AD7949(RevA) View Datasheet(PDF) - Analog Devices

Part Name

Description

View to exact match

AD7949
(Rev.:RevA)

14-Bit, 8-Channel, 250 kSPS PulSAR ADC

Analog Devices 

AD7949

Parameter

AC ACCURACY5

Dynamic Range

Signal-to-Noise

SINAD

Total Harmonic Distortion

Spurious-Free Dynamic Range

Channel-to-Channel Crosstalk

SAMPLING DYNAMICS

−3 dB Input Bandwidth

Aperture Delay

INTERNAL REFERENCE

REF Output Voltage

REFIN Output Voltage7

REF Output Current

Temperature Drift

Line Regulation

Long-Term Drift

Turn-On Settling Time

EXTERNAL REFERENCE

Voltage Range

Current Drain

TEMPERATURE SENSOR

Output Voltage8

Temperature Sensitivity

DIGITAL INPUTS

Logic Levels

VIL

VIH

IIL

IIH

DIGITAL OUTPUTS

Data Format9

Pipeline Delay10

VOL

VOH

Conditions/Comments

fIN = 20 kHz, VREF = 5 V

fIN = 20 kHz, VREF = 4.096 V internal REF

fIN = 20 kHz, VREF = 2.5 V internal REF

fIN = 20 kHz, VREF = 5 V

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

fIN = 20 kHz, VREF = 4.096 V internal REF

fIN = 20 kHz, VREF = 2.5 V internal REF

fIN = 20 kHz

fIN = 20 kHz

fIN = 100 kHz on adjacent channel(s)

Selectable

VDD = 5 V

2.5 V, @ 25°C

4.096 V, @ 25°C

2.5 V, @ 25°C

4.096 V, @ 25°C

VDD = 5 V ± 5%

1000 hours

CREF = 10 μF

REF input

REFIN input (buffered)

250 kSPS, REF = 5 V

@ 25°C

ISINK = +500 μA

ISOURCE = −500 μA

Min

84.5

84

0.425

2.490

4.086

0.5

0.5

Typ

85.6

85.5

85

84

85

33.5

85

84

−100

108

−125

1.7

2.5

2.500

4.096

1.2

2.3

±300

±10

±15

50

5

50

283

1

Max

Unit

dB6

dB

dB

dB

dB

dB

dB

dB

dB

dB

dB

MHz

ns

2.510

4.106

V

V

V

V

μA

ppm/°C

ppm/V

ppm

ms

VDD + 0.3 V

VDD − 0.2 V

μA

mV

mV/°C

−0.3

0.7 × VIO

−1

−1

+0.3 × VIO V

VIO + 0.3 V

+1

μA

+1

μA

VIO − 0.3

0.4

V

V

Rev. A | Page 4 of 28

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