74HCT9046AD,118 NXP Semiconductors, 74HCT9046AD,118 Datasheet - Page 13

• Manufacturer Part Number: 74HCT9046AD,118
• Description: IC PLL BAND GAP CNTRL VCO 16SOIC
• Manufacturer: NXP Semiconductors
• Type: Phase Lock Loop (PLL)r
• Series: 74HCTr

Specifications of 74HCT9046AD,118

• Number Of Circuits: 1
• Package / Case: 16-SOIC (3.9mm Width)
• Pll: Yes
• Input: Clock
• Output: Clock
• Ratio - Input:output: 2:2
• Differential - Input:output: No/No
• Frequency - Max: 16MHz
• Divider/multiplier: No/No
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Frequency-max: 16MHz
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 4.5 V to 5.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-1570-2; 74HCT9046AD-T; 935044180118

NXP Semiconductors
74HCT9046A_6
Product data sheet
Fig 12. Simple loop filter for PC2 without damping
R bias
I
17
cp
a. Simple loop filter for PC2
without damping
1
=
INPUT
R
----------- -
17
8.4 Loop filter component selection
bias
C2
C2
Using this equivalent resistance R3' for the filter design the voltage can now be expressed
as a transfer function of PC2; assuming ripple (f
Again this illustrates the supply voltage independent behavior of PC2.
Examples of PC2 combined with a passive filter are shown in
shows that PC2 with only a C2 filter behaves as a high-gain filter. For stability the damped
version of
Practical design values for R
to 15 k for the filter design. Higher values for R3' require lower values for the filter
capacitance which is very advantageous at low values of the loop natural frequency
K
I
cp
PC2
=
001aak449
OUTPUT
R3' C2
=
----- - V r
4
5
Figure 13
F
A
(j )
with series resistance R4 is preferred.
Rev. 06 — 15 September 2009
b. Amplitude characteristic
F
1/ A
j
bias
1
=
are between 25 k and 250 k with R3' = 1.5 k
---------------------------- -
1 A
+
1
j
001aak450
1
----------- -
j
r
1
= f
1
PLL with band gap controlled VCO
i
) is suppressed, as:
c. Pole zero diagram
Figure 12
A = DC gain limit, due to leakage
74HCT9046A
© NXP B.V. 2009. All rights reserved.
and 13.
001aak451
1/ A
1
Figure 12
13 of 43
n
.