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ADS1148QPWRQ1 Datasheet(PDF) 1 Page - Texas Instruments |
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ADS1148QPWRQ1 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 80 page  Input Mux 3rd-Order DS Modulator REFP1 REFN1 REFOUT REFCOM 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 SCLK DIN DRDY DOUT/DRDY CS START RESET AVDD IEXC2 Internal Oscillator Voltage Reference Serial Interface and Control V BIAS GPIO CLK ADS1148-Q1 PGA System Monitor Digital Filter IDACs Reference Mux Copyright © 2016, Texas Instruments Incorporated Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. ADS1148-Q1 SBAS674A – JULY 2014 – REVISED SEPTEMBER 2016 ADS1148-Q1 Automotive,16-Bit, 2-kSPS, Analog-to-Digital Converter with Integrated Programmable Gain Amplifier (PGA), Reference, and Oscillator 1 1 Features 1 • Qualified for Automotive Applications • AEC-Q100 Qualified with the Following Results: – Temperature Grade 1: –40°C to +125°C – HBM ESD Classification 2 – CDM ESD Classification C5 • Programmable Gain: 1 V/V to 128 V/V • Programmable Data Rates: 5 SPS to 2 kSPS • Single-Cycle Settling for All Data Rates • Analog Multiplexer With 8 Independently Selectable Inputs • Dual-Matched Programmable Excitation Current Sources: 50 µA to 1.5 mA • Internal 2.048-V Voltage Reference • Internal 4.096-MHz Oscillator • Internal Temperature Sensor • Open Sensor Detection • Power-Supply and External Reference Monitoring • Self and System Calibration • 8 General-Purpose I/Os • SPI-Compatible Serial Interface • Analog Supply: Unipolar (2.7 V to 5.25 V) or Bipolar (±2.5 V) • Digital Supply: 2.7 V to 5.25 V 2 Applications • Thermocouple-, RTD- and Thermistor- Based Temperature Measurement Systems • Exhaust Gas Sensing (Soot, NOx, NH3, O2) • Battery Management Systems (BMS) • Multichannel Voltage and Current Monitoring 3 Description The ADS1148-Q1 is a highly-integrated, precision, 16-bit analog-to-digital converter (ADC) that includes many integrated features to reduce system cost and component count for sensor measurement applications. The device features a low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1148-Q1 integrates a low-drift voltage reference, and two matched programmable excitation current sources (IDACs). The device offers a fully flexible multiplexer that allows both positive and negative inputs to be selected independently. In addition, the multiplexer integrates sensor burn-out detection, voltage bias for thermocouples, system monitoring, and eight general- purpose digital I/Os (GPIOs). The PGA provides selectable gains up to 128 V/V. These features provide a complete front-end solution for temperature sensor measurement applications, including thermocouples, thermistors, and resistance temperature detectors (RTDs), and other small-signal measurements. The digital filter settles in a single cycle to support fast channel cycling when using the input multiplexer and provides data rates up to 2 kSPS. For data rates of 20 SPS or less, both the 50-Hz and 60-Hz interference are rejected by the filter. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) ADS1148-Q1 TSSOP (28) 9.70 mm × 4.40 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Functional Block Diagram |
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