AD9148BBCZ datasheet(35/73 Pages) AD

35 / 73 page

Preliminary Technical Data

AD9148

Rev. PrA | Page 35 of 73

Addr

(Hex)

Bit

Name

Function

Default

QDAC FSC Adj

7:0

QDAC FSC Adj[7:0]

Q DAC full-scale current adjustment (LSB part). QDAC FS

Adj[9:0] sets the full-scale current of the QDAC. The full-scale

current can be adjusted from 8.64 mA to 31.6 mA in step sizes

of approximately 22.5 μA.

0x000 = 8.64 mA

...

0x200 = 20.14mA

…

0x3FF = 31.66 mA

Set DAC SPI select = 0 to configure DAC 2 path.

Set DAC SPI select = 1 to configure DAC 4 path.

QDAC Control

QDAC sleep

Q DAC sleep mode (fast wake-up mode).

1:0

QDAC FSC Adj[9:8]

QDAC full-scale current adjustment (MSB part).

Set DAC SPI select = 0 to configure DAC 2 path.

Set DAC SPI select = 1 to configure DAC 4 path.

Aux QDAC Data

7:0

AUX QDAC

Data[7:0]

Auxiliary QDAC data (LSB part). AUX QDAC Data[9:0] sets

the magnitude of the AUX DAC current. The range is 0 mA

to 2 mA and the step size is 2 μA.

0x000 = 0.000 mA.

0x001 = 0x002 mA.

…

0x3FF = 2.046 mA.

Set DAC SPI select = 0 to configure DAC 2 path.

Set DAC SPI select = 1 to configure DAC 4 path.

Aux QDAC Control

AUX QDAC sign

Auxiliary QDAC output sign.

0 = positive, current is directed to the AUXx_P pin.

1 = negative, current is directed to the AUXx_N pin.

AUX QDAC

current direction

Auxiliary QDAC current direction.

0 = source.

1 = sink.

AUX QDAC

power down

Auxiliary QDAC power down.

1:0

AUX QDAC

Data[9:8]

Auxiliary QDAC data (MSB part).

Set DAC SPI select = 0 to configure DAC 2 path.

Set DAC SPI select = 1 to configure DAC 4 path.

AD9148BBCZ Datasheet(PDF) 35 Page - Analog Devices

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