Datasheet

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M
= x
vco ref
N
f f
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DAC5682Z
SLLS853E –AUGUST 2007–REVISED AUGUST 2012 www.ti.com
Register name: CONFIG9 – Address: 0x09, Default = 0x00
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PLL_m(4:0) PLL_n(2:0)
0 0 0 0 0 0 0 0
PLL_m: M portion of the M/N divider of the PLL thermometer encoded:
PLL_m(4:0) M value
00000 1
00001 2
00011 4
00111 8
01111 16
11111 32
All other values Invalid
PLL_n: N portion of the M/N divider of the PLL thermometer encoded. If supplying a high rate CLKIN
frequency, the PLL_n value should be used to divide down the input CLKIN to maintain a maximum
PFD operating of 160 MHz.
PLL_n(2:0) N value
000 1
001 2
011 4
111 8
All other values Invalid
PLL Function:
where ƒ
ref
is the frequency of the external DAC clock input on the CLKIN/CLKINC pins.
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