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ADS1218Y250G4 bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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ADS1218Y250G4 bảng dữ liệu(HTML) 1 Page - Texas Instruments |
1 / 45 page BurrBrown Products from Texas Instruments FEATURES APPLICATIONS DESCRIPTION BUF PGA + 1.25V or 2.5V Reference Clock Generator Registers Serial Interface 2nd−Order Modulator RAM 4K Bytes FLASH AGND AV DD R DAC V REFOUT V RCAP V REF+ V REF − X IN X OUT DSYNC PDWN RESET DRDY BUFEN DGND DV DD WREN Digital I/O Interface D7 ... D0 SCLK POL D IN D OUT CS MUX A IN0 A IN1 A IN2 A IN3 A IN4 A IN5 A IN6 A IN7 A INCOM IDAC1 Controller P rogram− mable Digital F ilter 8−Bit IDAC IDAC2 8−Bit IDAC Offset DAC ADS1218 SBAS187C – SEPTEMBER 2001 – REVISED SEPTEMBER 2005 8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER with FLASH Memory The eight input channels are multiplexed. Internal buffering can be selected to provide a very high input • 24 BITS NO MISSING CODES impedance for direct connection to transducers or • 0.0015% INL low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or • 22 BITS EFFECTIVE RESOLUTION (PGA = 1), shorted sensor. An 8-bit Digital-to-Analog (D/A) 19 BITS (PGA = 128) converter provides an offset correction with a range • 4K BYTES OF FLASH MEMORY of 50% of the FSR (Full-Scale Range). PROGRAMMABLE FROM 2.7V TO 5.25V The PGA (Programmable Gain Amplifier) provides • PGA FROM 1 TO 128 selectable gains of 1 to 128 with an effective • SINGLE CYCLE SETTLING MODE resolution of 19 bits at a gain of 128. The A/D • PROGRAMMABLE DATA OUTPUT RATES UP conversion is accomplished with a second-order TO 1kHz delta-sigma modulator and programmable sinc filter. The reference input is differential and can be used for • PRECISION ON-CHIP 1.25V/2.5V REFERENCE: ratiometric conversion. The on-board current DACs ACCURACY: 0.2% (Digital-to-Analog Converters) operate independently DRIFT: 5ppm/°C with the maximum current set by an external resistor. • EXTERNAL DIFFERENTIAL REFERENCE OF The serial interface is SPI-compatible. Eight bits of 0.1V TO 2.5V digital I/O are also provided that can be used for input • ON-CHIP CALIBRATION or output. The ADS1218 is designed for • PIN-COMPATIBLE WITH ADS1216 high-resolution measurement applications in smart transmitters, industrial process control, weight scales, • SPI™ COMPATIBLE chromatography, and portable instrumentation. • 2.7V TO 5.25V • < 1mW POWER CONSUMPTION • INDUSTRIAL PROCESS CONTROL • LIQUID/GAS CHROMATOGRAPHY • BLOOD ANALYSIS • SMART TRANSMITTERS • PORTABLE INSTRUMENTATION • WEIGHT SCALES • PRESSURE TRANSDUCERS The ADS1218 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution and Flash memory operating from 2.7V to 5.25V supplies. The delta-sigma, A/D converter provides up to 24 bits of no missing code performance and effective resolution of 22 bits. 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. SPI is a trademark of Motorola. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2001–2005, 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. |
Số phần tương tự - ADS1218Y250G4 |
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Mô tả tương tự - ADS1218Y250G4 |
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