DAC3482 datasheet(29/79 Pages) TI1

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EXTIO

BIAS

coarse _ dac

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DAC3482

www.ti.com

SLAS748A

– MARCH 2011 – REVISED JUNE 2011

– Address: 0x02, Default: 0x7000

Default

Address

Bit

Name

Function

Name

Value

config2

0x02

16bit_in

When set, the input interface is set to word-wide mode.

When cleared, the input interface is set to byte-wide mode.

dacclkgone_ena

When set, the DACCLK-gone signal from the clock monitor circuit can

be used to shut off the DAC outputs. The corresponding alarms,

alarm_dacclk_gone and alarm_output_gone, must not be masked

(i.e.Config7, bit

<10> and bit <8> must set to "0").

dataclkgone_ena

When set, the DATACLK-gone signal from the clock monitor circuit

can be used to shut off the DAC outputs. The corresponding alarms,

alarm_dataclk_gone and alarm_output_gone, must not be masked

(i.e.Config7, bit

<9> and bit <8> must set to "0").

collisiongone_ena

When set, the FIFO collision alarms can be used to shut off the DAC

outputs. The corresponding alarms, alarm_fifo_collision and

alarm_output_gone, must not be masked (i.e.Config7, bit

<13> and

bit

<8> must set to "0").

Reserved

Reserved for factory use.

Reserved

Reserved for factory use.

Reserved

Reserved for factory use.

Reserved

Reserved for factory use.

sif4_ena

When set, the serial interface (SIF) is a 4 bit interface, otherwise it is

a 3 bit interface.

mixer_ena

When set, the mixer block is enabled.

mixer_gain

When set, a 6dB gain is added to the mixer output.

nco_ena

When set, the NCO is enabled. This is not required for coarse mixing.

revbus

When set, the input bits for the data bus are reversed. MSB becomes

LSB.

Reserved

Reserved for factory use.

twos

When set, the input data format is expected to be 2

’s complement.

When cleared, the input is expected to be offset-binary.

Reserved

Reserved for factory use.

– Address: 0x03, Default: 0xF000

Default

Address

Bit

Name

Function

Name

Value

config3

0x03

15:12

coarse_dac(3:0)

Scales the output current in 16 equal steps.

1111

11:8

Reserved

Reserved for factory use.

0000

7:1

Reserved

Reserved for factory use.

0000000

sif_txenable

When set, the internal value of TXENABLE is set to

“1”.

To enable analog output data transmission, set sif_txenable to

“1” or

pull CMOS TXENABLE pin (A32) to high. To disable analog output,

set sif_txenable to

“0” and pull CMOS TXENABLE pin (A32) to low.

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