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RF3857 Datasheet(PDF) 3 Page - RF Micro Devices |
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RF3857 Datasheet(HTML) 3 Page - RF Micro Devices |
3 / 11 page 3 of 11 RF3857 DS110616 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Parameter Specification Unit Condition Min. Typ. Max. WiMAX Low Noise Amplifier, cont. Noise Figure 1.2 1.7 2.0 dB Over full temp range, frequency range, and pro- cess. IIP3 9 dBm Total Current Drain (per channel) 8.5 10 mA Total current drain includes ICC+IREF. VCC=3.3V, VREF=3.3V, Gain select<1.8V. BYPASS MODE Gain Select>1.8V, VREF=0V Gain -3 dB Note: Bypass mode insertion loss will degrade gradually as VCC goes below 2.7V. Input IP3 20 dBm Total Current Drain (per channel) 2 mA Total current drain includes ICC+IREF Power Supply Voltage (VCC) 1.8 3.0 5.0 V See bias note VSELECT Low 0.8 V High Gain mode. Gain Select<0.8V, VREF=3.3V VSELECT High 1.8 V Low Gain mode. Gain Select>1.8V, VREF=0V Power Down per RX Path 0 10 AGain Select<0.8V, VREF=0V, VCC=3.3V (Over full temp range, frequency, and beta) VREF1 or VREF 2 Turn On/Off 100 <150 nSec For faster turn on and off time C1 and C2 should be changed from 22nF to a value between 10pF to 100pF Gain Select 1 or 2 Turn On/Off 100 <150 nSec For faster turn on and off time C1 and C2 should be changed from 22nF to a value between 3.0pF to 100pF Bias note: Due to the presence of ESD protection circuitry on the RF3857, the maximum allowable collector bias voltage (pin 4) is 4.0V. Higher supply voltages such as 5V are permissible if a series resistor is used to drop VCC to <4.0V for a given ICC. |
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