SA7026DK View Datasheet(PDF) - Philips Electronics
Part Name
Description
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SA7026DK Datasheet PDF : 14 Pages
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Philips Semiconductors
1.3GHz low voltage fractional-N dual synthesizer
Objective specification
SA7026
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
APPLICATIONS
• 500–1300 MHz wireless equipment
• Cellular phones
• Portable battery-powered radio equipment.
General description
The SA7026 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 1.3 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 could be greater than or equal to VDD.
The charge pump current (gain) is fixed by an external resistance at
pin RSET (pin ). Only passive loop filters are used; the charge-pump
operates within a wide voltage compliance range to provide a wider
tuning range.
LOCK 1
TEST 2
VDD 3
GND 4
RFin+ 5
RFin– 6
GNDCP 7
PHP 8
PHI 9
GNDCP 10
20 PON
19 STROBE
18 DATA
17 CLOCK
16 REFin+
15 REFin–
14 RSET
13 VDDCP
12 AUXin
11 PHA
SR01649
Figure 1. Pin Configuration
QUICK REFERENCE DATA
SYMBOL PARAMETER
VDD
VDDCP
IDDCP+IDD
IDDCP+IDD
fVCO
fAUX
fREF
fPC
Tamb
Supply voltage
Analog supply voltage
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
VDD
VDDCP ≥ VDD
Main and Aux. on
MIN.
2.7
2.7
–
–
500
10
10
–
–40
TYP.
–
–
7.5
1
–
–
–
–
MAX.
5.5
5.5
8.8
–
1300
550
40
4
+85
UNIT
V
V
mA
µA
MHz
MHz
MHz
MHz
°C
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
SA7026DK
TSSOP20
DESCRIPTION
Plastic thin shrink small outline package; 20 leads; body width 4.4 mm
VERSION
SOT360–1
1998 Oct 13
2
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