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CC2590RGVT Datasheet(PDF) 9 Page - Texas Instruments |
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CC2590RGVT Datasheet(HTML) 9 Page - Texas Instruments |
9 / 18 page Controlling the Output Power from CC2590 Input Levels on Control Pins Connecting CC2590 to a CC24xx Device RF_P RXTX RF_N RF_P TXRX_SWITCH RF_N CC24xx RREG_OUT (CC243x,CC2480), VREGOUT (CC2420),GIO1(CC2400) Alternatively VDD/GND to /MCU (CC2420) Alternatively fromMCU RF_P RXTX RF_N = PCBtraceinductor CC2590 ANT PAEN EN HGM VDD VDD VDD RF_P RXTX RF_N L112 C113 C111 L111 C112 C161 C101/C102 C131/C132 R151 P1_1(CC243x),GPIO1(CC2480), GIO6(CC2400) L21 CC2590 www.ti.com ........................................................................................................................................................................................ SWRS080 – SEPTEMBER 2008 The output power of CC2590 is controlled by controlling the input power. The CC2590 PA is designed to work in compression (class AB), and the best efficiency is reached when a strong input signal is applied. The four digital control pins (PAEN, EN, HGM, RXTX) have built-in level-shifting functionality, meaning that if the CC2590 is operating from a 3.6-V supply voltage, the control pins will still sense 1.6-V - 1.8-V signals as logical ‘1’. An example of the above would be that RXTX is connected directly to the RXTX pin on CC24xx, but the global supply voltage is 3.6-V. The RXTX pin on CC24xx will switch between 0-V (RX) and 1.8-V(TX), which is still a high enough voltage to control the mode of CC2590. The input voltages should however not have logical ‘1’ level that is higher than the supply. Table 3. Control Logic for Connecting CC2590 to a CC24xx Device PAEN = EN RXTX HGM MODE OF OPERATION 0 X X Power Down 1 0 0 RX Low Gain Mode 1 0 1 RX High Gain Mode 1 1 X TX Figure 11. CC2590 + CC24xx Application Circuit Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s): CC2590 |
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