ADS8528

ADS8548

ADS8568

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SBAS543A

– AUGUST 2011 – REVISED OCTOBER 2011

ELECTRICAL CHARACTERISTICS: ADS8528

AVDD = 5V, and DVDD = 3.3V.

ADS8528

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

SAMPLING DYNAMICS

Conversion time

Internal conversion clock

1.33

μs

Serial interface, all four SDOx active

480

kSPS

Throughput rate

Parallel interface

650

kSPS

DC ACCURACY

Resolution

12

Bits

No missing codes

12

Bits

INL

–0.75

±0.2

0.75

LSB

Differential linearity error

DNL

–0.5

±0.2

0.5

LSB

Offset error

–1.5

±0.5

1.5

mV

Offset error matching

–0.65

0.65

mV

Offset error drift

±3.5

μV/°C

Gain error

Referenced to voltage at REFIO

–0.5

±0.25

0.5

%

Between channels of any pair

–0.2

0.2

%

Gain error matching

Between any two channels

–0.4

0.4

%

Gain error drift

Referenced to voltage at REFIO

±6

ppm/

°C

AC ACCURACY

Signal-to-noise ratio

73

73.9

dB

Signal-to-noise ratio + distortion

73

73.8

dB

–89

–84

dB

Spurious-free dynamic range

84

92

dB

Channel-to-channel isolation

120

dB

In 4VREF mode

48

MHz

–3dB small-signal bandwidth

BW

In 2VREF mode

24

MHz

(1)

Integral nonlinearity is defined as the maximum deviation from a straight line passing through the end-points of the ideal ADC transfer

function expressed as the number of LSBs or percentage of the specified full-scale range.

(2)

Calculated on the first nine harmonics of the input frequency.

Copyright

© 2011, Texas Instruments Incorporated

3

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