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SA614AD Datasheet(PDF) 4 Page - NXP Semiconductors |
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SA614AD Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 14 page Philips Semiconductors Product specification SA614A Low power FM IF system 1997 Nov 07 4 AC ELECTRICAL CHARACTERISTICS Typical reading at TA = 25°C; VCC = +6V, unless otherwise stated. IF frequency = 455kHz; IF level = -47dBm; FM modulation = 1kHz with +8kHz peak deviation. Audio output with C-message weighted filter and de-emphasis capacitor. Test circuit Figure 3. The parameters listed below are tested using automatic test equipment to assure consistent electrical characterristics. 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. LIMITS SYMBOL PARAMETER TEST CONDITIONS SA614A UNITS MIN TYP MAX Input limiting -3dB Test at Pin 16 -92 dBm/50 Ω AM rejection 80% AM 1kHz 25 33 dB Recovered audio level 15nF de-emphasis 60 175 260 mVRMS Recovered audio level 150pF de-emphasis 530 mVRMS THD Total harmonic distortion -30 -42 dB S/N Signal-to-noise ratio No modulation for noise 68 dB RF level = -118dBm 0 160 800 mV RSSI output1 RF level = -68dBm 1.7 2.50 3.3 V RF level = -18dBm 3.6 4.80 5.8 V RSSI range R4 = 100k (Pin 5) 80 dB RSSI accuracy R4 = 100k (Pin 5) +2.0 dB IF input impedance 1.4 1.6 k Ω IF output impedance 0.85 1.0 k Ω Limiter input impedance 1.4 1.6 k Ω Unmuted audio output resistance 58 k Ω Muted audio output resistance 58 k Ω NOTE: 1. SA614A data sheets refer to power at 50 Ω input termination; about 21dB less power actually enters the internal 1.5k input. SA614A (50) SA614A (1.5k)/SA615 (1.5k) -97dBm -118dBm -47dBm -68dBm +3dBm -18dBm The SA615 and SA614A are both derived from the same basic die. The SA615 performance plots are directly applicable to the SA614A. |
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