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SA58641 Datasheet(PDF) 4 Page - NXP Semiconductors |
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SA58641 Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 17 page Philips Semiconductors Objective data SA58641 High performance mixer FM IF system with high-speed RSSI 2004 Dec 16 4 AC ELECTRICAL CHARACTERISTICS Tamb = 25 °C; VCC = +5 V, unless otherwise stated. RF frequency = 240.05 MHz + 14.5 dBV RF input step-up; IF frequency = 10.7 MHz; RF level = –45 dBm; FM modulation = 1 kHz with ±125 kHz peak deviation. Audio output with C-message weighted filter and de-emphasis capacitor. Test circuit Figure 1. The parameters listed below are tested using automatic test equipment to assure consistent electrical characteristics. The limits do not represent the ultimate performance limits of the device. Use of an optimized RF layout will improve many of the listed parameters. SYMBOL PARAMETER TEST CONDITIONS LIMITS UNITS SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Mixer/Osc section (ext LO = 160mVRMS) fIN Input signal frequency 500 MHz fOSC External oscillator (buffer) 500 MHz Noise figure at 240 MHz 12 dB Third-order input intercept point Matched f1=240.05 MHz; f2=240.35 MHz –16 dBm Conversion power gain Matched 14.5 dBV step-up 8 11 dB RF input resistance Single-ended input 700 Ω RF input capacitance 3.5 pF Mixer output resistance (Pin 20) 330 Ω IF section IF amp gain 330 Ω load 38 dB Limiter gain 330 Ω load 54 dB Input limiting –3dB Test at Pin 18 –105 dBm AM rejection 80% AM 1 kHz 50 dB Data level RLOAD = 100 kΩ 120 130 mVRMS 3 dB data bandwidth 600 700 kHz SINAD sensitivity RF level = –111 dBm 16 dB THD Total harmonic distortion –43 –38 dB S/N Signal-to-noise ratio No modulation for noise 60 dB IF level = –90 dBm 0.6 1.0 V IF RSSI output with buffer IF level = –45 dBm 0.2 1.2 1.8 V IF level = –10 dBm 0.8 1.6 2.3 V IF RSSI output rise time IF frequency = 10.7 MHz (10kHz pulse, no 10.7MHz filter) RF level = –56 dBm 1.2 µs (no RSSI bypass capacitor) RF level = –28 dBm 1.1 µs IF RSSI output fall time IF frequency = 10.7 MHz (10 kHz pulse, no 10.7 MHz filter) RF level = –56 dBm 2.0 µs (no RSSI bypass capacitor) RF level = –28 dBm 7.3 µs RSSI range 70 dB RSSI accuracy ±2.0 dB IF input impedance 330 Ω IF output impedance 330 Ω Limiter input impedance 330 Ω Limiter output impedance 300 Ω Limiter output level with no load 130 mVRMS RF/IF section (int LO) System RSSI output RF level = –10 dBm 1.4 V System SINAD RF level = –95 dBm 12 dB |
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