Rainbow-electronics MAX1448 Instrukcja Użytkownika Pobierz pdf (Strona 3)

MAX1448

10-Bit, 80Msps, Single +3.0V, Low-Power

ADC with Internal Reference

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ELECTRICAL CHARACTERISTICS (continued)

= +3.0V, OV

= +2.0V; 0.1µF and 1.0µF capacitors from REFP, REFN, and COM to GND; V

REFIN

= +2.048V, REFOUT

connected to REFIN through a 10kΩ resistor, V

= 2Vp-p (differential with respect to COM), C

≈ 15pF at digital outputs (Note 5),

CLK

= 83.3MHz (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

= 7.47MHz 61 74

= 20MHz 61 74

Spurious-Free Dynamic

Range

SFDR

= 39.9MHz (Note 1) 73

dBc

= 7.47MHz 74

= 20MHz 74

Third-Harmonic Distortion HD3

= 39.9MHz (Note 1) 73

dBc

Intermodulation Distortion

Two-Tone

IMD

= 24MHz at -6.5dB FS, f

= 26MHz at

-6.5dB FS (Note 2)

-74 dBc

Third-Order Intermodulation

Distortion

IM3

= 24MHz at -6.5dB FS, f

= 26MHz at

-6.5dB FS (Note 2)

-74 dBc

= 7.47MHz -72 -60

= 20MHz -70 -60

Total Harmonic Distortion

(first 5 harmonics)

THD

= 39.9MHz (Note 1) -69

dBc

Small-Signal Bandwidth Input at -20dB FS, differential inputs 500 MHz

Full-Power Bandwidth FPBW Input at -0.5dB FS, differential inputs 400 MHz

Aperture Delay t

1ns

Aperture Jitter t

2ps

RMS

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

Differential Gain ±1 %

Differential Phase ±0.25 degrees

Output Noise IN+ = IN- = COM 0.2 LSB

RMS

INTERNAL REFERENCE

Reference Output Voltage REFOUT

2.048

±1%

Reference Temperature

Coefficient

REF

60 ppm/°C

Load Regulation 1.25 mV/mA

EXTERNAL REFERENCE

Positive Reference REFP V

REFIN

= +2.048V 2.012 V

Negative Reference REFN V

REFIN

= +2.048V 0.988 V

Differential Reference Voltage ∆V

REF

REFP

- V

REFN

, V

REFIN

= +2.048V 0.98 1.024 1.07 V

REFIN Resistance R

REFIN

>50 MΩ

D IGIT A L IN PU T S

( C LK, P D , OE)

CLK

0.8 x

Input High Threshold V

PD, OE

0.8 x

D D

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

ADC with Internal Reference 1

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