Texas Instruments

ADS8881 SAR ADC

Texas Instruments' 18-bit, 1 MSPS, serial interface, microPower, truly-differential input, SAR ADC

Image of Texas Instruments' ADS8881 SAR Analog-to-Digital ConverterTexas Instruments' ADS8881 is an 18-bit, 1 MSPS, true-differential input, analog-to-digital converter (ADC). The device operates with a 2.5 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).

Features  
  • 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
  • Wide operating range
  • Power-down current (AVDD): 50 nA
  • Full-scale step settling to 18 bits: 290 ns
  • 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

Evaluation Module

ImageManufacturer Part NumberDescriptionNumber of BitsSampling Rate (Per Second)Data InterfaceAvailable QuantityPriceView Details
EVAL MODULE FOR ADS8881ADS8881EVM-PDKEVAL MODULE FOR ADS8881181MSPI0 - Immediate$182.84View Details
Published: 2014-09-10

Related Product Highlight

ADS892xB SAR Analog-to-Digital Converters (ADCs) TI's ADS8920B, ADS8922B, and ADS8924B (ADS892xB) belong to a family of pin-to-pin compatible, high-speed, high-precision successive approximation register (SAR) based ADCs.
ADS891xB 18-Bit, 1 MSPS, SAR ADCs Texas Instruments' high speed, high precision ADS891xB SAR ADCs have a wide temperature operating range and a small footprint to help designers to save space.
REF62xx High-Precision Voltage References Texas Instruments' REF62xx high-precision voltage references are designed for applications such as medical equipment, ATE testers, and oscilloscopes.