interface mode or up to 500kSPS if the serial interface is used. The bus width of the parallel interface can be set to eight or 16 bits. In serial mode, up to three output channels can be activated.
The ADS8556/7/8 is specified over the full industrial temperature range of -40℃ to +125℃ and is available in an LQFP-64 package.
ADS8557主要特性:
Family of 16-, 14-, 12-Bit, Pin- and Software-Compatible ADCs
Six SAR ADCs Grouped in Three Pairs
Maximum Data Rate Per Channel with Internal Conversion Clock and Reference:
ADS8557: 670kSPS (PAR) or 470kSPS (SER)
Maximum Data Rate with External Conversion Clock and Reference:
800kSPS (PAR) or 530kSPS (SER)
Pin-Selectable or Programmable Input Voltage Ranges: Up to ±12V
Excellent Signal-to-Noise Performance:
85dB (ADS8557)
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-Down
Selectable Parallel or Serial Interface
Operating Temperature Range: -40°C to +125°C
LQFP-64 Package
ADS8557应用:
Power Quality Measurement
Protection Relays
Multi-Axis Motor Control
Programmable Logic Controllers
Industrial Data Acquisition
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参考资料
http://www.eaw.com.cn/news/newsdisplay/article/32187
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