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ADS1248IPWR Datasheet(PDF) 1 Page - Texas Instruments |
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ADS1248IPWR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 60 page  ADS1246 ADS1247 ADS1248 1 FEATURES DESCRIPTION APPLICATIONS Input Mux 3rdOrder DS Modulator REFP REFN PGA Burnout Detect Burnout Detect DVDD DGND ADS1246 AVSS AIN0 AIN1 SCLK DIN DRDY DOUT/DRDY CS START RESET AVDD InternalOscillator Adjustable Digital Filter Serial Interface and Control CLK Input Mux 3rdOrder DS Modulator REFP1 REFN1 VREFOUT VREFCOM REFP0/ GPIO0 REFN0/ GPIO1 Burnout Detect Burnout Detect DVDD DGND IEXC1 AVSS AIN0/IEXC AIN1/IEXC AIN2/IEXC/GPIO2 AIN3/IEXC/GPIO3 AIN4/IEXC/GPIO4 AIN5/IEXC/GPIO5 AIN6/IEXC/GPIO6 AIN7/IEXC/GPIO7 ADS1248 Only SCLK DIN DRDY DOUT/DRDY CS START RESET AVDD IEXC2 InternalOscillator Voltage Reference Serial Interface and Control V BIAS GPIO CLK ADS1248 Only ADS1247 ADS1248 PGA System Monitor Adjustable Digital Filter Dual Current DACs VREFMux ADS1248 Only V BIAS ADS1246 ADS1247 ADS1248 www.ti.com .................................................................................................................................................. SBAS426C – AUGUST 2008 – REVISED AUGUST 2009 24-Bit Analog-to-Digital Converters for Temperature Sensors 23 • 24 Bits, No Missing Codes The ADS1246, ADS1247, and ADS1248 are highly-integrated, precision, 24-bit analog-to-digital • Data Output Rates Up to 2kSPS converters (ADCs). The ADS1246/7/8 feature an • Single-Cycle Settling for All Data Rates onboard, low-noise, programmable gain amplifier • Simultaneous 50/60Hz Rejection at 20SPS (PGA), a precision delta-sigma ADC with a • 4 Differential/7 Single-Ended Inputs (ADS1248) single-cycle settling digital filter, and an internal oscillator. The ADS1247 and ADS1248 also provide a • 2 Differential/3 Single-Ended Inputs (ADS1247) built-in, very low drift voltage reference with 10mA • Low-Noise PGA: 48nV at PGA = 128 output capacity, and two matched programmable • Matched Current Source DACs current digital-to-analog converters (DACs). The ADS1246/7/8 provide a complete front-end solution • Very Low Drift Internal Voltage Reference: for temperature/bridge sensor applications including 10ppm/°C (max) thermal couples, thermistors, RTDs, and strain-gauge • Sensor Burnout Detection applications. • 4/8 General-Purpose I/Os (ADS1247/48) An input multiplexer supports four differential inputs • Internal Temperature Sensor for the ADS1248, two for the ADS1247, and one for the ADS1246. In addition, the multiplexer has a • Power Supply and V REF Monitoring sensor burnout detect, voltage bias for (ADS1247/48) thermocouples, system monitoring, and • Self and System Calibration general-purpose digital I/Os (ADS1247 and • SPI™-Compatible Serial Interface ADS1248). The onboard, low-noise PGA provides selectable gains of 1 to 128. The delta-sigma • Analog Supply Unipolar (+2.7V to modulator and adjustable digital filter settle in only +5.25V)/Bipolar (±2.5V) Operation one cycle, for fast channel cycling when using the • Digital Supply: +2.7V to +5.25V input multiplexer, and support data rates up to • Operating Temperature –40°C to +125°C 2kSPS. For data rates of 20SPS or less, both 50Hz and 60Hz interference are rejected by the filter. The ADS1246 is offered in a small TSSOP-16 • Temperature Measurement package, the ADS1247 is available in a TSSOP-20 – RTDs, Thermocouples, and Thermistors package, and the ADS1248 in a TSSOP-28 package. All three devices are rated over the extended • Pressure Measurement specified temperature range of –40°C to +105°C. • Industrial Process Control 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, Inc. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2008–2009, 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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