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TA0022 Datasheet

Part Number TA0022
Manufacturers RF Micro Devices
Logo RF Micro Devices
Description Low Cost HBT Upconverters
Datasheet TA0022 DatasheetTA0022 Datasheet (PDF)

 TA0022 TA0022 RF9938: Low-Cost HBT Upconverters for CDMA Transmitter ICs       To support the increasing demand for Code Division Multiple Access (CDMA), the latest digital communication technology in cellular industry, RF Micro Devices (RFMD) developed CDMA chip sets for both receiver and transmit chain. The CDMA chip sets were designed and manufactured on an advanced GaAs Heterojunction Bipolar Transistor (HBT) process from TRW. The HBT proc.

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Part Number TA0028
Manufacturers RF Micro Devices
Logo RF Micro Devices
Description Silicon Transceiver
Datasheet TA0022 DatasheetTA0028 Datasheet (PDF)

 TA0028 TA0028 RF2905/2915/2925: Silicon Transceiver Family for Low-Power Wireless Communications             A family of low-power RF transceivers has been developed for wireless data communications devices operating in the European 433MHz to 869MHz ISM bands or the U.S. 902MHz to 928MHz ISM band. All three IC's have been implemented in a 15GHz silicon bipolar process technology that allows low-power FSK/ASK transceiver opera.

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Part Number TA0027
Manufacturers RF Micro Devices
Logo RF Micro Devices
Description 10dB Attenuator
Datasheet TA0022 DatasheetTA0027 Datasheet (PDF)

TA0027  TA0027 RF2421: Integrated, Single-Step, 10dB Attenuator for Power Control Applications                S2 RB RF IN RA RA = RO(N+1)/(N-1) RB = RO(N2-1)/2N Where: N = VIN / VOUT RO = Impedance Wireless communication is continuing to expand into all areas of the business, government, and consumer sectors. New markets are opening around the world for products that will meet specialized requirements. To build such produ.

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Low Cost HBT Upconverters

 TA0022 TA0022 RF9938: Low-Cost HBT Upconverters for CDMA Transmitter ICs       To support the increasing demand for Code Division Multiple Access (CDMA), the latest digital communication technology in cellular industry, RF Micro Devices (RFMD) developed CDMA chip sets for both receiver and transmit chain. The CDMA chip sets were designed and manufactured on an advanced GaAs Heterojunction Bipolar Transistor (HBT) process from TRW. The HBT process offers several advantages over other processes such as high Ft, low noise transistors, and process consistency. The CDMA program is two-fold. The first chip set, which was designed for cellular band, consists of a receive and a transmit IF AGC amps (RF9907 and RF9909), a receive LNA/ mixer (RF9906), and a transmit upconverter (RF9908). The second chip set, designed for PCS band, consists of a receive LNA/mixer (RF9936) and a transmit upconverter (RF9938). This article describes the two transmit upconverters for this CDMA program. Design architecture is the same for both cellular and PCS designs. The PCS upconverter, RF9938, is a modified RF9908 with performance optimized for the PCS band. Both ICs operate at 3.6VDC with 0dB conversion gain. With -10dBm input at the IC, typical Adjacent Channel Power Rejection (ACPR) for the RF9908 is -37dB for the 880kHz offset and -58dB for the 1.98MHz offset. The typical ACPR for the RF9938 is -43dB. The nominal power supply current for the RF99.


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