ADS8028 12-bit, 8-channel, 1MSPS, SAR ADC with Internal Reference and Internal Temperature Sensor | TI.com

ADS8028 (ACTIVE) 12-bit, 8-channel, 1MSPS, SAR ADC with Internal Reference and Internal Temperature Sensor

 

Description

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.

Features

  • 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

WEBENCH® Designer ADS8028



Parametrics

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Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of input channels Interface Operating temperature range (C) Package Group Approx. price (US$) Power consumption (Typ) (mW) Package size: mm2:W x L (PKG) Architecture Input type Multi-channel configuration Reference mode Features Input range (Max) (V) Input range (Min) (V) Analog voltage AVDD (Min) (V) Analog voltage AVDD (Max) (V) Digital supply (Min) (V) Digital supply (Max) (V) INL (Max) (+/-LSB) SNR (dB) THD (Typ) (dB) Rating
ADS8028 Order now 12     1000     8     SPI     -40 to 125     QFN | 20     3.25 | 1ku     17     20QFN: 16 mm2: 4 x 4 (QFN | 20)     SAR     Single-Ended     Multiplexed     Ext
Int    
    5.25     0     2.7     5.25     1.65     5.25     1     72     -82     Catalog    
ADC128D818 Order now 12     0.082     8     I2C     -40 to 125     TSSOP | 16     1.95 | 1ku     2     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     Delta-Sigma     Pseudo-Differential
Single-Ended    
Multiplexed     Ext
Int    
Oscillator
Temp Sensor    
5.5     0     3     5.5     3     5.5     1         Catalog    
ADS7142 Order now 12     140     2     I2C     -40 to 125     X2QFN | 10     0.85 | 1ku     0.0009     10X2QFN: 3 mm2: 2 x 1.5 (X2QFN | 10)     SAR     Pseudo-Differential
Single-Ended    
Multiplexed     Supply     Comparator
Oscillator
Small Size    
3.6     0     1.65     3.6     1.65     3.6     1     71.5     -80     Catalog    
ADS7828 Order now 12     50     8     I2C     -40 to 85     TSSOP | 16     3.58 | 1ku     0.675