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ADS8634SRGET bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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ADS8634SRGET bảng dữ liệu(HTML) 1 Page - Texas Instruments |
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1 / 76 page  MUX SPI AIN0 AGND AVDD DVDD REF REF HVDD HVSS Alarm Threshold Comparator AL_PD CS, SCLK, DIN, DOUT DGND AINGND ADC REFGND AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 ADS8638 Temp Sensor MUX SPI AIN0 AGND AVDD DVDD REF HVDD HVSS Temp Sensor Alarm Threshold Comparator AL_PD CS, SCLK, DIN, DOUT DGND AINGND ADC REFGND AIN1 AIN2 AIN3 ADS8634 REF ADS8634 ADS8638 www.ti.com SBAS541A – MAY 2011 – REVISED AUGUST 2011 12-Bit, 1MSPS, 4-/8-Channel, Bipolar-Input, SAR Analog-to-Digital Converter with Software-Selectable Ranges Check for Samples: ADS8634, ADS8638 1 FEATURES DESCRIPTION The ADS8634 and ADS8638 (ADS8634/8) are 12-bit 23 • Selectable Input Range: analog-to-digital converters (ADCs) capable of ±10V, ±5V, ±2.5V, 0V to 10V, or measuring inputs up to ±10V at 1MSPS. Using a 0V to 5V successive approximation register (SAR) core, these Up to ±12V with External Reference ADCs provide a sample-and-hold front-end with no • No Latent Conversions Up to 1MSPS latency in conversions. The ADS8634 includes an input multiplexer (mux) for measuring up to four • Outstanding Performance: inputs. The ADS8638 can measure up to eight inputs. 12 Bits No Missing Codes INL: ±0.9LSB In addition to the input multiplexer, the ADS8634/8 SNR: 71.8dB feature an internal temperature sensor, voltage reference, and a digital comparator for setting alarm • Highly Integrated: thresholds on each input; therefore, a minimal 4- or 8-Channel Input Mux amount of external components are required. A Temperature Sensor simple SPI-compatible interface provides for Internal Voltage Reference communication and control. The digital supply Alarm Thresholds for Each Channel operates from 5V all the way down to 1.8V for direct • Low Power: connection to a wide range of processors and 14.45mW at 1MSPS controllers. 5.85mW at 0.1MSPS Ideal for demanding industrial measurement Flexible Power-Down Mode applications, the ADS8634/8 are fully specified over • SPI ™-Compatible Serial Interface the extended industrial temperature range of –40°C to +125 °C and are available in a small form-factor • Extended Temperature Range: QFN-24 package. –40°C to +125°C • Small Footprint: 4mm × 4mm QFN Package APPLICATIONS • Industrial Process Controls (PLC) • Data Acquisition Systems • High-Speed, Closed-Loop Systems • Digital Power Supplies 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 SPI is a trademark of Motorola. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2011, 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. |
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