SA7025 Datasheet, PDF (2/22 Pages) NXP Semiconductors – Low-voltage 1GHz fractional-N synthesizer

Philips Semiconductors
1GHz low-voltage Fractional-N synthesizer
Product specification
SA7025
DESCRIPTION
The SA7025 is a monolithic low power, high performance dual
frequency synthesizer fabricated in QUBiC BiCMOS technology.
Featuring Fractional-N division with selectable modulo 5 or 8
implemented in the Main synthesizer to allow the phase detector
comparison frequency to be five or eight times the channel spacing.
This feature reduces the overall division ratio yielding a lower noise
floor and faster channel switching. The phase detectors and charge
pumps are designed to achieve phase detector comparison
frequencies up to 5MHz. A triple modulus prescaler (divide by
64/65/72) is integrated on chip with a maximum input frequency of
1.04GHz. Programming and channel selection are realized by a
high speed 3-wire serial interface.
FEATURES
• Operation up to 1.04GHz
• Fast locking by “Fractional-N” divider
• Auxiliary synthesizer
• Digital phase comparator with proportional and integral charge
pump output
• High speed serial input
• Low power consumption
• Programmable charge pump currents
• Supply voltage range 2.7 to 5.5V
• Excellent input sensitivity: V_{RF_IN} = –20dBm
APPLICATIONS
• NADC (North American Digital Cellular)
• PDC (Personal Digital Cellular)
• Cellular radio
• Spread-spectrum receivers
PIN CONFIGURATION
DK Package
CLOCK ₁
DATA 2
STROBE ³
V_SS 4
RF_IN 5
RF_IN 6
V_CCP 7
REF_IN 8
RA 9
AUX_{IN 10}
20 ^VDD
19 TEST
18 ^LOCK
17 RF
16 _RN
15 V_DDA
14 PHP
13 PHI
12 V_SSA
11 PHA
Figure 1. Pin Configuration
SR00600
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic Shrink Small Outline Package (SSOP)
TEMPERATURE RANGE
–40 to +85°C
ORDER CODE
SA7025DK
DWG #
SOT266-1
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
V
V_IN
T_STG
T_A
Supply voltage, V_DD, V_DDA, V_CCP
Voltage applied to any other pin
Storage temperature range
Operating ambient temperature range
NOTE: Thermal impedance (θ_JA) = 117°C/W. This device is ESD sensitive.
RATING
-0.3 to +6.0
-0.3 to (V_DD + 0.3)
-65 to +150
-40 to +85
UNITS
V
V
°C
°C
1996 Aug 6
2
853-1786 17157