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ADS1158IRTCR Datasheet(PDF) 1 Page - Texas Instruments |
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ADS1158IRTCR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 50 page  ADS1158 1 FEATURES DESCRIPTION APPLICATIONS 16-Bit ADC Digital Filter Internal Monitoring 16:1 Analog Input MUX 1 16 AINCOM ADC IN ExtCLK In/Out AVSS DGND 32.768kHz AVDD DVDD MUX OUT SPI Interface CS DRDY SCLK DIN DOUT Control Oscillator GPIO START RESET PWDN GPIO[7:0] V REF ADS1158 AnalogInputs ADS1158 www.ti.com ............................................................................................................................................................. SBAS429A – JUNE 2008 – REVISED JUNE 2008 16-Channel, 16-Bit Analog-to-Digital Converter 23 • 16 Bits, No Missing Codes The ADS1158 is a 16-channel (multiplexed), low-noise, 16-bit, delta-sigma ( ΔΣ) analog-to-digital • Fixed-Channel or Automatic Channel Scan converter (ADC) that provides single-cycle settled • Fixed-Channel Data Rate: 125kSPS data at channel scan rates from 1.8k to 23.7k • Auto-Scan Data Rate: 23.7kSPS/Channel samples per second (SPS) per channel. A flexible • Single-Conversion Settled Data input multiplexer accepts combinations of eight differential or 16 single-ended inputs with a full-scale • 16 Single-Ended or 8 Differential Inputs differential range of 5V or true bipolar range of ±2.5V • Unipolar (+5V) or Bipolar (±2.5V) Operation when operating with a 5V reference. The fourth-order • 0.3LSB (INL) delta-sigma modulator is followed by a fifth-order sinc digital filter optimized for low-noise performance. • DC Stability: 0.02 µV/°C Offset Drift, 0.4ppm/°C Gain Drift The differential output of the multiplexer is accessible to allow signal conditioning before the input of the • Open-Sensor Detection ADC. Internal system monitor registers provide • Conversion Control Pin supply voltage, temperature, reference voltage, gain, • Multiplexer Output for External Signal and offset data. Conditioning An onboard PLL generates the system clock from a • On-Chip Temperature, Reference, Offset, Gain, 32.768kHz crystal, or can be overridden by an and Supply Voltage Readback external clock source. A buffered system clock output • 42mW Power Dissipation (15.7MHz) is provided to drive a microcontroller or additional converters. • Standby, Sleep, and Power-Down Modes Serial digital communication is handled via an • Eight General-Purpose Inputs/Outputs (GPIO) SPI™-compatible interface. A simple command word • 32.768kHz Crystal Oscillator or External Clock structure controls channel configuration, data rates, digital I/O, monitor functions, etc. Programmable sensor bias current sources can be • Medical, Avionics, and Process Control used to bias sensors or verify sensor integrity. • Machine and System Monitoring The ADS1158 operates from a unipolar +5V or • Fast Scan Multi-Channel Instrumentation bipolar ±2.5V analog supply and a digital supply • Industrial Systems compatible with interfaces ranging from 2.7V to • Test and Measurement Systems 5.25V. The ADS1158 is available in a QFN-48 package. 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, 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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