ADS8168 - 8-channel 16-bit 1MSPS SAR ADC with easy-to-drive analog inputs

The ADS816x is afamily of 16-bit, 8-channel, high-precision successiveapproximation register (SAR) analog-to-digital converters (ADCs) operating from a single 5-V supplywith a 1-MSPS (ADS8168),
500-kSPS (ADS8167), and 250-kSPS (ADS8166) total throughput.

The input multiplexer supports extended settling time, which makes driving the analoginputs easier. The output of the multiplexer and ADC analog inputs are available as device pins.This configuration allows one ADC driver op amp to be used for all eight analog inputs of themultiplexer. The ADS816x simplifies data processing with an enhanced channelsequencer that reduces software complexity.

The ADS816x features adigital window comparator with programmable high and low alarm thresholds with hysteresis peranalog input channel. The single op-amp solution with programmable alarm thresholds enables lowpower, low cost, and smallest form-factor applications.

• Compact Low-Power Data Acquisition System:
  • MUX Breakout Enables Single External Driver Amplifier
  • Single-Supply Operation
  • 16-Bit SAR ADC
  • Low Drift Integrated Reference and Buffer
  • 0.5 × V_REF Output for Analog Input DC Biasing
• Excellent AC and DC Performance:
  • SNR: 92-dB, THD: –110-dB
  • INL: ±0.3-LSB, 16-Bit No Missing Codes
• Low Leakage Multiplexer With Sequencer:
  • Multiple Channel Sequencing Options:
    • Manual Mode, On-the-Fly Mode, Auto Sequence Mode, Custom Channel Sequencing
  • Early Switching Enables Direct Sensor Interface
  • Fast Response Time With On-the-Fly Mode
• System Monitoring Features:
  • Per Channel Programmable Window Comparator
  • Alert Output for MCU Interrupt
  • False Trigger Avoidance With Programmable Hysteresis
• Enhanced-SPI Digital Interface:
  • 1-MSPS Throughput With 16-MHz SCLK
  • High-Speed, 70-MHz Digital Interface
• Wide Temperature Range: –40°C to +125°C

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