厂商：Freescale
类别：16位单片机
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
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特点Dual Band RF Power Amplifier Control (LTC1758-2)Internal Schottky Diode Detector with Improved Dynamic Range vs LTC1757AWide Input Frequency Range: 850MHz to 2GHzAutozero Loop Cancels Offset Errors and Temperature Dependent Offsets Wide V IN Range: 2.7V to 6V Allows Direct Connection to Battery RF Output Power Set by External DAC250kHz Control Loop BandwidthFast Acquire After Transmit EnableInternal Frequency CompensationRail-to-Rail Power Control OutputsPower Control Signal Overvoltage ProtectionLow Operating Current: 1mAVery Low Shutdown Current: <1μA Available in 8-PIn MSOP (LTC1758-1) and 10-Pin MSOP (LTC 1758-2) Packages Improved Start Voltage AccuracyImproved PCTL Input FilteringPin Compatible with LTC1757A-X典型应用描述The LTC1758-1 is a single output RF power controller that is identical in performance to the LTC1758-2 except that one output (V PCA ) is provided. The LTC1758-1 can be used to drive a single RF 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 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.