Rainbow-electronics MAX1444 Uživatelský manuál stáhnout pdf (Strana 3)

MAX1444

10-Bit, 40Msps, +3.0V, Low-Power

ADC with Internal Reference

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= +3.0V, OV

= +2.7V; 0.1µF and 1.0µF capacitors from REFP, REFN, and COM to GND; V

REFIN

= +2.048V, REFOUT con-

nected to REFIN through a 10kΩ resistor, V

= 2Vp-p (differential w.r.t. COM), C

= 10pF at digital outputs, f

CLK

= 40MHz (50% duty

cycle), T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

= 7.51MHz -75

= 19.91MHz -74

Third-Harmonic Distortion HD3

= 39.9MHz (Note 1)

-72.5

dBc

Two-Tone Intermodulation

Distortion

IMD

= 11.5MHz at -6.5dBFS

= 13.5MHz at -6.5dBFS

(Note 2)

-76

dBc

Third-Order Intermodulation

Distortion

IM3

= 11.5MHz at -6.5dBFS

= 13.5MHz at -6.5dBFS

(Note 2)

-76

dBc

= 7.51MHz

-73.8

-65

= 19.91MHz

-72.2

-65

Total Harmonic Distortion

(First 5 Harmonics)

THD

= 39.9MHz (Note 1) -70

dBc

Small-Signal Bandwidth Input at -20dBFS, differential inputs

500

MHz

Full-Power Bandwidth FPBW Input at -0.5dBFS, differential inputs

400

MHz

Aperture Delay t

1ns

Aperture Jitter t

RMS

Overdrive Recovery Time For 1.5 × full-scale input 2 ns

Differential Gain ±1%

Differential Phase

±0.25

degree

Output Noise IN+ = IN- = COM 0.2

LS B

RM S

INTERNAL REFERENCE

Reference Output Voltage

REFOUT

2.048 ±1% V

Reference Temperature

Coefficient

REF

p p m/°C

Load Regulation

1.25

mV/mA

EXTERNAL REFERENCE

Positive Reference REFP V

REFIN

= +2.048V

2.012

Negative Reference REFN V

REFIN

= +2.048V

0.988

Differential Reference Voltage

∆V

REF

REFP

– V

REFN

, V

REFIN

= +2.048V

0.98 1.024 1.07

REFIN Resistance

REFIN

>50

MΩ

DIGITAL INPUTS (CLK, PD, OE)

CLK

0.8 ×

Input High Threshold V

PD, OE

0.8 ×

CLK

0.2 ×

Input Low Threshold V

PD, OE

0.2 ×

1 2 3 4 5 6 7 8 ... 17 18

ADC with Internal Reference 1

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