ADS8686S

• 16-channel, 16-bit ADC with integrated analog front-end
• Dual simultaneous sampling: 8x2 channels
• Supply:
  • Analog: 5 V
  • Digital: 1.8 V to 5 V
• Constant 1-MΩ input impedance front-end
• Independently programmable input ranges with 20% overrange
• Programmable low-pass filter:
  • 15 kHz, 39 kHz, 376 kHz
• Excellent DC and AC performance
• On-chip reference and reference buffer
• Excellent over temperature performance
• Overvoltage input clamp with 8-kV ESD
• Optional cyclic redundancy check (CRC) error checking
• On-chip self diagnostic function
• Temperature range: –40°C to +125°C

The ADS8686S is a 16-channel data acquisition (DAQ) system based on a dual simultaneous-sampling, 16-bit successive approximation register (SAR) analog-to-digital converter (ADC). The ADS8686S features a complete analog front-end for each channel with an input clamp, 1-MΩ input impedance, independently programmable gain amplifier (PGA), programmable low-pass filter, and an ADC input driver. The device also features a low-drift, precision reference with a buffer to drive the ADCs. A flexible digital interface supporting serial, parallel, and byte communication enables the device to be used with a variety of host controllers.

The ADS8686S can be configured to accept ±10-V, ±5-V, or ±2.5-V bipolar inputs with a 20% overrange option using a single 5-V supply. The high input impedance allows direct connection with sensors and transformers, thus eliminating the need for external driver circuits. The ADS8686S has a highly configurable channel sequencer to reduce the sequencing overhead on the backend controller or processor. The high performance and accuracy, along with zero-latency conversions offered by this device make the ADS8686S a great choice for multiple industrial applications.