厂商：Freescale
类别：16位单片机
厂商：Linear
类别：DC/DC控制器
厂商：
类别：PhotoMOS(MOSFET输出光电耦合器)
类别：RS232/RS562 收发器
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特点Dual Band RF Power Amplifier Control (LTC1757A-2)Improved Internal Schottky Diode DetectorWide Input Frequency Range: 850MHz to 2GHzAutozero Cancels Initial Offsets and Temperature Dependent Offset Errors Wide V IN Range of 2.7V to 6V Allows Direct Connection to Battery RF Output Power Set by External DACFast Acquire After Transmit EnableInternal Frequency CompensationRail-to-Rail Power Control OutputsRF PA Supply Current LimitingBattery Overvoltage ProtectionPower Control Signal Overvoltage ProtectionLow Operating Current: 1mAVery Low Shutdown Current: <1μAAvailable in a 8-Pin MSOP Package (LTC1757A-1) and 10-Pin MSOP (LTC1757A-2)典型应用描述The LTC1757A-1 is a single output RF power controller that is identical in performance to the LTC1757A-2 except that one output (V PCA ) is provided. The LTC1757A-1 can be used to drive a single RF channel or dual channel module with integral multiplexer. This part is available in an 8-pin MSOP package.RF power is controlled by driving the RF amplifier power control pins and sensing the resultant RF output power via a directional coupler. The RF sense voltage is peak detected using an on-chip Schottky diode. This detected voltage is compared to the DAC voltage at the PCTL pin to control the output power. The RF power amplifier is protected against high supply voltage and current and high power control pin voltages.Internal and external offsets are cancelled over temperature by an autozero control loop, allowing accurate low power programming. The shutdown feature disables the part and reduces the supply current to <1μA.