SNAS740B October 2017 – January 2019 LMX2572
PRODUCTION DATA.
To go below the VCO lower bound of 3.2 GHz, the channel divider can be used. The channel divider consists of several segments, and the total division value is equal to the multiplication of them. Therefore, not all values are valid.
The channel divider is automatically powered up whenever the MUXs have selected divided down output or SYSREF output, regardless of whether the RF output buffers are turned on or not. When an output is not used, TI recommends selecting the VCO output (OUTx_MUX = 1) to ensure that the channel divider is not unnecessarily powered up.
OUTA_MUX | OUTB_MUX | CHANNEL DIVIDER |
---|---|---|
0: Channel divider output | Don't care | Powered up |
Don't care | 0: Channel divider output
2: SYSREF output |
|
All other cases | Powered down |