Product Summary

The LTC1957-1EMS8#TR is a dual band RF power controller for power amplifiers operating in the 850MHz to 2GHz range. The input voltage range is optimized for operation from a single lithium-ion cell or Several functions required for RF power control and protection are integrated in one small 10-pin MSOP package, thereby minimizing PCB area. The LTC1957-1EMS8#TR is a single output RF power controller that is identical in performance to the LTC1957-1EMS8#TR except that one output (VPCA) is provided. LTC1957-1EMS8#TR 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. Applications are single and dual band GSM/GPRS cellular telephones, PCS devices, wireless data modems, U.S. TDMA cellular phones.

Parametrics

LTC1957-1EMS8#TR absolute maximum ratings: (1)VIN to GND : – 0.3V to 6.5V; (2)VPCA, VPCB Voltage : – 0.3V to 3V; (3)PCTL Voltage : – 0.3V to (VIN + 0.3V); (4)RF Voltage : (VIN – 2.2V)to 7V; (5)IVCC, Continuous : 1A; (6)IVCC, 12.5% Duty Cycle : 2.5A; (7)SHDN, TXEN, BSEL Voltage to GND : – 0.3V to (VIN + 0.3V); (8)IVPCA/B, 25% Duty Cycle : 20mA; (9)Operating Temperature Range : –30℃ to 85℃; (10)Storage Temperature Range : –65℃ to 150℃; (11)Maximum Junction Temperature : 125℃; (12)Lead Temperature (Soldering, 10 sec): 300℃.

Features

LTC1957-1EMS8#TR features: (1)Dual Band RF Power Amplifier Control (LTC1957-2); (2)Internal Schottky Diode Detector with Improved Dynamic Range vs the LTC1757A; (3)Wide Input Frequency Range: 850MHz to 2GHz; (4)Autozero Loop Cancels Offset Errors and Temperature Dependent Offsets; (5)Wide VIN Range: 2.7V to 6V; (6)Allows Direct Connectioto Battery; (7)RF Output Power Set by External DAC; (8)Fast Acquire After Transmit Enable; (9)Internal Frequency Compensation; (10)Rail-to-Rail Power Control Outputs; (11)Power Control Signal Overvoltage Protection; (12)Low Operating Current: 1mA; (13)Very Low ShutdowCurrent: <1mA; (14)Available ia 8-PiMSOP Package (LTC1957-1)and 10-PiMSOP (LTC1957-2); (15)PiCompatible with the LTC1757A-X; (16)Improved Start Voltage Accuracy and Range; (17)Improved PCTL Input Filtering.

Diagrams

LTC1957-1EMS8#TR pin connection

Image Part No Mfg Description Data Sheet Download Pricing
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LTC1957-1EMS8#TR
LTC1957-1EMS8#TR


IC RF PWR CONTRLLR SINGLE 8-MSOP

Data Sheet

0-5000: $1.05
LTC1957-1EMS8#TRPBF
LTC1957-1EMS8#TRPBF


IC RF PWR CONTRLLR SINGLE 8-MSOP

Data Sheet

Negotiable