LC7152, 7152M, 7152NM, 7152KM
Dual Charge Pump Descriptions
(Unlock detector output)
(Secondary charge pump output)
(Main charge pump output)
(Low-pass filter output)
If an unlock state is detected at channel switch, the sub-charge pump operates, R1M/R1S becomes R1, low-pass filter’s time
constant is reduced, and the lockup accelerates.
When the circuit is locked, side-band characteristics and modulation characteristics are improved by making the sub-charge pump
off, i.e., floating, R1M to be R1, and increasing low-pass filter’s time constant.
Device Comparison
Device
LC7152
LC7152M
LC7152NM
LC7152KM
FA/FB = 0
1.5 to 23 MHz
Yes
Yes
Yes
Yes
Operating frequency
FA/FB = 1
20 to 55 MHz
55 to 80 MHz
Yes
No
Yes
No
Yes
No
Yes
Yes
(VDD = 2.7 to 3.3 V)
Power-on reset
circuit
No
No
Yes
No
Package
DIP24S
MFP24S
MFP24S
MFP24S
No.3889-12/13