ADS8881 - Texas Instruments

ADS8881 SAR Analog-to-Digital Converter

The ADS8881 is an 18-bit, 1-MSPS, 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 SP.

Features

•1 Sample Rate: 1 MHz
• 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:
  – ADS8881C: INL: ±1 LSB (typ), ±2.0 LSB (max) DNL: ±1.0 LSB (max), 18-Bit NMC SNR: 100 dB, THD:
  –115 dB
  – ADS8881I: INL: ±1.5 LSB (typ), ±3.0 LSB (max) DNL: +1.5 and
  –1 LSB (max), 18-Bit NMC SNR: 100 dB, THD:
  –115 dB
• Wide Operating Range:
  – AVDD: 2.7 V to 3.6 V
  – DVDD: 2.7 V to 3.6 V (Independent of AVDD)
  – REF: 2.5 V to 5 V (Independ.