TI ADS8883IDGS

The ADS8883 is an 18-bit, 680kSPS, true differential input ADC. The device operates with an external reference of 2.5V to 5V, providing a wide signal range without additional signal conditioning. This reference voltage setting is independent of, and can exceed, the analog supply voltage (AVDD).

The device provides an SPI-compatible serial interface that also supports daisy-chain operation for cascading multiple devices. An optional busy indicator bit enables easy synchronization with a digital host.

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

Device operation is optimized for ultra-low power consumption. Power dissipation scales directly with speed, making the ADS8883 well-suited for low-speed applications.

• Sample rate: 680kHz
• No-latency output, unipolar, true differential input range: –VREF to +VREF
• Wide common-mode voltage range: 0V to VREF, CMRR 90dB (min)
• SPI-compatible serial interface with daisy-chain option
• Excellent AC and DC performance:
  • SNR: 100dB, THD: –115dB
  • INL: ±1.5 LSB (typical), ±3.0 LSB (max)
  • DNL: +1.5 and -1 LSB (max), 18-bit NMC
• Wide operating range:
  • AVDD: 2.7V to 3.6V
  • DVDD: 1.65V to 3.6V (independent of AVDD)
  • REF: 2.5V to 5V (independent of AVDD)
• Operating temperature: -40°C to +85°C
• Low power dissipation:
  • 4.2mW at 680kSPS
  • 0.6mW at 100kSPS
  • 60μW at 10kSPS
• Power-down current (AVDD): 50nA
• Full-scale step settling to 18 bits: 540ns
• Packages: MSOP-10 and SON-10

• Automatic Test Equipment (ATE)
• Instrumentation and handler cards
• Precision medical equipment
• Low-power, battery-powered instruments