Datasheet

Complete, Direct-Conversion
Tuner for DVB-S2 Applications
Table 2. N-Divider MSB Register
BIT NAME BIT LOCATION (0 = LSB) DEFAULT FUNCTION
FRAC 7 1 Users must program to 1 upon powering up the device.
N[14:8] 6–0 0000000
Sets the most significant bits of the PLL integer-divide number (N). N can
range from 19 to 251.
Table 3. N-Divider LSB Register
BIT NAME BIT LOCATION (0 = LSB) DEFAULT FUNCTION
N[7:0] 7–0 00100011
Sets the least significant bits of the PLL integer-divide number. N can range
from 19 to 251.
Table 4. Charge-Pump Register
BIT NAME BIT LOCATION (0 = LSB) DEFAULT FUNCTION
CPMP[1:0] 7–6 00
Charge-pump minimum pulse width. Users must program to 00 upon
powering up the device.
CPLIN[1:0] 5–4 00
Controls charge-pump linearity. Users must program to 01 upon powering up
the device.
F[19:16] 3–0 0010
S ets the 4 m ost si g ni fi cant b i ts of the P LL fr acti onal d i vi d e num b er .
D efaul t val ue i s F = 194,180 d eci m al .
Table 5. F-Divider MSB Register
BIT NAME BIT LOCATION (0 = LSB) DEFAULT FUNCTION
F[15:8] 7–0 11110110
S ets the m ost si g ni fi cant b i ts of the P LL fr acti onal - d i vi d e num b er ( F) .
D efaul t val ue i s F = 194,180 d eci m al .
Table 6. F-Divider LSB Register
BIT NAME BIT LOCATION (0 = LSB) DEFAULT FUNCTION
F[7:0] 7–0 10000100
S ets the l east si g ni fi cant b i ts of the P LL fr acti onal - d i vi d e num b er ( F) .
D efaul t val ue i s F = 194,180 d eci m al .
Table 7. XTAL Buffer and Reference Divider Register
BIT NAME BIT LOCATION (0 = LSB) DEFAULT FUNCTION
XD[2:0] 7–5 000
Sets the crystal-divider setting.
000 = Divide by 1.
001 = Divide by 2.
011 = Divide by 3.
100 = Divide by 4.
101 through 110 = All divide values from 5 (101) to 7 (110).
111 = Divide by 8.
R[4:0] 4–0 00001
Sets the PLL reference-divider (R) number. Users must program to 00001
upon powering up the device.
00001 = Divide by 1; other values are not tested.
MAX2112
10
Maxim Integrated