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ADS7028 ACTIVE Small 8-channel 12-bit analog-to-digital converter (ADC) with SPI, GPIOs and CRC Small size

Product details

Resolution (Bits) 12 Number of input channels 8 Sample rate (Max) (kSPS) 1000 Interface type SPI Architecture SAR Input type Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext, Int Input range (Max) (V) 5.25 Input range (Min) (V) 0 Features Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 17 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 72 Analog voltage AVDD (Max) (V) 5.25 INL (Max) (+/-LSB) 1 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 5.25
Resolution (Bits) 12 Number of input channels 8 Sample rate (Max) (kSPS) 1000 Interface type SPI Architecture SAR Input type Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext, Int Input range (Max) (V) 5.25 Input range (Min) (V) 0 Features Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 17 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 72 Analog voltage AVDD (Max) (V) 5.25 INL (Max) (+/-LSB) 1 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 5.25
WQFN (RTJ) 20 16 mm² 4 x 4
  • 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
  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet 12-Bit, 1-MSPS, 8-Channel, SAR ADC w/ Internal Reference and Temperature Sensor datasheet (Rev. B) 28 Mar 2012
Technical article How smart AFEs offer an integrated analog solution for thermoelectric cooling control 04 Jan 2022
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs 21 May 2015
User guide ADS8028EVM-PDK User's Guide (Rev. A) 21 Jul 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

ADCPRO — Analog-to-digital converter pro (ADCPro™) evaluation software

ADCPro™ is a modular software system for evaluating analog-to-digital converters (ADCs) without the need for expensive logic analyzers and complex analysis routines. Used alone it is suitable for performing analysis on data sets captured from ADC testing; when paired with a Texas Instruments (...)

Evaluation board

ADS8028EVM-PDK — ADS8028 Performance Demonstration Kit

The ADS8028EVM-PDK is designed to evaluate the ADS8028. The ADS8028 is a 12-bit, 8-channel muxed, successive approximation register (SAR) analog-to-digital converter (ADC), with a maximum throughput rate of 1 MSPS. The ADS8028 also offers an internal 2.5V voltage reference and internal temperature (...)

Simulation model

ADS8028 IBIS Model (Rev. A)

SBAM141A.ZIP (36 KB) - IBIS Model
Simulation model

ADS8028 TINA-TI Reference Design

SBAM144.TSC (147 KB) - TINA-TI Reference Design
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and (...)
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
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QFN (RTJ) 20 View options

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