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ADS1147 Datasheet(PDF) 1 Page - Texas Instruments |
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ADS1147 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 67 page Input Mux 3rdOrder DS Modulator REFP REFN PGA Burnout Detect Burnout Detect DVDD DGND ADS1146 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 ADS1148 Only SCLK DIN DRDY DOUT/DRDY CS START RESET AVDD IEXC2 InternalOscillator Voltage Reference Serial Interface and Control V BIAS GPIO CLK ADS1148 Only ADS1147 ADS1148 PGA System Monitor Adjustable Digital Filter Dual Current DACs VREFMux ADS1148 Only V BIAS ADS1146 ADS1147 ADS1148 www.ti.com SBAS453F – JULY 2009 – REVISED APRIL 2012 16-Bit Analog-to-Digital Converters for Temperature Sensors Check for Samples: ADS1146, ADS1147, ADS1148 1 FEATURES DESCRIPTION The ADS1146, ADS1147, and ADS1148 are highly- 23 • 16 Bits, No Missing Codes integrated, precision, 16-bit analog-to-digital • Data Output Rates Up to 2kSPS converters (ADCs). The ADS1146/7/8 feature an • Single-Cycle Settling for All Data Rates onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma ADC with a single- • Simultaneous 50/60Hz Rejection at 20SPS cycle settling digital filter, and an internal oscillator. • 4 Differential/7 Single-Ended Inputs (ADS1148) The ADS1147 and ADS1148 also provide a built-in • 2 Differential/3 Single-Ended Inputs (ADS1147) voltage reference with 10mA output capacity, and two matched programmable current digital-to-analog • Matched Current Source DACs converters (DACs). The ADS1146/7/8 provide a • Internal Voltage Reference complete front-end solution for temperature sensor • Sensor Burnout Detection applications including thermal couples, thermistors, and resistance temperature detectors (RTDs). • 4/8 General-Purpose I/Os (ADS1147/8) • Internal Temperature Sensor An input multiplexer supports four differential inputs for the ADS1148, two for the ADS1147, and one for • Power Supply and VREF Monitoring the ADS1146. In addition, the multiplexer has a (ADS1147/8) sensor burnout detect, voltage bias for • Self and System Calibration thermocouples, system monitoring, and general- • SPI™-Compatible Serial Interface purpose digital I/Os (ADS1147 and ADS1148). The onboard, low-noise PGA provides selectable gains of • Analog Supply Operation: 1 to 128. The delta-sigma modulator and adjustable +2.7V to +5.25V Unipolar, ±2.5V Bipolar digital filter settle in only one cycle, for fast channel • Digital Supply: +2.7V to +5.25V cycling when using the input multiplexer, and support • Operating Temperature –40°C to +125°C data rates up to 2kSPS. For data rates of 20SPS or less, both 50Hz and 60Hz interference are rejected by the filter. APPLICATIONS • Temperature Measurement The ADS1146 is offered in a small TSSOP-16 package, the ADS1147 is available in a TSSOP-20 – RTDs, Thermocouples, and Thermistors package, and the ADS1148 is available in TSSOP-28 • Pressure Measurement and QFN-32 packages. All three devices operate over • Industrial Process Control the extended specified temperature range of –40°C to +105°C. 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 © 2009–2012, 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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