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ADS1158IRTCRG4 bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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1 / 53 page ADS1158 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 SBAS429D – JUNE 2008 – REVISED MARCH 2011 16-Channel, 16-Bit Analog-to-Digital Converter Check for Samples: ADS1158 1 FEATURES DESCRIPTION The ADS1158 is a 16-channel (multiplexed), 23 • 16 Bits, No Missing Codes 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 samples per second (SPS) per channel. A flexible • Auto-Scan Data Rate: 23.7kSPS/Channel input multiplexer accepts combinations of eight • Single-Conversion Settled Data 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 when operating with a 5V reference. The fourth-order • Unipolar (+5V) or Bipolar ( ±2.5V) Operation delta-sigma modulator is followed by a fifth-order sinc • 0.3LSB (INL) digital filter optimized for low-noise performance. • DC Stability: The differential output of the multiplexer is accessible 1 μV/°C Offset Drift, 2ppm/°C Gain Drift 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, and offset data. • Multiplexer Output for External Signal Conditioning An onboard PLL generates the system clock from a 32.768kHz crystal, or can be overridden by an • On-Chip Temperature, Reference, Offset, Gain, external clock source. A buffered system clock output and Supply Voltage Readback (15.7MHz) is provided to drive a microcontroller or • 42mW Power Dissipation 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. APPLICATIONS 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 compatible with interfaces ranging from 2.7V to • Industrial Systems 5.25V. The ADS1158 is available in a QFN-48 • Test and Measurement Systems 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 © 2008–2011, 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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