Philips Semiconductors
Product specification
Radio tuning PLL frequency synthesizer
SAA1057
• On-chip programmable current amplifier (charge pump)
GENERAL DESCRIPTION
to adjust the loop gain.
The SAA1057 is a single chip frequency synthesizer IC in
I2L technology, which performs all the tuning functions of a
PLL radio tuning system. The IC is applicable to all types
of radio receivers, e.g. car radios, hi-fi radios and portable
radios.
• Only one reference frequency for both AM and FM.
• High signal purity due to a sample and hold phase
detector for the in-lock condition.
• High tuning speed due to a powerful digital memory
phase detector during the out-lock condition.
Features
• Tuning steps for AM are: 1 kHz or 1,25 kHz for a VCO
• On-chip prescaler with up to 120 MHz input frequency.
frequency range of 512 kHz to 32 MHz.
• On-chip AM and FM input amplifiers with high sensitivity
• Tuning steps for FM are: 10 kHz or 12,5 kHz for a VCO
(30 mV and 10 mV respectively).
frequency range of 70 MHz to 120 MHz.
• Low current drain (typically 16 mA for AM and 20 mA for
FM) over a wide supply voltage range (3,6 V to 12 V).
• Serial 3-line bus interface to a microcomputer.
• Test/features.
• On-chip amplifier for loop filter for both AM and FM (up
to 30 V tuning voltage).
QUICK REFERENCE DATA
Supply voltage ranges
VCC1
3,6 to 12
3,6 to 12
VCC2 to 31
V
VCC2
V
VCC3
V
Supply currents
ICC1 + ICC2
ICC3
typ.
typ.
18
mA
mA
0,8
Input frequency ranges
at pin FAM
fFAM
fFFM
fXTAL
Tamb
512 kHz to 32 MHz
at pin FFM
70 to 120
MHz
MHz
°C
Maximum crystal input frequency
Operating ambient temperature range
>
4
−25 to + 80
PACKAGE OUTLINE
18-lead DIL; plastic (SOT102H); SOT102-1; 1996 September 2.
November 1983
2
NXP [ NXP ]
