AD7280 datasheet(31/33 Pages) AD

31 / 33 page

Preliminary Technical Data

AD7280

Rev. PrD | Page 31 of 33

•

Bits D13 and D12 of the CONTROL register of the

part to be read from should be set to 0.

•

Bring CS low and apply 24 SCLKs to be read back the

desired register.

Self-Test conversion, all parts

•

The register address corresponding to the self-test

conversion, should be written to the Read register of

all parts, see Table 9 for register addresses.

•

Bits D15-D14 of the CONTROL register should be set

to 1 on all parts to select the self-test conversion.

•

Bits D13-D12 of the CONTROL register should be set

to 1 on all parts. This switches off the read operation

on all parts.

•

Initiate conversion through either the falling edge of

CNVST or the rising edge of CS.

•

To read back the self-test conversion result from each

individual part bits D13-D12 should be set to 0 for

that part and the register data read back as outlined in

Read a single register section. The self-test conversion

results must be read back individually from each part.

Self-Test conversion, single part

•

Bits D13-D12 of the CONTROL register should be set

to 1 on all parts. This switches off the read operation

on all parts.

•

BitD8 in the CONTROL register of all parts should be

set to 1 to put each part into a software power down.

This prevents the ALERT function on the parts not

undergoing a self-test conversion from being

triggered.

•

Bit D8 in the CONTROL register of the part for which

a self-test conversion is requested should be set to 0.

This bring this part out of powerdown.

•

The register address corresponding to the self-test

conversion, should be written to the Read register of

the part under test, see Table 9 for register addresses.

•

Bits D15-D14 of the CONTROL register should be set

to 1 on the part under test to select the self-test

conversion.

•

Bits D13-D12 of the CONTROL register should be set

to 0 the part under test.

•

Initiate conversion through either the falling edge of

CNVST or the rising edge of CS.

•

the register data should be read back as outlined in

Read a single register section.

AD7280 Datasheet(PDF) 31 Page - Analog Devices

AD7280 Datasheet(HTML) 31 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

Datasheet Download

Link URL