AD7142 datasheet(36/68 Pages) AD

36 / 68 page

AD7142

Rev. 0 | Page 36 of 68

POWER-UP SEQUENCE

When the AD7142 is powered up, the following sequence is

recommended when initially developing the AD7142 and μP

serial interface:

Turn on the power supplies to the AD7142.

Write to the Bank 2 registers at Address 0x080 through

Address 0x0DF. These registers are contiguous so a

sequential register write sequence can be applied.

Note: The Bank 2 register values are unique for each

application. Register values are provided by Analog

Devices after the sensor board has been developed.

Write to the Bank 1 registers at Address 0x000 through

Address 0x007 as outlined below. These registers are

contiguous so a sequential register write sequence can be

applied (see Figure 45 and Figure 50).

Caution: At this time, Address 0x001 must remain set to

default value 0x0000 during this contiguous write

operation.

Address 0x000 = 0x00B2

Address 0x001 = 0x0000

Address 0x002 = 0x0690

Address 0x003 = 0x0664

Address 0x004 = 0x290F

Address 0x005 = 0x0000

Address 0x006 = 0x0000

Address 0x007 = 0x0001 (The AD7142 interrupt is asserted

approximately every 37 ms.)

Write to the Bank 1 register, Address 0x001 = 0x0FFF.

Read back the corresponding interrupt status register at

Address 0x008, Address 0x009, or Address 0x00A. This is

determined by the interrupt output configuration as

explained in the Interrupt Output section.

Note: The specific registers required to be readback depend

on each application. Analog Devices provides this

information after the sensor board has been developed.

Repeat Step 5 every time INT is asserted.

FIRST CONVERSION SEQUENCE

CONVERSION

STAGE

CONVERSION STAGES DISABLED

10 11

910 11

SECOND CONVERSION

SEQUENCE

THIRD CONVERSION

SEQUENCE

Figure 54. Recommended Start-Up Sequence

AD7142 датащи(PDF) 36 Page - Analog Devices

AD7142 датащи(HTML) 36 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68

датащи скачать

ссылки URL