HMC832LP6GETR datasheet(45/49 Pages) AD

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HMC832

Data Sheet

VCO OUTPUT DIVIDER REGISTER

This is a write only register. Note that to write 0_1111_1110 into

VCO_REG 0x02 VCO subsystem (VCO_ID = 000b), and set

the VCO output divider to divide by 62, the following needs to

be written to Register 0x05 = 0_1111_1110, 0010, 000 b.

output RF gain.

Table 33. VCO_REG 0x02 VCO Output Divider

Bit

Type

Name

Width

Default

Description

5:0

RF divide ratio

0: mutes the output when VCO_REG 0x03[8:7] = 0d

1: fo

2: fo/2

3: invalid, defaults to 2

4: fo/4

5: invalid, defaults to 4

6: fo/6

…

60: fo/60

61: invalid, defaults to 60

62: fo/62 > 62 invalid, defaults to 62

8:6

Reserved

VCO CONFIGURATION REGISTER

The VCO configuration register is a write only register.

Table 34. VCO_REG 0x03 Configuration

Bit

Type

Name

Width

Default

Description

1:0

Programmable

performance mode

Selects output noise floor performance level at a cost of increased

current consumption.

01: low current consumption mode.

11: high performance mode.

Other states (00 and 10) not supported.

RF_N output enable

Enables the output on RF_N pin. Required for differential operation, or

single-ended output on the RF_N pin.

RF_P output enable

Enables the output on RF_P pin. Required for differential operation, or

single-ended output on the RF_P pin.

Reserved

Reserved.

Return loss

0: return loss = −5 dB typical (highest output power).

1: return loss = −10 dB typical.

Reserved

Reserved.

8:7

Mute mode

Defines when the mute function is enabled (the output is muted), see

the VCO Output Mute Function section, and Figure 35 for more

information.

00: enables mute when the divide ratio, VCO_REG 0x02[5:0] = 0. This

enables the HMC832 to be backwards compatible to the HMC830 mute

function.

01: during VCO calibration (see the VCO Calibration section for more

details).

10: not supported.

11: mute all RF outputs (unconditional).

Rev. A | Page 44 of 48

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