ADF4401ABCEZ datasheet(32/39 Pages) AD

32 / 39 page

ADF4401A

Data Sheet

Rev. 0 | Page 32 of 39

Address: 0x2F, Default: 0x92, Name: REG002F

Res erved.

[7:5] RESERVED

[2:0] ALC_REF_DAC_NOM_VCO4 (R/W)

[4] ALC_RECT_SELECT_VCO4 (R/W)

[3] ALC_REF_DAC_LO_VCO4 (R/W)

Table 33. Bit Descriptions for REG002F

Bit(s)

Bit Name

Description

Default

Access

[7:5]

RESERVED

Reserved. Set to 0x4 for normal operation.

0x4

R/W

ALC_RECT_SELECT_VCO4

Reserved.

0x1

R/W

ALC_REF_DAC_LO_VCO4

Reserved.

0x0

R/W

[2:0]

ALC_REF_DAC_NOM_VCO4

Reserved.

0x2

R/W

Address: 0x30, Default: 0x3F, Name: REG0030

Sets the Autocalibration Tim e per

Stage.

[7:0] VCO_BAND_DIV (R/W)

Table 34. Bit Descriptions for REG0030

Bit(s)

Bit Name

Description

Default

Access

[7:0]

VCO_BAND_DIV

Sets the Autocalibration Time per Stage. See the VCO Calibration Time section for

details.

0x3F

R/W

Address: 0x31, Default: 0xA7, Name: REG0031

Us ed as Part of the ALC Wait Tim e

and Synthetic Lock Tim e.

[7:0] TIMEOUT[7:0] (R/W)

Table 35. Bit Descriptions for REG0031

Bit(s)

Bit Name

Description

Default

Access

[7:0]

TIMEOUT[7:0]

Used as Part of the ALC Wait Time and Synthetic Lock Time. See the VCO Calibration Time

section for details.

0xA7

R/W

Address: 0x32, Default: 0x04, Name: REG0032

ADC Mux Select.

Us ed as Part of the ALC Wait Tim e

and Synthetic Lock Tim e.

ADC Enable.

ADC Fas t Convers ion.

Enables ADC Convers ion.

ADC Continuous Convers ion.

[7] ADC_MUX_SEL (R/W)

[1:0] TIMEOUT[9:8] (R/W)

[6] RESERVED

[2] ADC_ENABLE (R/W)

[5] ADC_FAST_CONV (R/W)

[3] ADC_CONVERSION (R/W)

[4] ADC_CTS_CONV (R/W)

Table 36. Bit Descriptions for REG0032

Bit(s)

Bit Name

Description

Default

Access

ADC_MUX_SEL

ADC Mux Select.

0x0

R/W

0: proportional to absolute temperature (PTAT) voltage muxed to ADC input.

1: scaled VTUNE voltage muxed to ADC input.

RESERVED

Reserved.

0x0

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