Buffer

Internal

Reference

Internal

Temperature

Sensor

REF

DGND

AIN0

AIN1

AIN2

AIN3

AIN4

AIN5

AIN6

AIN7

Control

Logic

and

Sequencer

SCLK

DOUT

DIN

CS

PDRST

/

TM_BUSY

ADC

SH

DVDD

AVDD

ADS8028

www.ti.com

SBAS549B – MAY 2011 – REVISED MARCH 2012

12-Bit, 1-MSPS, 8-Channel, SAR ADC

with Internal Reference and Internal Temperature Sensor

Check for Samples: ADS8028

1

FEATURES

DESCRIPTION

The ADS8028 is a 12-bit analog-to-digital converter

23

•

Outstanding Performance:

(ADC), capable of operating at sampling speeds up to

–

Throughput: Up to 1 MSPS

1 MSPS. The device is based on a successive

–

No Missing Codes: 12 Bits

approximation register (SAR) core and provides an

inherent sample-and-hold (SH) front-end.

–

INL: ±0.5 LSB

–

SNR: 72 dB

In addition to having eight analog input channels, the

ADS8028 offers an internal temperature sensor with

•

Highly Integrated:

0.25°C resolution and an internal voltage reference. A

–

Eight Analog Inputs

nine-channel internal multiplexer enables multiple

–

High-Resolution Internal Temperature

channels to be selected (including the internal

Sensor

temperature sensor) that are indefinitely scanned in a

sequential manner. A simple SPI-compatible serial

–

Nine-Channel Multiplexer with Channel

interface provides easy communication and control

Sequencer

between the device and host controller. The digital

–

Low-Drift Internal Voltage Reference

supply can operate from 1.65 V to 5.25 V, enabling

•

Wide Supply Range:

direct interface with a wide range of processors and

controllers.

–

Analog Supply (AVDD): 2.7 V to 5.25 V

At full speed of 1 MSPS, the ADS8028 dissipates

–

Digital Supply (DVDD): 1.65 V to 5.25 V

only 17 mW. The device offers flexible power-down

•

Low Power:

modes to save power when conversions are not

–

17 mW at 1 MSPS

being performed. The ADS8028 performance is

–

Flexible Power-Down Modes

specified over the extended industrial temperature

range of –40°C to +125°C.

•

SPI™-Compatible Serial Interface: 20 MHz

The ADS8028 is ideal for demanding measurement

•

Small Footprint: 4-mm × 4-mm, Thin QFN-20

applications, such as sensor output monitoring,

power-supply monitoring, and printed circuit board

APPLICATIONS

(PCB) hot-spot analysis, and is available in a small

•

Programmable Logic Controls (PLCs)

form-factor QFN-20 package.

•

Industrial Process Controls (IPCs)

•

Telecommunications

•

Power-Supply Monitoring

•

PCB Hot-Spot Analysis

•

Battery-Powered Applications

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

SPI is a trademark of Motorola.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2011–2012, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.