SA7026 查看數據表（PDF） - Philips Electronics
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SA7026 Datasheet PDF : 18 Pages
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Philips Semiconductors
1.3GHz low voltage fractional-N dual synthesizer
Product specification
SA7026
17
CLOCK
18
DATA
2–BIT SHIFT
REGISTER
19
STROBE
ADDRESS DECODER
22–BIT SHIFT
REGISTER
CONTROL
LATCH
VDD
3
PUMP
CURRENT
SETTING
PUMP
BIAS
VDDCP
13
14
RSET
LOAD SIGNALS
RFin+
RFin–
5
6
AMP
16
REFin+
REFin–
15
LATCH
MAIN DIVIDER
LATCH
REFERENCE
DIVIDER
SM
2 2 22
SA
COMP
PHASE
DETECTOR
8
PHP
9
PHI
1
LOCK
12
AUXin
TEST
AMP
2
LATCH
AUX DIVIDER
4
GND
Figure 2. Block Diagram
PINNING
SYMBOL
LOCK
TEST
VDD
GND
RFin+
RFin–
GNDCP
PHP
PHI
GNDCP
PIN
DESCRIPTION
1 Lock detect output
2 Test (should be either grounded or
connected to VDD)
3 Digital supply
4 Digital ground
5 RF input to main divider
6 RF input to main divider
7 Charge pump ground
8 Main normal charge pump
9 Main integral charge pump
10 Charge pump ground
SYMBOL
PHA
AUXin
VDDCP
RSET
REFin–
REFin+
CLOCK
DATA
STROBE
PON
PHASE
DETECTOR
7, 10
GNDCP
11
PHA
20
PON
SR01496
PIN
DESCRIPTION
11 Auxiliary charge pump output
12 Input to auxiliary divider
13 Charge pump supply voltage
14 External resistor from this pin to ground
sets the charge pump current
15 Reference input
16 Reference input
17 Programming bus clock input
18 Programming bus data input
19 Programming bus enable input
20 Power down control
1999 Nov 04
3
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