Rainbow-electronics MAX1093 Manual de usuario descargar pdf (Pagina 18)

Total Harmonic Distortion

Total harmonic distortion (THD) is the ratio of the RMS

sum of the first five harmonics of the input signal 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 har-

monics.

Spurious-Free Dynamic Range

Spurious-free dynamic range (SFDR) is the ratio of RMS

amplitude of the fundamental (maximum signal compo-

nent) to the RMS value of the next-largest distortion

component.

THD 20 log V V V V / V

=+++

























⋅

MAX1091/MAX1093

250ksps, +3V, 8-/4-Channel, 10-Bit ADCs

with +2.5V Reference and Parallel Interface

18 ______________________________________________________________________________________

+3V

LOGIC

= +2V/+3V

GND

SUPPLIES

DGND+2V/+3VCOM

GND

4.7µF

0.1µF

DIGITAL

CIRCUITRY

MAX1091

MAX1093

R* = 5Ω

*OPTIONAL

Figure 11. Power-Supply and Grounding Connections

CLK

ACQUISITION

CONTROL BYTE

CONVERSION

LOW

BYTE

HIGH

BYTE

D7–D0 D9–D8

LOW

BYTE

HIGH

BYTE

D7–D0 D9–D8

ACQUISITION

SAMPLING INSTANT

123 456 78910111213141516

HBEN

D7–D0

STATE

CONTROL

BYTE

Figure 10. Timing Diagram for Fastest Conversion

Chip Information

TRANSISTOR COUNT: 5781

1 2 ... 13 14 15 16 17 18 19 20

MAX1091/MAX1093 1

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Rainbow-electronics MAX1093 Manual de usuario Pagina 18

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