V62/09626-01XE

16通道， 24位模拟数字转换器 16-CHANNEL, 24-BIT ANALOG-TO-DIGITAL CONVERTER

DESCRIPON

The ADS1258 is a 16-channel multiplexed, low-noise, 24-bit, delta-sigma ΔΣ analog-to-digital converter ADC that provides single-cycle settled data at channel scan rates from 1.8k to 23.7k samples per second SPS per channel. A flexible input multiplexer accepts combinations of eight differential or 16 single-ended inputs with a full-scale differential range of 5 V or true bipolar range of ±2.5 V when operating with a 5-V reference. The fourth-order delta-sigma modulator is followed by a fifth-order sinc digital filter optimized for low-noise performance.

FEATURES

• 24 Bits, No Missing Codes

• Fixed-Channel or Automatic Channel Scan

• Fixed-Channel Data Rate: 125 kSPS

• Auto-Scan Data Rate: 23.7 kSPS/Channel

• Single-Conversion Settled Data

• 16 Single-Ended or 8 Differential Inputs

• Unipolar 5 V or Bipolar ±2.5 V Operation

• Low Noise: 2.8 μVRMS at 1.8kSPS

• 0.0003% Integral Nonlinearity

• DC Stability typical: 0.02 μV/°C Offset Drift, 0.4 ppm/°C Gain Drift

• Open-Sensor Detection

• Conversion Control Pin

• Multiplexer Output for External Signal Conditioning

• On-Chip Temperature, Reference, Offset, Gain,and Supply Voltage Readback

• 42-mW Power Dissipation

• Standby, Sleep, and Power-Down Modes

• 8 General-Purpose Inputs/Outputs GPIO

• 32.768-kHz Crystal Oscillator or External Clock