ADS8578S - 14-Bit High-Speed 8-Channel Simultaneous-Sampling ADC With Bipolar Inputs on a Single Supply

The ADS8578S device is an 8-channel, integrated dataacquisition (DAQ) system based on a 14-bit successive approximation (SAR) analog-to-digitalconverter (ADC). All input channels are simultaneously sampled to achieve a maximum throughput of200 kSPS per channel. The device features a complete analog front-end for each channel, including aprogrammable gain amplifier (PGA) with high input impedance of 1 MΩ, input clamp,low-pass filter, and an ADC input driver. The device also features a low-drift, precision referencewith a buffer to drive the ADC. A flexible digital interface supporting serial, parallel, andparallel byte communication enables the device to be used with a variety of hostcontrollers.

The ADS8578S can be configured to accept ±10-V or ±5-V truebipolar inputs using a single 5-V supply. The high input impedance allows direct connection withsensors and transformers, thus eliminating the need for external driver circuits. The highperformance and accuracy, along with zero-latency conversions offered by this device, also make theADS8578S a great choice for many industrial automation and controlapplications.

• 14-Bit ADC With Integrated Analog Front-End
• Simultaneous Sampling: 8 Channels
• Pin-Programmable Bipolar Inputs: ±10 V and ±5 V
• High Input Impedance: 1 MΩ
• 5-V Analog Supply: 2.3-V to 5-V Digital Supply
• Overvoltage Input Clamp With 7-kV ESD
• Low-Drift, On-Chip Reference (2.5 V) and Buffer
• Excellent Performance:
  • 200-kSPS Max Throughput per Channels
  • DNL: ±0.2 LSB; INL: ±0.2 LSB
  • SNR: 85.8 dB; THD: −109 dB
• Overtemperature Performance:
  • Max Offset Drift: 3 ppm/°C
  • Gain Drift: 6 ppm/°C
• On-Chip Digital Filter for Oversampling
• Flexible Parallel, Byte, and Serial Interface
• Temperature Range: –40°C to +125°C
• Package: 64-Pin LQFP

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