The MC13851 is a cost-effective, high IP3 low-noice amplifier (LNA) with low noise figure. This is the leadless package version of the MC13821 device. An integrated bypass switch is included to preserve high input intercept performance in variable signal strength environments and boosts dynamic range. On-chip bias circuitry offers low system cost. The input and output match are external to allow maximum design flexibility. An external resistor is used to set device current which allows balancing required linearity with low current consumption. Gain is optimized for applications >1000 MHz. The MC13851 is fabricated with Freescale's advanced RF BiCMOS process using the eSiGe:C module and is available in the 2x2 mm MLPD-8 leadless package, offering a small, low-height, easy-to-solder solution for applications with tight printed circuit board placement requirements.
Features
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The MC13851 is intended for applications from 1000 to 2500 MHz and the MC13852 is for applications <1000 MHz
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Gain: 18.7 dB (typ) at 1960 MHz and 17.7 dB (typ) at 2140 MHz
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Output third order intercept point (OIP3): 16 dBm at 1960 MHz and 17 dBm (typ) dBm at 2140 MHz
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Noise figure (NF): 1.37 dB (typ) at 1960 MHz and 1.46 dB at 2140 MHz
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Output 1 dB compression point (P1dB): 8 dBm (typ) at 1960 MHz and 8 dBm (typ) at 2140 MHz
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Freescale IP3 Boost Circuitry
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Bypass mode has return losses comparable to active mode for use in systems with filters and duplexers
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Bypass mode improves dynamic range in variable signal strength environments
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Integrated logic-controlled standby mode with current drain < 1 µA
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Total supply current variable from 2.5–5 mA using an external bias resistor.
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In a receiver system with 20% active mode and 80% bypass mode the average current drain is < 0.6 mA
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On-chip bias sets the bias point
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Bias stabilized for device and temperature variations
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MLPD-8 leadless package with low parasitics
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1575, 1960, 2140 and 2400 MHz application circuit evaluation boards with characterization data are available
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Available in tape and reel packaging
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Global Positioning System (GPS)
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Cellular Front end LNA, 2 Way Radios
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Security Systems
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Buffer Amplifiers
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Mixers
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Intermediate Frequency (IF) Amplifiers
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Voltage Controlled Oscillators (VCOs)
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Low Current Drain
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Transceivers Requiring External LNAs
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