AD7485BST datasheet(2/16 Pages) AMICC

Il numero della parte	AD7485BST

Spiegazioni elettronici	1 MSPS, Serial 14-Bit SAR ADC

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Produttore elettronici	AMICC [AMIC Technology]

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REV. 0

–2–

AD7485–SPECIFICATIONS1

Parameter

Specification

Unit

Test Conditions/Comments

DYNAMIC PERFORMANCE

2, 3

fIN = 500 kHz Sine Wave

Signal to Noise + Distortion (SINAD)

4

76.5

dB min

78

dB typ

77

dB typ

Internal Reference

Total Harmonic Distortion (THD)

4

–90

dB max

–95

dB typ

–92

dB typ

Internal Reference

Peak Harmonic or Spurious Noise (SFDR)

4

–88

dB max

Intermodulation Distortion (IMD)

4

Second-Order Terms

–96

dB typ

fIN1 = 95.053 kHz, fIN2 = 105.329 kHz

Third-Order Terms

–94

dB typ

Aperture Delay

10

ns typ

Full Power Bandwidth

40

MHz typ

@ 3 dB

3.5

MHz typ

@ 0.1 dB

DC ACCURACY

Resolution

14

Bits

Integral Nonlinearity

4

±1LSB max

±0.5

LSB typ

Differential Nonlinearity

4

±0.75

LSB max

Guaranteed No Missed Codes to 14 Bits

±0.25

LSB typ

Offset Error

4

±6LSB max

0.036

%FSR max

Gain Error

4

±6LSB max

0.036

%FSR max

ANALOG INPUT

Input Voltage

0

V min

2.5

V max

DC Leakage Current

±1

µA max

Input Capacitance

5

35

pF typ

REFERENCE INPUT/OUTPUT

VREFIN Input Voltage

2.5

V

±1% for Specified Performance

VREFIN Input DC Leakage Current

±1

µA max

VREFIN Input Capacitance

5

25

pF typ

VREFIN Input Current

6

220

A typ

External Reference

VREFOUT Output Voltage

2.5

V typ

VREFOUT Error @ 25

°C

±50

mV typ

VREFOUT Error TMIN to TMAX

±100

mV max

VREFOUT Output Impedance

1

Ω typ

LOGIC INPUTS

Input High Voltage, VINH

VDRIVE –1V min

Input Low Voltage, VINL

0.4

V max

Input Current, IIN

±1

µA max

Input Capacitance, CIN

5

10

pF typ

LOGIC OUTPUTS

Output High Voltage, VOH

7

0.7

× VDRIVE

V min

Output Low Voltage, VOL

7

0.3

× VDRIVE

V max

Floating-State Leakage Current

±10

µA max

Floating-State Output Capacitance

5

10

pF max

Output Coding

Straight (Natural) Binary

CONVERSION RATE

Conversion Time

24

MCLKs

Track/Hold Acquisition Time

100

ns max

Sine Wave Input

70

ns max

Full-Scale Step Input

Throughput Rate

1

MSPS max

(VDD = 5 V

5%, AGND = DGND = 0 V, VREF = External, fSAMPLE = 1 MSPS; all specifica-

tions TMIN to TMAX and valid for VDRIVE = 2.7 V to 5.25 V, unless otherwise noted.)

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