Rainbow-electronics MAX1231 Manual de usuario descargar pdf (Pagina 21)

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 V1 is the fundamental amplitude, and V2–V5 are

the amplitudes of the first five harmonics.

Spurious-Free Dynamic Range

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

RMS amplitude of the fundamental (maximum signal

component) to the RMS value of the next-largest distor-

tion component.

THD 20 x log V V V V / V

= +++

()













MAX1227/MAX1229/MAX1231

12-Bit 300ksps ADCs with FIFO,

Temp Sensor, Internal Reference

______________________________________________________________________________________ 21

Ordering Information (continued)

PART TEMP RANGE PIN-PACKAGE

MAX1227BCEE-T 0°C to +70°C 16 QSOP

MAX1227BEEE-T -40°C to +85°C 16 QSOP

MAX1229ACEP-T* 0°C to +70°C 20 QSOP

MAX1229AEEP-T* -40°C to +85°C 20 QSOP

MAX1229BCEP-T 0°C to +70°C 20 QSOP

MAX1229BEEP-T -40°C to +85°C 20 QSOP

MAX1231ACEG-T* 0°C to +70°C 24 QSOP

MAX1231AEEG-T* -40°C to +85°C 24 QSOP

MAX1231BCEG-T 0°C to +70°C 24 QSOP

MAX1231BEEG-T -40°C to +85°C 24 QSOP

MAX1231BCGI-T* 0°C to +70°C 28 QFN-EP**

MAX1231BEGI-T* -40°C to +85°C 28 QFN-EP**

EOC

DOUT

DIN

CSAIN3

AIN2

AIN1

AIN0

TOP VIEW

SCLK

GND

REF+AIN7

AIN6

AIN5

AIN4

CNVST/AIN15

REF-/AIN14

AIN13

AIN12AIN11

AIN10

AIN9

AIN8

QSOP

MAX1231

AIN9 AIN2

AIN1

AIN0

N.C.

EOC

DOUT

DIN

AIN10

AIN11

AIN12

AIN13

REF-/AIN14

CNVST/AIN15

REF+

GND

N.C.

SCLK

AIN8

AIN7

AIN6

AIN5

AIN4

AIN3

N.C.

MAX1231

QFN

Pin Configurations (continued)

*Future product—contact factory for availability.

**EP = Exposed paddle (connect to GND).

Chip Information

TRANSISTOR COUNT: 30,889

PROCESS: BiCMOS

1 2 ... 16 17 18 19 20 21 22 23 24

MAX1227/MAX1229/MAX1231 1

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Rainbow-electronics MAX1231 Manual de usuario Pagina 21

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