ADRF6821 datasheet(42/61 Pages) AD

42 / 61 page

ADRF6821

Data Sheet

Rev. A | Page 42 of 61

Address: 0x0032, Reset: 0x00, Name: DEMOD_ENABLES

MIX 1.8V Referenc e Enable (1:off 0:on),

Active Lo w

Q Channe l Mix e r Bias Curre nt Enab le

(0 :o ff 1:o n)

I Channe l Mix e r Enab le (0 :o ff 1:o n)

I Channe l Mix e r Bias Curre nt Enab le

(0 :o ff 1:o n)

Q Channe l Mix e r Enab le (0 :o ff 1:o n)

Mix e r Bias Curre nt Enab le (0 :o ff 1:o n)

[ 7 :6 ] RES ERV ED

[ 0 ] EN B_M IX _1 P 8 _GEN ( R/W )

[ 5 ] EN _IM X BIAS _Q ( R/W )

[ 1 ] EN _M IX _I ( R/W )

[ 4 ] EN _IM X BIAS _I ( R/W )

[ 2 ] EN _M IX _Q ( R/W )

[ 3 ] EN _M IX IBIAS GEN ( R/W )

Table 31. Bit Descriptions for DEMOD_ENABLES

Bits

Bit Name

Settings

Description

Reset

Access

[7:6]

RESERVED

Reserved.

0x0

EN_IMXBIAS_Q

Q Channel Mixer Bias Current Enable (0: off and 1: on). Mixer bias current

enable. This must be enabled whenever the mixer is enabled. The master

mixer bias, EN_MIXBIASGEN, must also be enabled as well.

0x0

R/W

EN_IMXBIAS_I

I Channel Mixer Bias Current Enable (0: off and 1: on). Mixer bias current

enable. This must be enabled whenever the mixer is enabled. The master

mixer bias, EN_MIXBIASGEN, must also be enabled as well.

0x0

R/W

EN_MIXIBIASGEN

Mixer Bias Current Enable (0: off and 1: on). Master mixer bias current is

enabled and must be enabled whenever the mixer is enabled.

0x0

R/W

EN_MIX_Q

Q Channel Mixer Enable (0: off and 1: on). Enable for the mixer. For the mixer

to correctly function, the following bits must also be enabled or set to 45:

EN_MIXBIAS_x, EN_MIXBIASGEN, EN_ICMOBIAS_x, and CODE_MIXER_OCM.

0x0

R/W

EN_MIX_I

I Channel Mixer Enable (0: off and 1: on). Enable for the mixer. For the mixer to

correctly function the following bits must also be enabled or set to 45:

EN_MIXBIAS_x, EN_MIXBIASGEN, EN_ICMOBIAS_x, and CODE_MIXER_OCM.

0x0

R/W

ENB_MIX_1P8_GEN

Mixer 1.8 V Reference Enable (0: off and 1: on). Active low.

0x0

R/W

Address: 0x0033, Reset: 0x00, Name: DEMOD_LO_COM_CTRL

Mix er LO Com m on- Mode Contr ol

[ 7 : 0 ] CO D E_M IX ER_D RV R ( R/W )

Table 32. Bit Descriptions for DEMOD_LO_COM_CTRL

Bits

Bit Name

Settings

Description

Reset

Access

[7:0]

CODE_MIXER_DRVR

Mixer LO Common-Mode Control. Determines the dc level applied to the

mixer LO driver LDO.

0x0

R/W

Address: 0x0034, Reset: 0x00, Name: DEMOD_OUT_COM_CTRL

Mix er Output Stage Com m on- Mode

Contr ol

[ 7 : 0 ] CO D E_M IX ER_O CM ( R/W )

Table 33. Bit Descriptions for DEMOD_OUT_COM_CTRL

Bits

Bit Name

Settings

Description

Reset

Access

[7:0]

CODE_MIXER_OCM

Mixer Output Stage Common-Mode Control. Determines the dc level applied

to the mixer output LDO.

0x0

R/W

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