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ADS1258IRTCR Datasheet(PDF) 1 Page - Texas Instruments |
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ADS1258IRTCR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 54 page  ADS1258 24−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 ADS1258 Analog Inputs ADS1258 www.ti.com SBAS297G – JUNE 2005 – REVISED MARCH 2011 16-Channel, 24-Bit Analog-to-Digital Converter Check for Samples: ADS1258 1 FEATURES DESCRIPTION The ADS1258 is a 16-channel (multiplexed), 23 • 24 Bits, No Missing Codes low-noise, 24-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 • Low Noise: 2.8 μVRMS at 1.8kSPS digital filter optimized for low-noise performance. • 0.0003% Integral Nonlinearity The differential output of the multiplexer is accessible • DC Stability (typical): to allow signal conditioning prior to the input of the 0.02 μV/°C Offset Drift, 0.4ppm/°C Gain Drift ADC. Internal system monitor registers provide • Open-Sensor Detection supply voltage, temperature, reference voltage, gain, and offset data. • Conversion Control Pin • Multiplexer Output for External Signal An onboard PLL generates the system clock from a 32.768kHz crystal, or can be overridden by an Conditioning external clock source. A buffered system clock output • On-Chip Temperature, Reference, Offset, Gain, (15.7MHz) is provided to drive a microcontroller or and Supply Voltage Readback additional converters. • 42mW Power Dissipation Serial digital communication is handled via an SPI ™ • Standby, Sleep, and Power-Down Modes -compatible interface. A simple command word • 8 General-Purpose Inputs/Outputs (GPIO) structure controls channel configuration, data rates, digital I/O, monitor functions, etc. • 32.768kHz Crystal Oscillator or External Clock Programmable sensor bias current sources can be APPLICATIONS used to bias sensors or verify sensor integrity. • Medical, Avionics, and Process Control The ADS1258 operates from a unipolar +5V or • Machine and System Monitoring bipolar ±2.5V analog supply and a digital supply compatible with interfaces ranging from 2.7V to • Fast Scan Multi-Channel Instrumentation 5.25V. The ADS1258 is available in a QFN-48 • Industrial Systems package. • Test and Measurement Systems 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 © 2005–2011, 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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