AD9102 datasheet(40/43 Pages) AD

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Data Sheet

AD9102

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Rev. B | 40 of 43

Table 37. Bit Descriptions for DAC_DGAIN (Continued)

Bits

Bit Name

Settings

Description

Reset

Access

[3:0]

RESERVED

0x0

DAC SAWTOOTH CONFIGURATION REGISTER (SAW_CONFIG, ADDRESS 0X37)

Table 38. Bit Descriptions for SAW_CONFIG

Bits

Bit Name

Settings

Description

Reset

Access

[15:8]

RESERVED

0x01

[7:2]

SAW_STEP

Number of samples per step for the DAC. Up to 64 samples per step.

0x01

[1:0]

SAW_TYPE

The type of sawtooth (positive, negative or triangle) for the DAC.

0x0

0x0 Ramp up saw wave.

0x1 Ramp down saw wave.

0x2 Triangle saw wave.

0x3 No wave, zero.

DDS TUNING WORD MSB REGISTER (DDS_TW32, ADDRESS 0X3E)

Table 39. Bit Descriptions for DDS_TW32

Bits

Bit Name

Settings

Description

Reset

Access

[15:0]

DDSTW_MSB

DDS tuning word MSB.

0x0000

DDS TUNING WORD LSB REGISTER (DDS_TW1, ADDRESS 0X3F)

Table 40. Bit Descriptions for DDS_TW1

Bits

Bit Name

Settings

Description

Reset

Access

[15:8]

DDSTW_LSB

DDS tuning word LSB.

0x00

[7:0]

RESERVED

0x00

DDS PHASE OFFSET REGISTER (DDS_PW, ADDRESS 0X43)

Table 41. Bit Descriptions for DDS1_PW

Bits

Bit Name

Settings

Description

Reset

Access

[15:0]

DDS_PHASE

DDS phase offset.

0x0000

0x0000 DDS phase offset = 0°

0x4000 DDS phase offset = 90°

0x8000 DDS phase offset = 180°

0xC000 DDS phase offset = 270°

PATTERN CONTROL 1 REGISTER (TRIG_TW_SEL, ADDRESS 0X44)

Table 42. Bit Descriptions for TRIG_TW_SEL

Bits

Bit Name

Settings

Description

Reset

Access

[15:2]

RESERVED

0x0000

TRIG_DELAY_EN

Enable start delay as trigger delay for DAC channel.

0 Delay repeats for all patterns.

1 Delay is only at the start of first pattern.

RESERVED

AD9102 Datasheet(PDF) 40 Page - Analog Devices

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