12-bit, 8-channel, 1MSPS, SAR ADC with Internal Reference and Internal Temperature Sensor


The ADS8028 is a 12-bit analog-to-digital converter (ADC), capable of operating at sampling speeds up to 1 MSPS. The device is based on a successive approximation register (SAR) core and provides an inherent sample-and-hold (SH) front-end.

In addition to having eight analog input channels, the ADS8028 offers an internal temperature sensor with 0.25°C resolution and an internal voltage reference. A nine-channel internal multiplexer enables multiple channels to be selected (including the internal temperature sensor) that are indefinitely scanned in a sequential manner. A simple SPI-compatible serial interface provides easy communication and control between the device and host controller. The digital supply can operate from 1.65 V to 5.25 V, enabling direct interface with a wide range of processors and controllers.

At full speed of 1 MSPS, the ADS8028 dissipates only 17 mW. The device offers flexible power-down modes to save power when conversions are not being performed. The ADS8028 performance is specified over the extended industrial temperature range of –40°C to +125°C.

The ADS8028 is ideal for demanding measurement applications, such as sensor output monitoring, power-supply monitoring, and printed circuit board (PCB) hot-spot analysis, and is available in a small form-factor QFN-20 package.


  • Outstanding Performance:
    • Throughput: Up to 1 MSPS
    • No Missing Codes: 12 Bits
    • INL: ±0.5 LSB
    • SNR: 72 dB
  • Highly Integrated:
    • Eight Analog Inputs
    • High-Resolution Internal Temperature Sensor
    • Nine-Channel Multiplexer with Channel Sequencer
    • Low-Drift Internal Voltage Reference
  • Wide Supply Range:
    • Analog Supply (AVDD): 2.7 V to 5.25 V
    • Digital Supply (DVDD): 1.65 V to 5.25 V
  • Low Power:
    • 17 mW at 1 MSPS
    • Flexible Power-Down Modes
  • SPI™-Compatible Serial Interface: 20 MHz
  • Small Footprint: 4-mm × 4-mm, Thin QFN-20

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Parametrics Compare all products in Precision ADC (<=10MSPS)

Resolution (Bits)
Sample Rate (max) (SPS)
# Input Channels
Multi-Channel Configuration
Input Range (Min)
Input Range (Max)
Integrated Features
INL (Max) (+/-LSB)
Operating Temperature Range (C)
Approx. Price (US$)
Input Type
THD (Typ) (dB)
SNR (dB)
Reference Mode
Serial SPI    
Temp Sensor    
-40 to 125    
3.25 | 1ku    

Related end equipment

  • Programmable Logic Controls (PLCs)
  • Industrial Process Controls (IPCs)
  • Telecommunications
  • Power-Supply Monitoring
  • PCB Hot-Spot Analysis
  • Battery-Powered Applications

SPI is a trademark of Motorola.
All other trademarks are the property of their respective owners.

WEBENCH® ADS8028 Reference Selector


Series Voltage Reference Selector

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