AD7484_15 datasheet(3/20 Pages) AD

Il numero della parte	AD7484

Spiegazioni elettronici	3 MSPS, 14-Bit SAR ADC

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Produttore elettronici	AD [Analog Devices]

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AD7484

Rev. C | Page 3 of 20

SPECIFICATIONS

AVDD/DVDD = 5 V ± 5%, AGND = DGND = 0 V, VREF = external, fSAMPLE = 3 MSPS; all specifications TMIN to TMAX and valid for VDRIVE = 2.7 V

to 5.25 V, unless otherwise noted. Operating temperature range is −40°C to +85°C.

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

DYNAMIC PERFORMANCE1, 2

Signal-to-Noise + Distortion (SINAD)3

76.5

dB

fIN = 1 MHz

78

dB

fIN = 1 MHz

79

dB

fIN = 1 MHz, extended input

77

dB

fIN = 1 MHz, internal reference

Total Harmonic Distortion (THD)3

−90

dB

−95

dB

−92

dB

Internal reference

Peak Harmonic or Spurious Noise

(SFDR)3

−90

dB

Intermodulation Distortion (IMD)3

Second Order Terms

−96

dB

fIN1 = 95.053 kHz, fIN2 = 105.329 kHz

Third Order Terms

−94

dB

Aperture Delay

10

ns

Full Power Bandwidth

40

MHz

@ 3 dB

3.5

MHz

@ 0.1 dB

DC ACCURACY

Resolution

14

Bits

Integral Nonlinearity3

±0.5

±1

LSB

Differential Nonlinearity3

±0.3

±0.75

LSB

Guaranteed no missed codes to 14 bits

Offset Error3

±6

LSB

0.036

%FSR

Gain Error3

±6

LSB

0.036

%FSR

ANALOG INPUT

Input Voltage

−200

mV

+2.7

V

DC Leakage Current

±1

µA

VIN from 0 V to 2.7 V

±2

µA

VIN = −200 mV

Input Capacitance4

35

pF

REFERENCE INPUT/OUTPUT

Input Voltage, VREFIN

+2.5

V

± 1% for specified performance

Input DC Leakage Current, VREFIN

±1

µA

Input Capacitance, VREFIN4

25

pF

Input Current, VREFIN

220

µA

External reference

Output Voltage, VREFOUT

+2.5

V

Error @ 25°C, VREFOUT

±50

mV

Error TMIN to TMAX, VREFOUT

±100

mV

Output Impedance, VREFOUT

1

Ω

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