AK1574

MP

46.875MHz ~ 1682.5MHz Fractional-N PLL with integrated VCO and FM / FSK modulator

46.875MHz ~ 1682.5MHz Fractional-N PLL with integrated VCO and FM / FSK modulator

MP

Description

The AK1574 is a fractional-N PLL synthesizer with a VCO (Voltage Controlled Oscillator) that has frequency modulation function. It integrates an output divider for VCO signal that operates by 3365MHz frequency at maximum realizing wide range output frequency from 46.875MHz to 1682.5MHz. 
The AK1574 reduces the power consumption while realizing low normalized phase noise of -221dBc/Hz. It achieves 90mW (3V Single output) operation when outputting -6dBm. It is capable of replacing VCOs, that use to consist of variable capacitance diode and etc., in various wireless applications especially suitable for hand portable wireless devices. The fast lock-up, that completes in only less than 1ms, suites for intermittent operation of PLL / VCO. It contributes to reducing the system power consumption.
Two set of mode settings that include frequency setting and On / Off settings of RF output pins are available. 
   Output Mode A | Frequency setting fRx, RFOUT_A On, RFOUT_B Off (Single output)
   Output Mode B | Frequency setting fTx, RFOUT_A Off, RFOUT_B On (Single output)
 By setting as above, the RFOUT_A-pin can be used as receiving output and the RFOUT_B-pin can be used as transmitting output.
   Output Mode A | Frequency fRx, RFOUT_A On, RFOUT_B On (Differential Output)
 By setting as above, two lines of common-frequency can be output. It is able to use for diversity receivers. When both RFOUT_A and B are On, the signal is output as differential signal so that it is capable of being used as single differential output. 

 Data input format for frequency modulation corresponds to both analog and digital data inputs. Digital I / F data format can be selected from I²S (Inter-IC Sound), Left-justified and SPI.

Key Features

  • Low current consumption. / Low noise.

Applications

  •                                 Professional Mobile Radio (DMR, NXDN, dPMR, TIA-603, STD-T98 / 102, etc.) ,  FM / FSK transmitter  etc.
                                

Specifications

Part Number
AK1574
Description
Fractional-N + VCO
RF Frequency (MIN.) [MHz]
47
RF Frequency (TYP.) [MHz]

                                
RF Frequency (MAX.) [MHz]
1682
REF Frequency (MIN.) [MHz]
10
REF Frequency (TYP.) [MHz]

                                
REF Frequency (MAX.) [MHz]
60
PFD Frequency [MHz]
60 or less
Normalized Phase Noise [dBc/Hz]
-221
Current Consumption [mA]
30 or more
Other

                                
Operating Temperature [℃]
-40 to 85
Device Package
HWQFN
Number of Pins
36

Product Information

Part Status
MP
Pb Free
Yes
Halogen Free
Yes
MSL
MSL2
Packaging
TAPE
JEDEC Standard Packaging
Compliant
Minimum Order Quantity [pcs.]
1000
Replacement P/N

                                

Block Diagram

Block Diagram