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PE97022 Datasheet, PDF (4/14 Pages) Peregrine Semiconductor Corp. – 3500 MHz UltraCMOS Integer-N PLL Rad Hard for Space Applications
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PE97022
Product Specification
Table 1. Pin Descriptions (continued)
Pin No. Pin Name
Interface Mode
Type
31
VDD-fp
ALL
(Note 1)
32
Dout
Serial, Parallel
Output
33
VDD
ALL
(Note 1)
34
CEXT
ALL
Output
35
VDD
ALL
36
PD_U
ALL
(Note 1)
Output
Description
VDD for fp. Can be left floating or connected to GND to disable the fp output.
Data Out. The MSEL signal and the raw prescaler output are available on Dout
through enhancement register programming.
Power supply input. Input may range from 2.85 V to 3.45 V. Bypassing
recommended.
Logical “NAND” of PD_U and PD_D terminated through an on chip, 2 kΩ series
resistor. Connecting CEXT to an external capacitor will low pass filter the input to the
inverting amplifier used for driving LD.
Power supply input. Input may range from 2.85 V to 3.45 V. Bypassing
recommended.
PD_D is pulse down when fp leads fc.
37
PD_U
ALL
PD_U is pulse down when fc leads fp.
38
VDD-fc
ALL
39
fc
ALL
40
GND
ALL
(Note 1)
Output
VDD for fc. Can be left floating or connected to GND to disable the fc output.
Monitor pin for reference divider output. Switching activity can be disabled through
enhancement register programming or by floating or grounding VDD pin 38.
Ground.
41
GND
ALL
Ground.
42
fr
ALL
Input
Reference frequency input.
43
LD
44
Enh
ALL
Serial, Parallel
Output
Input
Lock detect and open drain logical inversion of CEXT. When the loop is in lock, LD is
high impedance, otherwise LD is a logic low (“0”).
Enhancement mode. When asserted low (“0”), enhancement register bits are
functional.
Notes: 1. VDD pins 1, 11, 12, 23, 31, 33, 35, and 38 are connected by diodes and must be supplied with the same positive voltage level.
VDD pins 31 and 38 are used to enable test modes and should be left floating.
2. All digital input pins have 70 kΩ pull-down resistors to ground.
©2010-2013 Peregrine Semiconductor Corp. All rights reserved.
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Document No. 70-0235-07 │ UltraCMOS® RFIC Solutions
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