ADS8863 - 16-Bit, 680-kSPS, Serial Interface, Micro-Power, Miniature, Differential Input SAR ADC

Updated : 2020-01-09 14:28:21
Description

The ADS8863 is a 16-bit, 680-kSPS, true-differential input, analog-to-digital converter (ADC). The device operates with a 2.5-V to 5-V external reference, offering a wide selection of signal ranges without additional input signal scaling. The reference voltage setting is independent of, and can exceed, the analog supply voltage (AVDD).

The device offers an SPI-compatible serial interface that also supports daisy-chain operation for cascading multiple devices. An optional busy-indicator bit makes synchronizing with the digital host easy.

The device supports unipolar, true-differential analog input signals with a differential input swing of –VREF to +VREF. This true-differential analog input structure allows for a common-mode voltage of any value in the range of 0 V to +VREF (when both inputs are within the operating input range of –0.1 V to VREF + 0.1 V).

Device operation is optimized for very low-power operation. Power consumption directly scales with speed. This feature makes the ADS8863 excellent for lower-speed applications.

Products containing the "ADS8863" keyword are: ADS8863IDGS , ADS8863IDGS , ADS8863IDGSR , ADS8863IDGSR , ADS8863IDRCR , ADS8863IDRCT , ADS8863IDRCT
Features

  • Sample Rate: 680 kHz
  • No Latency Output
  • Unipolar, True-Differential Input Range:
    –VREF to +VREF
  • Wide Common-Mode Voltage Range:
    0 V to VREF with 90-dB CMRR (min)
  • SPI™-Compatible Serial Interface with
    Daisy-Chain Option
  • Excellent AC and DC Performance:
    • SNR: 96 dB, THD: –115 dB
    • INL: ±1.0 LSB (max)
    • DNL: ±1.0 LSB (max), 16-Bit NMC
  • Wide Operating Range:
    • AVDD: 2.7 V to 3.6 V
    • DVDD: 1.65 V to 3.6 V
      (Independent of AVDD)
    • REF: 2.5 V to 5 V (Independent of AVDD)
    • Operating Temperature: –40°C to +85°C
  • Low-Power Dissipation:
    • 4.2 mW at 680 kSPS
    • 0.6 mW at 100 kSPS
    • 60 µW at 10 kSPS
  • Power-Down Current (AVDD): 50 nA
  • Full-Scale Step Settling to 16 Bits: 540 ns
  • Packages: MSOP-10 and SON-10