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CD4046BMS Datasheet, PDF (8/11 Pages) Intersil Corporation – CMOS Micropower Phase Locked Loop
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CD4046BMS
Block Diagram
*
SIGNAL 14
IN
16 VDD
COMPARATOR
IN *
3
÷N
VCO
OUT
4
C1
VSS
VSS
6
7
R1
11
R2
12
*5
INHIBIT
PHASE
COMPARATOR I
PHASE
COMPARATOR
II
VCO
SOURCE
FOLLOWER
PHASE COMP. I OUT
2
PHASE COMP. II OUT
13
1
PHASE PULSES
*VCO IN
9
DEMODULATOR OUT
10
RS
*ALL INPUTS ARE PROTECTED
BY CMOS PROTECTION
NETWORK
VDD
R3
LOW
PASS
FILTER
C2
VSS
VSS
VSS 8
15 ZENER
VSS
FIGURE 3. CMOS PHASE-LOCKED LOOP BLOCK DIAGRAM
Typical Performance Characteristics
RI = 10kΩ AMBIENT TEMPERATURE (TA) = +25oC
VCOIN = VDD/2, R2 = ∞, INHIBIT = VSS
106
105
104
SUPPLY VOLTAGE
(VDD) = 15V
103
RI = 1MΩ
10V
102 RI = 100kΩ 5V
5V
15V
10
10V
5V
10V
1
15V
10-5
10-4
10-3
10-2
10-1
1
10
VCO TIMING CAPACITOR (CI) (µF)
TYPICAL CENTER FREQUENCY UNIT-TO-UNIT
VARIATION
VDD (V)
∆f/fO (%)
5
±50
10
±30
15
±35
FIGURE 4. TYPICAL CENTER FREQUENCY AS A FUNCTION
OF C1 AND R1 AT VDD = 5V, 10V, AND 15V
106 RI = 10kΩ
105
RI = 100kΩ
104
RI = 1MΩ
103
102
10
SUPPLY VOLTAGE (VDD) = 10V
VCOIN = VDD/2, R = ∞, INHIBIT = VSS
AMBIENT TEMPERATURE (TA) = -55oC
-55oC
+125oC
-55oC
+125oC
-55oC
+125oC
1
10-5
10-4
10-3
10-2
10-1
1
10
VCO TIMING CAPACITOR (CI) (µF)
FIGURE 5. CENTER FREQUENCY AS A FUNCTION OF C1 AND
R1 FOR AMBIENT TEMPERATURE OF -55oC to
+125oC
7-893
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