ADS8028 - 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