DESCRIPTION
●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
