Rainbow-electronics MAX7057 Uživatelský manuál

General DescriptionThe MAX7057 frequency-programmable UHF transmit-ter is designed to transmit ASK/FSK data at a widerange of frequencies from 300MHz

MAX7057Due to the nature of the transmit PLL frequency divider,a fixed offset of 16 must be subtracted from the trans-mit PLL divider ratio for progra

Depending on the command, byte 1 through byte Nmay assume different functions. They may either be adirect command (write, read, read all, reset), or a

MAX7057300MHz to 450MHz Frequency-ProgrammableASK/FSK Transmitter12 __________________________________________________________________________________

Using a byte descriptive notation, the reset commandcan be viewed as the following sequence, within thesame CS cycle:SDI: <0x04>Features and Set

MAX7057300MHz to 450MHz Frequency-ProgrammableASK/FSK Transmitter14 __________________________________________________________________________________

The 4 MSBs of HIFREQ1 (fhi[15:12]) are the integerportion of the divider, excluding offset of 16. The 12LSBs (fhi[11:0]) are the fractional part of th

MAX7057These values are internally summed with 16, and thus,the min and max divider becomes approximately 19and 28. These limits MUST be followed, to

Applications InformationOutput Matching to 50ΩWhen matched to a 50Ω system, the MAX7057’s PA iscapable of delivering +9.2dBm of output power atPAVDD =

MAX7057300MHz to 450MHz Frequency-ProgrammableASK/FSK Transmitter18 __________________________________________________________________________________

MAX7057300MHz to 450MHz Frequency-ProgrammableASK/FSK TransmitterMaxim cannot assume responsibility for use of any circuitry other than circuitry enti

MAX7057300MHz to 450MHz Frequency-ProgrammableASK/FSK Transmitter2 ___________________________________________________________________________________

MAX7057300MHz to 450MHz Frequency-ProgrammableASK/FSK Transmitter_____________________________________________________________________________________

MAX7057300MHz to 450MHz Frequency-ProgrammableASK/FSK Transmitter4 ___________________________________________________________________________________

MAX7057300MHz to 450MHz Frequency-ProgrammableASK/FSK Transmitter_____________________________________________________________________________________

MAX7057300MHz to 450MHz Frequency-ProgrammableASK/FSK Transmitter6 ___________________________________________________________________________________

MAX7057300MHz to 450MHz Frequency-ProgrammableASK/FSK Transmitter_____________________________________________________________________________________

MAX7057300MHz to 450MHz Frequency-ProgrammableASK/FSK Transmitter8 ___________________________________________________________________________________

nates the problems associated with crystal-pulling FSKsignal generation. The multiplying factor of the PLL isset by a 16-bit number, with 4 bits for i