SA8026 PDF даташит
Спецификация SA8026 изготовлена «Philips» и имеет функцию, называемую «2.5GHz low voltage fractional-N dual frequency synthesizer». |
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Детали детали
Номер произв | SA8026 |
Описание | 2.5GHz low voltage fractional-N dual frequency synthesizer |
Производители | Philips |
логотип |
18 Pages
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INTEGRATED CIRCUITS
SA8026
2.5GHz low voltage fractional-N
dual frequency synthesizer
Product specification
Supersedes data of 1999 Apr 16
1999 Nov 04
Philips
Semiconductors
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Philips Semiconductors
2.5GHz low voltage fractional-N dual frequency
synthesizer
Product specification
SA8026
GENERAL DESCRIPTION
The SA8026 BICMOS device integrates programmable dividers,
charge pumps and a phase comparator to implement a
phase-locked loop. The device is designed to operate from 3 NiCd
cells, in pocket phones, with low current and nominal 3 V supplies.
The synthesizer operates at VCO input frequencies up to 2.5 GHz.
The synthesizer has fully programmable main, auxiliary and
reference dividers. All divider ratios are supplied via a 3-wire serial
programming bus.
Separate power and ground pins are provided to the analog and
digital circuits. The ground leads should be externally short-circuited
to prevent large currents flowing across the die and thus causing
damage. VDDCP must be greater than or equal to VDD.
The charge pump current (gain) is set by an external resistance at
RSET pin. Passive loop filters could be used; the charge pump
operates within a wide voltage compliance range to provide a wider
tuning range.
FEATURES
• Low phase noise
• Low power
• Fully programmable main and auxiliary dividers
• Normal & Integral charge pumps outputs
• Fast Locking Adaptive mode design
• Internal fractional spurious compensation
• Hardware and software power down
• Split supply for VDD and VDDCP
LOCK 1
20 PON
TEST 2
19 STROBE
VDD 3
GND 4
18 DATA
17 CLOCK
RFin+ 5
16 REFin+
RFin– 6
15 REFin–
GNDCP 7
PHP 8
PHI 9
GNDCP 10
14 RSET
13 VDDCP
12 AUXin
11 PHA
SR01649
Figure 1. Pin Configuration
APPLICATIONS
• 350 to 2500 MHz wireless equipment
• Cellular phones (all standards)
• WLAN
• Portable battery-powered radio equipment.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
VDD
VDDCP
IDDCP+IDD
IDDCP+IDD
fVCO
fAUX
fREF
fPC
Tamb
Supply voltage
Analog supply voltage
Total supply current
Total supply current in power-down mode
Input frequency
Input frequency
Crystal reference input frequency
Maximum phase comparator frequency
Operating ambient temperature
CONDITIONS
VDDCP w VDD
Main and Aux. on
MIN.
2.7
2.7
–
–
350
20
5
–
–40
TYP.
–
–
10
1
–
–
–
–
MAX.
5.5
5.5
12
–
2500
550
40
4
+85
UNIT
V
V
mA
µA
MHz
MHz
MHz
MHz
°C
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME
SA8026DH
TSSOP20
DESCRIPTION
Plastic thin shrink small outline package; 20 leads; body width 4.4 mm
VERSION
SOT360–1
1999 Nov 04
2 853–2141 22633
No Preview Available ! |
Philips Semiconductors
2.5GHz low voltage fractional-N dual frequency
synthesizer
Product specification
SA8026
CLOCK
DATA
17
18
2–BIT SHIFT
REGISTER
STROBE
19
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
REFin+
REFin–
16
15
LATCH
MAIN DIVIDER
LATCH
REFERENCE
DIVIDER
SM
2 2 22
SA
COMP
PHASE
DETECTOR
8 PHP
9 PHI
1 LOCK
AUXin
12
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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