Rainbow-electronics MAX1207 Manual de usuario descargar pdf (Pagina 28)

MAX1207

65Msps, 12-Bit ADC

28 ______________________________________________________________________________________

Intermodulation Distortion (IMD)

IMD is the ratio of the RMS sum of the intermodulation

products to the RMS sum of the two fundamental input

tones. This is expressed as:

The fundamental input tone amplitudes (V

and V

)

are at -7dBFS. Fourteen intermodulation products

IMP_

) are used in the MAX1207 calculation. The

intermodulation products are the amplitudes of the

output spectrum at the following frequencies:

• 2nd-order intermodulation products: f1 + f2, f2 - f1

• 3rd-order intermodulation products: 2 x f1 - f2, 2 x f2

- f1, 2 x f1 + f2, 2 x f2 + f1

• 4th-order intermodulation products: 3 x f1 - f2, 3 x f2

- f1, 3 x f1 + f2, 3 x f2 + f1

• 5th-order intermodulation products: 3 x f1 - 2 x f2, 3

x f2 - 2 x f1, 3 x f1 + 2 x f2, 3 x f2 + 2 x f1

3rd-Order Intermodulation (IM3)

IM3 is the total power of the 3rd-order intermodulation

products to the Nyquist frequency relative to the total

input power of the two input tones f1 and f2. The indi-

vidual input tone levels are at -7dBFS. The 3rd-order

intermodulation products are 2 x f1 - f2, 2 x f2 - f1, 2 x

f1 + f2, 2 x f2 + f1.

Chip Information

TRANSISTOR COUNT: 18,700

PROCESS: CMOS

IMD x

VV V

IMP IMP IMPn













••• •

log

EXPOSED PADDLE (GND)

COM

GND

INP

INN

GND

DCE

CLKN

CLKP

REFN

REFP

GND

D11

D10

CLKTYP

REFIN

REFOUT

GND

DAV

I.C.

G/T

THIN QFN

6mm × 6mm × 0.8mm

MAX1207

DOR

TOP VIEW

Pin Configuration

1 2 ... 23 24 25 26 27 28 29

65Msps, 12-Bit ADC 1

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Rainbow-electronics MAX1207 Manual de usuario Pagina 28

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