AFS090 datasheet(130/334 Pages) MICROSEMI

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Device Architecture

2- 11 4

R e v isio n 2

Standard Conversion

Intra-Conversion

Notes:

1. Refer to EQ 20 on page 2-110 for the calculation on the sample time, tSAMPLE.

2. See EQ 29 on page 2-112 for calculation on the conversion time, tCONV.

3. Minimum time to issue an ADCSTART after DATAVALID is 1 SYSCLK period

Figure 2-89 • Standard Conversion Status Signal Timing Diagram

SYSCLK

ADCSTART

BUSY

SAMPLE

DATAVALID

HDADCSTART

SUADCSTART

CK2QBUSY

CK2QSAMPLE

CK2QVAL

SAMPLE1

CONV

ADC_RESULT[11:0]

CLK2RESULT

st Sample Result

CK2QVAL

nd Sample Result

DATA2START

Note:

*tCONV represents the conversion time of the second conversion. See EQ 6 on page 2-92 for calculation of the

conversion time, tCONV.

Figure 2-90 • Intra-Conversion Timing Diagram

SYSCLK

ADCSTART

BUSY

SAMPLE

DATAVALID

CK2QSAMPLE

tCK2QVAL

CONV*

CLR2QVAL

CK2QBUSY

ADCRESET

CALIBRATE

CK2QCAL

tCK2QCAL

Interrupts Power-Up Calibration

Resumes Power-Up Calibration

AFS090 数据表(PDF) 130 Page - Microsemi Corporation

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