ADS8028IRTJT datasheet(8/34 Pages) TI

Part #	ADS8028IRTJT

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

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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−140

−120

−100

−80

−60

−40

−20

0

50

100

150

200

250

300

350

400

450

500

Input Frequency (kHz)

fSAMPLE = 1.176 MHz

fIN = 41.68 kHz

fSCLK = 20 MHz

SNR = 72.7 dB

THD = −93.6 dB

G000

−0.6

−0.4

−0.2

0

0.2

0.4

0.6

1

1.5

2

2.5

3

3.5

4

4.5

5

Maximum INL

Minimum INL

Reference Voltage (V)

AVDD = 5 V

DVDD = 5 V

External Reference Mode

G001

−1

−0.8

−0.6

−0.4

−0.2

0

0.2

0.4

0.6

0.8

1

0

512

1024

1536

2048

2560

3072

3584

4096

ADC Output Code (LSB)

G002

−0.6

−0.4

−0.2

0

0.2

0.4

0.6

1

1.5

2

2.5

3

3.5

4

4.5

5

Maximum DNL

Minimum DNL

Reference Voltage (V)

AVDD = 5 V

DVDD = 5 V

External Reference Mode

G003

−1

−0.8

−0.6

−0.4

−0.2

0

0.2

0.4

0.6

0.8

1

0

512

1024

1536

2048

2560

3072

3584

4096

ADC Output Code (LSB)

G004

8

9

10

11

12

1

2

3

4

5

Reference Voltage (V)

AVDD = 5 V

DVDD = 5 V

External Reference Mode

G006

ADS8028

SBAS549B – MAY 2011 – REVISED MARCH 2012

www.ti.com

TYPICAL CHARACTERISTICS

All plots at TA = +25°C, AVDD = 3.0 V, DVDD = 3.0 V,

fSAMPLE = 1 MHz, fSCLK = 20 MHz, and VREF = 2.5 V internal, unless otherwise noted.

TYPICAL FFT

INL vs VREF

Figure 2.

Figure 3.

TYPICAL ADC INL

DNL vs VREF

Figure 4.

Figure 5.

TYPICAL ADC DNL

ENOB vs VREF

Figure 6.

Figure 7.

8

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