AD7280 datasheet(30/33 Pages) AD

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AD7280

Preliminary Technical Data

Rev. PrD | Page 30 of 33

Convert and Read all parts, all voltages

•

Bits D15 and D13 of the CONTROL register should

be set to 1, bits D14 and D12 should be set to 0 on all

parts.

•

Initiate conversion through either the falling edge of

CNVST or the rising edge of CS.

•

Following the completion of the conversion either

bring CS low and apply 24 SCLKs for each conversion

result to be read back or apply an individual CS

pulse, each framing 24 SCLKs, for each conversion

result to be read back.

Convert and Read one part, all voltages and all

temperatures

•

Bits D13-D12 of the CONTROL register should be set

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

on all parts.

•

Bits D15-D12 of the CONTROL register of the part

to be read from should be set to 0.

•

Initiate conversion through either the falling edge of

CNVST or the rising edge of CS.

•

Following the completion of the conversion either

bring CS low and apply 24 SCLKs for each conversion

result to be read back or apply an individual CS

pulse, each framing 24 SCLKs, for each conversion

result to be read back.

Convert and Read one part, all voltages and

temperatures 1, 3 & 5

•

Bits D13-D12 of the CONTROL register should be set

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

on all parts.

•

Bit D15 and D13 of the CONTROL register of the

part to be read from should be set to 0 and bits D14

and D12 should be set to 1.

•

Initiate conversion through either the falling edge of

CNVST or the rising edge of CS.

•

Following the completion of the conversion either

bring CS low and apply 24 SCLKs for each conversion

result to be read back or apply an individual CS

pulse, each framing 24 SCLKs, for each conversion

result to be read back.

Convert and Read one part, all voltages, no

temperatures

•

Bits D13-D12 of the CONTROL register should be set

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

on all parts.

•

Bit D14 and D12 of the CONTROL register of the

part to be read from should be set to 0 and bits D15

and D13 should be set to 1.

•

Initiate conversion through either the falling edge of

CNVST or the rising edge of CS.

•

Following the completion of the conversion either

bring CS low and apply 24 SCLKs for each conversion

result to be read back or apply an individual CS

pulse, each framing 24 SCLKs, for each conversion

result to be read back.

Convert and Read a single voltage or temperature result

•

The register address corresponding to the voltage or

temperature result to be read should be written to the

Read register of the part that is to be read, see Table 9

for register addresses.

•

Bits D13-D12 of the CONTROL register should be set

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

on all parts.

•

Bits D13 and D12 of the CONTROL register of the

part to be read from should be set such that a

conversion will be completed on the required channel.

Note: With the exception of a Self-Test conversion it is

not possible to convert on a single channel, 6, 9 or 12

conversions must be completed.

•

Initiate conversion through either the falling edge of

CNVST or the rising edge of CS.

•

Following the completion of the conversion bring CS

low and apply 24 SCLKs to be read back the desired

voltage or temperature.

Read a single register

•

The register address corresponding to the voltage or

temperature result to be read should be written to the

Read register of the part that is to be read, see Table 9

for register addresses.

•

Bits D13-D12 of the CONTROL register should be set

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

on all parts.

AD7280 Datasheet(PDF) 30 Page - Analog Devices

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