InsideShowcase (Volume 25) is available in HTML and PDF format. - 395KBVideo solutions for PC platforms Fastest low power, 10-bit, 1.25-MSPS serial ADC GPLynx simplifies 1394 implementation Single-chip, 900 MHz RF downcoverter 900-MHz RF transmit driver extends system performance 350-mW low-voltage audio amplifiers First 2-W stereo audio amplifier sytems with depop circuitry Highest-bandwidth low-voltage rail-to-rail CMOS op amp High-speed wide supply voltage op amp TCM38C17 QCombo Quad-Channel PCM Codec/Filter Combo |
900-MHz RF transmit driver extends system performanceProduct Features
 The TRF8011 RF transmit driver amplifier extends the performance and integration of RF systems. Designed specifically as a driver amplifier for GSM and AMPS/NADC applications, the highly integrated device is excellent for other wireless applications in the 900-MHz ISM range, including pagers and modems. The TRF8011 can also be used as the final output stage for some 900-MHz cordless phones. The TRF8011 integrates a two-stage amplifier with ramp capability for burst control in Time Division Multiple Access (TDMA) applications. Functionally, the device amplifies the RF signal from the preceding modulator and upconverter stages in the RF section of a transmitter to a level sufficient to drive a final power output device. In addition, it provides important benefits such as single bias supply and transmit enable/disable control. The TRF8011 can be enabled or disabled via a logic input. Also, a power control signal applied to the VPC input ramps the RF output power up or down to meet ramp and spurious emissions specifications in TDMA systems. This signal causes a linear change in output power as the voltage applied to VPC varies between 0 and 3 V. The device uses a BiCMOS process and operates from a 4.8-V bias supply. Typical output power is 26 dBm, and small gain is typically 27 dB. The TRF8011 is available in a small, surface mount, thermally enhanced TSSOP 20-pin PowerPAD™ package.
Vol 26 February, 1998 |
