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Small 8-channel 12-bit analog-to-digital converter (ADC) with SPI interface, GPIOs and CRC

Availability: 15,501


Package | PIN: WQFN (RTE) | 16
Temp: I (-40 to 85)
Package qty | Carrier: 3,000 | LARGE T&R
Qty Price
1-99 $4.37
100-249 $3.92
250-999 $2.80
1,000+ $2.38


  • Small package size:
    • WQFN 3 mm × 3 mm
  • 8 channels configurable as any combination of:
    • Up to 8 analog inputs, digital inputs, or digitaloutputs
  • GPIOs for I/O expansion:
    • Open-drain, push-pull digital outputs
  • Analog watchdog:
    • Programmable thresholds perchannel
    • Event counter for transient rejection
  • Wide operating ranges:
    • AVDD: 2.35 V to 5.5 V
    • DVDD:1.65 V to 5.5 V
    • –40°C to+85°C temperature range
  • Enhanced-SPI digital interface:
    • High-speed, 60-MHz interface
    • Achieve full throughput with >13.5-MHz SPI
  • CRC for read/write operation:
    • CRC on data read/write
    • CRC on power-up configuration
  • Programmable averaging filters
  • Root-mean-square module:
    • 16-bit true RMS output
    • Programmable RMS time window
  • Zero-crossing-detect module:
    • ZCD output corresponding to analoginput
    • Built-in transient rejection andhysteresis
    • Digitally adjustable detection threshold

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Texas Instruments  XADS7028IRTER

The ADS7028 is an easy-to-use,8-channel, multiplexed, 12-bit, 1-MSPS, successive approximation register analog-to-digitalconverter (SAR ADC). The eight channels can be independently configured as either analog inputs,digital inputs, or digital outputs. The device has aninternal oscillator for the ADC conversion process.

The ADS7028 communicates via anSPI-compatible interface and operates in either autonomous or single-shot conversion mode. TheADS7028 implements the analog watchdog function by event-triggeredinterrupts per channel using a digital window comparator with programmable high and low thresholds,hysteresis, and an event counter. The ADS7028 has a built-in cyclicredundancy check (CRC) for data read/write operations and the power-up configuration.The ADS7028 features a root-mean-square (RMS) module that computes a 16-bittrue RMS result for any analog input channel. The integrated zero-crossing-detect (ZCD) moduleallows for transient rejection and hysteresis near the configurable thresholdcrossings.