AD9510BCPZ Analog Devices Inc, AD9510BCPZ Datasheet - Page 30

• Manufacturer Part Number: AD9510BCPZ
• Description: IC CLOCK DIST 8OUT PLL 64LFCSP
• Manufacturer: Analog Devices Inc
• Type: Fanout Buffer (Distribution), Divider, PLLr

Specifications of AD9510BCPZ

• Number Of Circuits: 1
• Ratio - Input:output: 2:8
• Differential - Input:output: Yes/Yes
• Input: Clock
• Output: CMOS, LVDS, LVPECL
• Frequency - Max: 1.2GHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LFCSP
• Frequency-max: 1.2GHz
• Clock Ic Type: Clock Distribution
• Ic Interface Type: Serial
• Frequency: 1.2GHz
• No. Of Outputs: 8
• No. Of Multipliers / Dividers: 8
• Supply Voltage Range: 3.135V To 3.465V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AD9510-VCO/PCBZ - BOARD EVALUATION FOR AD9510AD9510/PCBZ - BOARD EVALUATION FOR AD9510
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

AD9510
Table 14. PLL Prescaler Modes
Mode
(FD = Fixed Divide
DM = Dual Modulus)
FD
FD
P = 2 DM
P = 4 DM
P = 8 DM
P = 16 DM
P = 32 DM
FD
When using the prescaler in FD mode, the A counter is not
used, and the B counter may need to be bypassed. The DM
prescaler modes set some upper limits on the frequency, which
can be applied to CLK2. See Table 15.
Table 15. Frequency Limits of Each Prescaler Mode
Mode (DM = Dual Modulus)
P = 2 DM (2/3)
P = 4 DM (4/5)
P = 8 DM (8/9)
P = 16 DM
P = 32 DM
000
001
010
011
100
101
110
111
Value in 0Ah<4:2>
CLK2
<600 MHz
<1000 MHz
<1600 MHz
<1600 MHz
<1600 MHz
Divide By
1
2
P/P + 1 = 2/3
P/P + 1 = 4/5
P/P + 1 = 8/9
P/P + 1 = 16/17
P/P + 1 = 32/33
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A and B Counters
The AD9510 B counter has a bypass mode (B = 1), which is not
available on the ADF4106. The B counter bypass mode is valid
only when using the prescaler in FD mode. The B counter is
bypassed by writing 1 to the B counter bypass bit (0Ah<6> =
1b). The valid range of the B counter is 3 to 8191. The default
after a reset is 0, which is invalid.
Note that the A counter is not used when the prescaler is in
FD mode.
Note also that the A/B counters have their own reset bit,
which is primarily intended for testing. The A and B counters
can also be reset using the R, A, and B counters’ shared reset bit
(09h<0>).
Determining Values for P, A, B, and R
When operating the AD9510 in a dual-modulus mode, the
input reference frequency, F
frequency, F
When operating the prescaler in fixed divide mode, the A
counter is not used and the equation simplifies to
By using combinations of dual modulus and fixed divide
modes, the AD9510 can achieve values of N all the way down
to N = 1. Table 16 shows how a 10 MHz reference input may be
locked to any integer multiple of N. Note that the same value of
N may be derived in different ways, as illustrated by N = 12.
F
F
VCO
VCO
= (F
= (F
VCO.
REF
REF
/R) × (PB + A) = F
/R) × (PB) = F
REF
, is related to the VCO output
REF
× N/R
REF
× N/R