Rainbow-electronics DS1870 Manual do Utilizador

General DescriptionThe DS1870 is a dual-channel bias controller targetedtoward class AB LDMOS RF power-amplifier applica-tions. It uses lookup tables

DS1870LDMOS RF Power-Amplifier Bias Controller10 ____________________________________________________________________Detailed DescriptionThe DS1870 is

DS1870LDMOS RF Power-Amplifier Bias Controller____________________________________________________________________ 11Temperature-Monitor OperationThe

DS1870LDMOS RF Power-Amplifier Bias Controller12 ____________________________________________________________________The temperature tables (LUT 2 and

DS1870LDMOS RF Power-Amplifier Bias Controller____________________________________________________________________ 13the full-scale (FS) value. The ex

DS1870LDMOS RF Power-Amplifier Bias Controller14 ____________________________________________________________________As the device powers up, the VCCL

DS1870LDMOS RF Power-Amplifier Bias Controller____________________________________________________________________ 15LOWER MEMORYWORD 0 WORD 1 WORD 2

DS1870LDMOS RF Power-Amplifier Bias Controller16 ____________________________________________________________________TABLE 1 ( CONFIGURATION )WORD 0 W

DS1870LDMOS RF Power-Amplifier Bias Controller____________________________________________________________________ 17TABLE 2 (POT1 TEMP LUT)WORD 0 WOR

DS1870LDMOS RF Power-Amplifier Bias Controller18 ____________________________________________________________________TABLE 3 ( POT2 TEMP LUT)WORD 0 WO

DS1870LDMOS RF Power-Amplifier Bias Controller____________________________________________________________________ 19TABLE 4 ( POT1 DRAIN LUT)WORD 0 W

DS1870LDMOS RF Power-Amplifier Bias Controller2 _____________________________________________________________________ABSOLUTE MAXIMUM RATINGSRECOMMEND

DS1870LDMOS RF Power-Amplifier Bias Controller20 ____________________________________________________________________Register DescriptionThe register

DS1870LDMOS RF Power-Amplifier Bias Controller____________________________________________________________________ 21A2D Value0Temp Value <R><

DS1870LDMOS RF Power-Amplifier Bias Controller22 ____________________________________________________________________PWEPWE <W><V><FFFF

DS1870LDMOS RF Power-Amplifier Bias Controller____________________________________________________________________ 23T Index <R><NA><00

DS1870LDMOS RF Power-Amplifier Bias Controller24 ____________________________________________________________________I2C DefinitionsThe following term

DS1870LDMOS RF Power-Amplifier Bias Controller____________________________________________________________________ 25setup and hold time requirements

DS1870LDMOS RF Power-Amplifier Bias Controller26 ____________________________________________________________________dition, and write the slave addre

DS1870LDMOS RF Power-Amplifier Bias Controller____________________________________________________________________ 27See Figure 5 for a read example u

DS1870LDMOS RF Power-Amplifier Bias ControllerMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a

DS1870LDMOS RF Power-Amplifier Bias Controller_____________________________________________________________________ 3ANALOG VOLTAGE-MONITORING CHARACT

DS1870LDMOS RF Power-Amplifier Bias Controller4 _____________________________________________________________________LOOKUP TABLE CHARACTERISTICS(VCC=

DS1870LDMOS RF Power-Amplifier Bias Controller_____________________________________________________________________ 5AC ELECTRICAL CHARACTERISTICS (VC

DS1870LDMOS RF Power-Amplifier Bias Controller6 _____________________________________________________________________Typical Operating Characteristics

DS1870LDMOS RF Power-Amplifier Bias Controller_____________________________________________________________________ 7Typical Operating Characteristics

DS1870LDMOS RF Power-Amplifier Bias Controller8 _____________________________________________________________________Pin DescriptionPIN NAME FUNCTION1

DS1870LDMOS RF Power-Amplifier Bias Controller_____________________________________________________________________ 9Functional Diagram∑∑++++∑++MUX13-