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AK1542A 데이터시트 PDF




AKM에서 제조한 전자 부품 AK1542A은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 AK1542A 기능
기능 20 to 600MHz Integer-N Frequency Synthesizer
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AK1542A 데이터시트, 핀배열, 회로
[AK1542A]
AK1542A
20 to 600MHz Integer-N Frequency Synthesizer
1. Overview
Consisting a highly accurate charge pump that supports current adjustment in 9 steps, a reference divider, a programmable
divider and a dual-modulus prescaler (P/P+1), the AK1542A provides high performance, low consumption current and small
footprint for a wide range of frequency conversions . This synthesizer also has two general-purpose output pins which allow it
to be used to control the RF front end.
An ideal Phase Locked Loop (PLL) can be achieved by combining the AK1542A 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
2.7 to 5.5V; and the supply voltage for the charge pump and that for the serial interface can be driven separately.
2. Features
Operating frequency:
20 to 600MHz
Programmable charge pump current:
158 to 2528A typical
The charge pump current can be changed in 9 steps; and the current
range can be adjusted by the external resistance.
Two current settings can be specified with the register and switched
over from one to another using the timer.
Supply Voltage:
2.7 to 5.5 V (PVDD pin)
Separate power supply for the charge pump: PVDD to 5.5V (CPVDD pin)
On-chip power-saving features
On-chip lock detection feature of PLL:
Direct output to the PFD (Phase frequency detector)
or digital filtering output can be selected.
General-purpose output:
It has two general-purpose output ports to control peripheral parts.
Very low consumption current:
2.2mA typical
Package:
24pin QFN (0.5mm pitch, 4mm4mm0.75mm)
Operating temperature:
-40C to 85C
MS1399-E-00
-1-
2012/3
http://www.Datasheet4U.com




AK1542A pdf, 반도체, 판매, 대치품
[AK1542A]
4. Pin Functional Description
Table 1 Pin Functions
No. Name I/O
Pin Functions
1 CPVDD P Power supply for charge pump
2 TEST3 DI Test pin 3, This pin must be connected to ground.
3 TEST1 DI Test pin 1, This pin must be connected to ground.
4 LE
DI Load enable
5 DATA DI Serial data input
6 CLK
DI Serial clock
7 LD
DO Lock detect
8 PDN2 DI Power down pin for PLL
9 PDN1 DI Power down signal for LDO
10 REFIN AI Reference input
11 TEST2 DI Test pin 2, This pin must be connected to ground.
12 GPO1 DO General-purpose output pin 1
13 GPO2 DO General-purpose output pin 2
14 DVSS G Digital ground pin
15 VREF AO Connect to LDO reference voltage capacitor
16 RFINN AI Prescaler input
17 RFINP AI Prescaler input
18 PVDD P Power supply for peripherals
19 BIAS
AIO Resistance pin for setting charge pump current
20 PVSS G Ground pin for peripherals
21 CP
AO Charge pump output
22 CPZ
AIO Connect to the loop filter capacitor
23 SWIN AI Connect to resistance pin for fast Lock Up
24 CPVSS G Ground pin for charge pump power supply
Power down
Remarks
“Low”
Internal pull-down,
Schmidt trigger input
Internal pull-down,
Schmidt trigger input
Schmidt trigger input
Schmidt trigger input
Schmidt trigger input
Schmidt trigger input
Schmidt trigger input
“Low”
“Low”
Internal pull-down,
Schmidt trigger input
“Low”
Hi-Z
Notes 1) & 2)
Notes 1) & 2)
Note 1) For detailed functional descriptions, see the section “Charge Pump and Loop Filter” in “8. Block Functional
Descriptions.
MS1399-E-00
-4-
2012/3

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AK1542A 전자부품, 판매, 대치품
[AK1542A]
7. Electrical Characteristics
1. Digital DC Characteristics
Table 4 Digital DC Characteristics
Parameter
Symbol
Conditions
Min. Typ. Max. Unit Remarks
High level input voltage
Vih
0.8VDD1
V Note 1)
Low level input voltage
Vil
0.2VDD1 V Note 1)
High level input current 1 Iih1
Vih = VDD1=5.5V
-1
1 µA Note 2)
High level input current 2 Iih2
Vih = VDD1=5.5V
27 55 110 µA Note 3)
Low level input current
Iil
Vil = 0V, VDD1=5.5V
-1
1 µA Note 1)
High level output voltage Voh
Ioh = -500µA
VDD1-0.4
V Note 4)
Low level output voltage Vol
Iol = 500µA
0.4 V Note 4)
Note 1) Applied to [CLK], [DATA], [LE], [PDN1], [PDN2], [TEST1], [TEST2] and [TEST3] pins.
Note 2) Applied to [CLK], [DATA], [LE] , [PDN1]and [PDN2] pins.
Note 3) Applied to [TEST1], [TEST2] and [TEST3] pins.
Note 4) Applied to [LD], [GPO1] and [GPO2] pins.
MS1399-E-00
-7-
2012/3

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AK1542A

20 to 600MHz Integer-N Frequency Synthesizer

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