ADS8598H - 18-Bit 500kSPS 8-Channel Simultaneous-Sampling ADC With Bipolar Inputs on a Single Supply

The ADS8598H device is an 8-channel, integrated data acquisition (DAQ) system based on a 18-bit successiveapproximation (SAR) analog-to-digital converter (ADC). All input channels are simultaneouslysampled to achieve a maximum throughput of 500 kSPSper channel. The device features a complete analog front-end (AFE) 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 ADS8598H can be configured to accept ±10-V or ±5-V true bipolarinputs using a single 5-V supply. The high input impedance allows direct connection with sensorsand transformers, thus eliminating the need for external driver circuits. The high performance andaccuracy, along with zero-latency conversions offered by this device, also makes theADS8598H a great choice for many industrial automation and controlapplications.

• 18-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 I/O Supply
• Overvoltage Input Clamp With 9-kV ESD
• Low-Drift, On-Chip Reference (2.5 V) and Buffer
• Excellent Performance:
  • 500-kSPS Max Throughput on All Channels
  • DNL: ±0.5 LSB Typ; INL: ±2.0 LSB Typ
  • SNR: 94 dB Typ; THD: −109 dB Typ
• Over Temperature 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: LQFP-64

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