AD7682 datasheet(4/28 Pages) AD

4 / 28 page

AD7949

Rev. A | Page 4 of 28

Parameter

Conditions/Comments

Min

Typ

Max

Unit

AC ACCURACY5

Dynamic Range

85.6

dB6

Signal-to-Noise

fIN = 20 kHz, VREF = 5 V

84.5

85.5

fIN = 20 kHz, VREF = 4.096 V internal REF

fIN = 20 kHz, VREF = 2.5 V internal REF

SINAD

fIN = 20 kHz, VREF = 5 V

fIN = 20 kHz, VREF = 5 V, −60 dB input

33.5

fIN = 20 kHz, VREF = 4.096 V internal REF

fIN = 20 kHz, VREF = 2.5 V internal REF

Total Harmonic Distortion

fIN = 20 kHz

−100

Spurious-Free Dynamic Range

fIN = 20 kHz

108

Channel-to-Channel Crosstalk

fIN = 100 kHz on adjacent channel(s)

−125

SAMPLING DYNAMICS

−3 dB Input Bandwidth

Selectable

0.425

1.7

MHz

Aperture Delay

VDD = 5 V

2.5

INTERNAL REFERENCE

REF Output Voltage

2.5 V, @ 25°C

2.490

2.500

2.510

4.096 V, @ 25°C

4.086

4.096

4.106

REFIN Output Voltage7

2.5 V, @ 25°C

1.2

4.096 V, @ 25°C

2.3

REF Output Current

±300

μA

Temperature Drift

±10

ppm/°C

Line Regulation

VDD = 5 V ± 5%

±15

ppm/V

Long-Term Drift

1000 hours

ppm

Turn-On Settling Time

CREF = 10 μF

EXTERNAL REFERENCE

Voltage Range

REF input

0.5

VDD + 0.3

REFIN input (buffered)

0.5

VDD − 0.2

Current Drain

250 kSPS, REF = 5 V

μA

TEMPERATURE SENSOR

Output Voltage8

@ 25°C

283

Temperature Sensitivity

mV/°C

DIGITAL INPUTS

Logic Levels

VIL

−0.3

+0.3 × VIO

VIH

0.7 × VIO

VIO + 0.3

IIL

−1

μA

IIH

−1

μA

DIGITAL OUTPUTS

Data Format9

Pipeline Delay10

VOL

ISINK = +500 μA

0.4

VOH

ISOURCE = −500 μA

VIO − 0.3

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