TRF8010 900-MHz RF TRANSMIT DRIVER

SLWS031B - JULY 1996- REVISED MAY 1997

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features

Operates from 3.6-V and 4.8-V Power Supplies for AMPS/NADC and GSM Applications Respectively
Unconditionally Stable
Wide UHF Frequency Range 800 MHz to 1000 MHz
21 dBm and 23 dBm Typical Output Power in AMPS/NADC and GSM Applications Respectively
Linear Ramp Control
Transmit Enable/Disable Control
Advanced BiCMOS Processing Technology for Low-Power Consumption, High Efficiency, and Highly Linear Operation
Minimum of External Components Required for Operation
Surface-Mount Thermally Enhanced Package for Extremely Small Circuit Footprint

description

The TRF8010 is an RF transmit driver amplifier for 900-MHz digital, analog, and dual-mode communication applications. It consists of a two-stage amplifier and a linear ramp controller for burst control in TDMA (time division multiple access) applications. Very few external components are required for operation.

The TRF8010 amplifies the RF signal from the preceding modulator and upconverter stages in an RF section of a transmitter to a level that is sufficient to drive a final RF power output device. The output impedance of RFOUT is approximately 50 . But, since RFOUT is connected to an open-collector output device, minimal external matching is required.

The device is enabled when the TXEN input is held high. A power control signal applied to the VPC input can ramp the RF output power up or down to meet ramp and spurious emission specifications in TDMA systems. The power control signal causes a linear change in output power as the voltage applied to VPC varies between 0 V and 3 V. With the RF input power applied to RFIN at 0 dBm and TXEN high, adjusting VPC from 0 V to 3 V increases the output power from a typical value of -54 dBm at VPC = 0 V to the output power appropriate for the application:

21 dBm typical for AMPS/NADC (Advanced Mobile Phone Service/North American Digital Cellular) operation
23 dBm typical for GSM (Global System for Mobile Communications) operation

Forward isolation with the RF input power applied to RFIN at 0 dBm, VPC = 0 V, and TXEN high is typically greater than 50 dB.

The TRF8010 is available in a small, surface-mount, thermally enhanced TSSOP 20-pin PWP (

PowerPAD^TM) package and is characterized for operation from -40°C to 85°C. The PWP package has a solderable pad that can improve the package thermal performance by bonding the pad to an external thermal plane. The pad also acts as a low-inductance electrical path to ground and, for the TRF8010, must be electrically connected to the PCB ground plane as a continuation of the regular package terminals that are designated GND.

Title: 900-MHZ RF TRANSMIT DRIVER
Product Family: RF FOR PERSONAL COMMUNICATIONS
Device Functionality: OPERATES FROM 3.6 V OR 4.8 V POWER SUPPLIES FOR AMPS/NADC AND GSM APPLICATIONS RESPECTIVELY
Orderable Devices: TRF8010IPWP, TRF8010PWP

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View more information about generic part numbers:TRF8010

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