AK1547 PDF даташит
Спецификация AK1547 изготовлена «AKM» и имеет функцию, называемую «4GHz Low Noise Integer-N Frequency Synthesizer». |
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Детали детали
Номер произв | AK1547 |
Описание | 4GHz Low Noise Integer-N Frequency Synthesizer |
Производители | AKM |
логотип |
37 Pages
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[AK1547]
AK1547
4GHz Low Noise Integer-N Frequency Synthesizer
1. Overview
The AK1547 is an Integer-N PLL (Phase Locked Loop) frequency synthesizer, covering a wide range of frequency
from 500MHz to 4GHz. Consisting of a highly accurate charge pump, a reference divider, a programmable divider
and a dual-modulus prescaler (P/P+1), this product provides high performance, very low Phase Noise and small
footprints.
An ideal PLL can be achieved by combining the AK1547 with the external loop filter and VCO (Voltage Controlled
Oscillator). Access to the registers is controlled via a 3-wire serial interface. The operating supply voltage is from
2.7V to 5.5V, and the charge pump circuit and the serial interface can be driven by individual supply voltage.
2. Features
Operating frequency :
Programmable charge pump current :
Fast lock mode for improved lock time :
Supply Voltage :
Separate Charge Pump Power Supply :
Excellent Phase Noise :
On-chip lock detection feature of PLL :
Digit
Package :
Operating temperature :
500MHz to 4GHz
650μA to 5200μA typical with 8steps
The current range can be controlled by an external resistor.
The programmable timer can switch two charge pump
current setting.
2.7 to 5.5 V (PVDD, AVDD pins)
PVDD to 5.5V (CPVDD pin)
-218dBc/Hz
Selectable P hase F requency D etector (P FD) Output o r
al filtered lock detect
20pin QFN (0.5mm pitch, 4mm×4mm×0.75mm)
-40°C to 85°C
MS1464-E-00
1
2012/9
http://www.Datasheet4U.com
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[AK1547]
- Table of Contents -
1. Overview ____________________________________________________________________________ 1
2. Features ____________________________________________________________________________ 1
3. Block Diagram _______________________________________________________________________ 3
4. Pin Functional Description and Assignments _____________________________________________ 4
5. Absolute Maximum Ratings ____________________________________________________________ 6
6. Recommended Operating Range ________________________________________________________ 6
7. Electrical Characteristics ______________________________________________________________ 7
8. Block Functional Descriptions _________________________________________________________ 11
9. Register Map _______________________________________________________________________ 17
10. Function Description - Registers _______________________________________________________ 19
11. IC Interface Schematic _______________________________________________________________ 28
12. Recommended Connection Schematic of Off-Chip Component _____________________________ 30
13. Power-Up Timing Chart (Recommended Flow)____________________________________________ 32
14. Frequency setting Timing Chart (Recommended Flow) ____________________________________ 33
15. Typical Evaluation Board Schematic ____________________________________________________ 34
16. Outer Dimensions ___________________________________________________________________ 35
17. Marking ____________________________________________________________________________ 36
In this specification, the following notations are used for specific signal and register names.
[Name] : Pin name
<Name> : Register group name (Address name)
{Name} : Register bit name
MS1464-E-00
2
2012/9
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3. Block Diagram
[AK1547]
REFIN
CLK
DATA
LE
RFINP
RFINN
VBG
R COUNTER
14 bit
REGISTER
24 bit
PHASE
FREQENCY
DETECTOR
LOCK DETECT
SWALLOW
COUNTER
6 bit
PROGRAMABLE
COUNTER
13 bit
N DIVIDER
+ PRESCALER
- 8/9,16/17,32/33,64/65
CHARGE
PUMP
FAST
COUNTER
BIAS
CP
LD
Fig. 1 Block Diagram
MS1464-E-00
3
2012/9
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DataSheet26.com | 2020 | Контакты | Поиск |