Rainbow-electronics MAX1448 Manual de usuario descargar pdf (Pagina 16)

MAX1448

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

ADC with Internal Reference

16 ______________________________________________________________________________________

Total Harmonic Distortion (THD)

THD is typically the ratio of the RMS sum of the input

signal’s first five harmonics to the fundamental itself.

This is expressed as:

where V

is the fundamental amplitude, and V

through

are the amplitudes of the 2nd- through 5th-order

harmonics.

Spurious-Free Dynamic Range (SFDR)

SFDR is the ratio expressed in decibels of the RMS

amplitude of the fundamental (maximum signal compo-

nent) to the RMS value of the next largest spurious

component, excluding DC offset.

Intermodulation Distortion (IMD)

The two-tone IMD is the ratio expressed in decibels of

either input tone to the worst 3rd-order (or higher) inter-

modulation products. The individual input tone levels

are at -6.5dB full scale, and their envelope is at -0.5dB

full scale.

___________________Chip Information

TRANSISTOR COUNT: 5684

PROCESS: CMOS

HOLD

ANALOG

INPUT

SAMPLED

DATA (T/H)

T/H

TRACK TRACK

CLK

Figure 10. Track-and-Hold Aperture Timing

THD VVVV V=× +++

()

20 1

log ( ) /

MAX1448

TQFP

TOP VIEW

32 28

293031

REFIN

GND

REFOUT

REFP

1611 12

GND

CLK

GND

OGND

24 D4

T.P.

8GND

IN-

IN+

GND

COM

1REFN

Pin Configuration

1 2 ... 11 12 13 14 15 16 17 18

ADC with Internal Reference 1

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Rainbow-electronics MAX1448 Manual de usuario Pagina 16

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