Audio ASSP | LC72121
PLL 频率合成器，用于电子调谐
概览
LC72121 是一款高输入灵敏度（130 MHz 时 20 mVrms）PLL 频率合成器，用于 3 V 系统。该集成电路与 LC72131 可实现串行数据兼容，并具有高性能 AM/FM 调谐器所需的更高输入灵敏度和更低杂散辐射（由重新设计的接地系统提供）。
- PLL frequency synthesizer for 3 V systems
- High-speed programmable divider
FMIN: 10 to 160 MHz ... Pulse swallower technique
(With built-in divide-by-2 prescaler)
AMIN: 2 to 40 MHz ... Pulse swallower technique
0.5 to 10 MHz ... Direct division technique - IF counter
IFIN: 0.4 to 15 MHz ... For AM and FM IF counting - Reference frequency
One of 12 reference frequencies can be selected
(using a 4.5 or 7.2 MHz crystal element)
1, 3, 5, 9, 10, 3.125, 6.25, 12.5, 15, 25, 50, and 100 kHz - Phase comparator
Supports dead zone control.
Built-in unlocked state detection circuit
Built-in deadlock clear circuit - An MOS transistor for an active low-pass filter is built in.
- I/O ports
Output-only ports: 4 pins
I/O ports: 2 pins
Supports the output of a clock time base signal. - Operating ranges
Supply voltage: 2.7 to 3.6 V
Operating temperature: -40 to 85°C
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Pb
A
H
P
PDIP-24 / DIP-24S
NA
0
FNFLD
22
No
PLL Frequency Synthesizer
Serial
8000
350
2.7
3.6
-40
85
Price N/A
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