Maker : ATMEL Corporation
Part No. : T0905

  Datasheet PDF : T0905.pdf
  Cross Reference : T0905 Cross Reference
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Shortcut : T090  T0905 

Product Information

www.DataSheet4U.com Features • • • • • • 35 dBm Output Power in CW Mode High Power Added Efficiency (PAE) Single Supply Operation (No Negative Rail) Simple Analog Power Ramp Control Low Current Consumption in Power-down Mode (Typically ≤15 µA) Small SMD Package (PSSOP28 with Heat Slug) Applications • • • • Professional Phones Hands-free Sets ISM Band Application Wireless Infrastructure Preamplifiers Description The T0905 is a monolithic integrated power amplifier IC manufactured with Atmel’s Silicon-Germanium (SiGe) process. Due to its open architecture, the device can be used either as a two or three-stage amplifier. Every stage can be matched individually, thus allowing applications in a wide frequency range. The T0905 can be used from 135 MHz up to 600 MHz in both linear and non-linear (saturated) mode. The power gain can be set dynamically by means of an analog control input optionally for each single stage or for the entire power amplifier. Constant gain mode is also possible. The T0905 is suited for CW mode up to 35 dBm. These features, including wide power ramp control, make the T0905 a very flexible power amplifier for many different applications. DataSheet4U.com Apart from telephone applications, the T0905 can also be used for car identification systems and several other wireless communication systems. The single supply voltage operation at +3.5 V and a negligible leakage current in power-down mode enable a remarkable simplification of the application’s power management. Figure 1. Block Diagram VCTL1 Generalpurpose VHF/UHF Power Amplifier (135 to 600 MHz) T0905 Preliminary DataShee GAIN1 16 VCTL2 GAIN2 VCTL3 GAIN3 15 Buf3 13 14 Buf2 17 18 19 VBIAS3 11 BGOUT VCTL VCC_CTL 12 10 BG Buf1 9 8 20 VBIAS2 VB2_DC VB3_DC RFOUT/VCC3 7 RFIN1 21 GND3 Match RF1 Match RF2 Match RF3 22-25 6 5 4 3 28 27 VB3 26 GND3 GND1 VCC1 GND2 VCC2 RFIN2 Rev. 4751D–SIGE–05/04 DataSheet4U.com DataSheet 4 U .com www.DataSheet4U.com Pin Configuration Figure 2. Pinning PSSOP28 NC GND2 GND2 RFin2 VCC1 GND1 RFIN1 VB2_DC VBIAS2 VCC_CTL BGOUT VCTL VCTL1 VCTL2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC2 VB3 GND3 RFOUT/VCC3 RFOUT/VCC3 RFOUT/VCC3 RFOUT/VCC3 GND3 VB3_DC VBIAS3 GAIN3 GAIN2 GAIN1 VCTL3 Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Symbol NC GND2 GND2 RFIN2 VCC1 GND1 RFIN1 VB2_DC VBIAS2 VCC_CTL BGOUT VCTL VCTL1 VCTL2 VCTL3 GAIN1 GAIN2 GAIN3 VBIAS3 VB3_DC GND3 RFOUT/VCC3 RFOUT/VCC3 RFOUT/VCC3 Function Not connected Ground Ground et4U.com DataSheet4U.com RF input (2-stage operation) Supply voltage, first stage Ground RF input (3-stage operation) Input for gain setting, second stage Output Buf2 Supply voltage control block Output band gap Control voltage input Control voltage input, first stage Control voltage input, second stage Control voltage input, third stage Gain setting Buf1 Gain setting Buf2 Gain setting Buf3 Output Buf3 Input for gain setting, third stage Ground RF output/supply voltage, third stage RF output/supply voltage, third stage RF output/supply voltage, third stage DataShee DataSheet4U.com 2 T0905 [Preliminary] 4751D–SIGE–05/04 DataSheet 4 U .com www.DataSheet4U.com T0905 [Preliminary] Pin Description (Continued) Pin 25 26 27 28 Symbol RFOUT/VCC3 GND3 VB3 VCC2 Function RF output/supply voltage, third stage Ground Pin to extend the input capacity of stage 3 Supply voltage second stage Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameters Supply voltage VCC, no RF Input power Gain control voltage (1) Symbol VCC1, V...

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