rf3145 RF Micro Devices, rf3145 Datasheet
rf3145
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rf3145 Summary of contents
Page 1
... Functional Block Diagram Product Description The RF3145 is a high power, high efficiency power amplifier module with integrated power control. This module is self-contained with 50Ω input and output terminals. The device is manufactured on an advance Gallium Arsenide Heterojunction Bipo- lar Transistor (HBT) process, and has been designed for use as the final dual-mode ...
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... RF3145 Absolute Maximum Ratings Parameter Supply Voltage Power Control Voltage (V ) RAMP Band Select TX Enable RF - Input Power Max Duty Cycle Output Load VSWR Operating Case Temperature Storage Temperature Parameter Min. GSM US 850MHz Band Operating Frequency Range 824 Maximum Output Power +34.5 Total Efficiency (PAE) ...
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... RF3145 Condition Max P , Voltage supplied to the input OUT Minimum P , Voltage supplied to the input. OUT V =0.2V to 1.6V RAMP DC to 2MHz V =1.6V RAMP V =0V to 1.6V RAMP Temp=+25 °C, V =3.5V, BandSelect=Low =High MODE ...
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... RF3145 Parameter Min. GSM US 900MHz Band Operating Frequency Range 880 Maximum Output Power +34.5 Total Efficiency (PAE) 45 Input Power for Max Output +2 Folding Conversion Gain Output Noise Power Forward Isolation Second Harmonic Third Harmonic All other Non-Harmonic Spurious Cross Band Coupling 2F 0 Input Impedance ...
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... RF3145 Condition Temp=+25 °C, V =3.5V, CC BandSelect=Low, V =High, MODE =+4dBm RAMP,MAX IN RAMP Freq=880MHz to 915MHz, 25% Duty Cycle, Pulse Width=1154μs Temp=-20°C to +85°C, V =3. =3.5V OUT,MAX CC Temp=-20°C to +85°C Temp=-20° ...
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... RF3145 Parameter Min. Overall (DCS/PCS Mode) GMSK Mode Operating Frequency Range 1710 Maximum Output Power +32 31.5 Total Efficiency (PAE) 43 Recommended Input Power Range +2 Folding Conversion Gain Output Noise Power (DCS) Output Noise Power (PCS) Forward Isolation Second Harmonic Third Harmonic All other Non-Harmonic Spurious ...
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... RF3145 Condition Temp=25°C, V =3.5V, BandSelect=High, CC Freq=1710MHz to 1785MHz, P =+4dBm 25% Duty Cycle, RAMP RAMP,MAX Pulse Width=1154μs Temp=25°C, V =3.5V, CC Freq=1710MHz to 1785MHz RAMP RAMP,MAX Temp=-20°C to +85°C, V =3.2V ...
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... RF3145 Parameter Min. 1850MHz to 1910MHz 8PSK Mode Operating Frequency Range 1850 Output Power to Meet EVM and 27.5 ACPR Spectrum 25.5 Total Efficiency (PAE) Gain 32.50 Gain Temperature Coefficient EVM ACPR and Spectrum Mask Output Noise Power (PCS) Forward Isolation Second Harmonic Third Harmonic All other Non-Harmonic Spurious ...
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... RF output for the DCS/PCS band. This is a 50Ω output. The output load line matching is contained internal to the package. OUT 12 NC Not connected. Pkg GND Base 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Rev A4 DS050919 Interface Schematic input depending on the baseband RAMP RF3145 ...
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... RF3145 1 PIN #1 DCS/PCS IN BAND SELECT TX EN VBATT VMODE VRAMP GSM IN 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com Package Drawing 10.00±0.10 10.00±0.10 9.600 TYP 8.800 TYP 8.72 5 6.15 8.200 TYP 7.400 TYP 5 6 .10 6.800 TYP 0 5 ...
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... Rev A4 DS050919 Application Schematic kΩ** Evaluation Board Schematic P2 GND P2-1 1 VCC CON1 kΩ** 7 8 RF3145 50 Ω μstrip 11 DCS/PCS OUT 10 50 Ω μstrip 9 GSM OUT 50 Ω μstrip *** 11 DCS/PCS OUT 10 50 Ω μstrip *** 9 GSM OUT ...
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... Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com Dual Mode Operation V RAMP Ramp from 0.2V to 1.6V (GSM Burst Ramp Signal) FIXED RF3145 Power Amplifier TX ENABLE V RAMP H( ENABLE Power On Sequence V settles at 0.2 V 1us before TX_Enable goes low ...
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... Overview The RF3145 is a dual-mode, quad-band power amplifier module that is compatible with both GSM and EDGE applications. The device operates in a broad frequency range that includes the GSM850, GSM900, DCS1800, and PCS1900 frequency bands. Integrated band select, mode select, and power control features are also integrated to provide digital control of various fea- tures ...
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... The indirect closed loop is essentially a closed loop method of power control that is invisible to the user. Most power control systems in GSM sense either forward power or collector/drain current. The RF3145 does not use a power detector. A high- speed control loop is incorporated to regulate the collector voltages of the amplifier while the stages are held at a constant bias ...
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... BAT BAT Where P is the output power from the PA power. The RF3145 improves the effective efficiency by minimizing the P 0.4dB to 0.5dB loss to the transit path. To demonstrate the improvement in effective efficiency consider the following exam- ple: Conventional PA Solution LOSS V BAT ...
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... An often overlooked problem in PA control loops is that a delay not only decreases loop stability, it also affects the burst timing (for instance, when the input power from the V burst timing then appears to shift to the right, especially at low power levels. The RF3145 is insensitive to a change in input power and the burst timing is constant and requires no software compensation. ...
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... Through the rectification pro- cess, there is additional squaring of the waveform resulting in higher harmonics. The RF3145 addresses this by eliminating the need for the detector diode. Therefore, the harmonics coming out of the PA should represent the maximum power of the har- monics throughout the transmit chain ...
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... RF3145 PCB Surface Finish The PCB surface finish used for RFMD's qualification process is electroless nickel, immersion gold. Typical thickness is 3μinch to 8μinch gold over 180μinch nickel. PCB Land Pattern Recommendation PCB land patterns are based on IPC-SM-782 standards when possible. The pad pattern shown has been developed and tested for optimized assembly at RFMD ...