LTC1957-2是Linear公司的一款功率放大器控制器产品，LTC1957-2是Single/Dual Band RF Power Controllers with 40dB Dynamic Range，本站介绍了LTC1957-2的封装应用图解、特点和优点、功能等，并给出了与LTC1957-2相关的凌力尔特元器件型号供参考。
LTC1957-2 - Single/Dual Band RF Power Controllers with 40dB Dynamic Range
LTC1957-1 - Single/Dual Band RF Power Controllers with 40dB Dynamic Range - Linear Technology（凌力尔特）
The LTC1957-1 is a single output RF power controller that is identical in performance to the LTC1957-2 except that one output (VPCA) is provided. The LTC1957-1 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.
| 器件型号 | 封装 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) |
|---|---|---|---|---|
| LTC1957-1EMS8 | MS-8 | E | $1.95 | $1.65 |
| LTC1957-1EMS8#PBF | MS-8 | E | $1.95 | $1.65 |
| LTC1957-1EMS8#TR | MS-8 | E | $1.70 | |
| LTC1957-1EMS8#TRPBF | MS-8 | E | $1.70 | |
| LTC1957-2EMS | MS-10 | E | $2.03 | $1.70 |
| LTC1957-2EMS#PBF | MS-10 | E | $2.03 | $1.70 |
| LTC1957-2EMS#TR | MS-10 | E | $1.75 | |
| LTC1957-2EMS#TRPBF | MS-10 | E | $1.75 |
