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SA604 Datasheet(PDF) 4 Page - NXP Semiconductors |
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SA604 Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 13 page Philips Semiconductors Product specification SA604A High performance 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 SA604A UNITS MIN TYP MAX Input limiting -3dB Test at Pin 16 -92 dBm/50 Ω AM rejection 80% AM 1kHz 30 34 dB Recovered audio level 15nF de-emphasis 80 175 260 mVRMS Recovered audio level 150pF de-emphasis 530 mVRMS THD Total harmonic distortion -34 -42 dB S/N Signal-to-noise ratio No modulation for noise 73 dB RF level = -118dBm 0 160 650 mV RSSI output1 RF level = -68dBm 1.9 2.65 3.1 V RF level = -18dBm 4.0 4.85 5.6 V RSSI range R4 = 100k (Pin 5) 90 dB RSSI accuracy R4 = 100k (Pin 5) ±1.5 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. SA604 data sheets refer to power at 50 Ω input termination; about 21dB less power actually enters the internal 1.5k input. SA604 (50) SA604A (1.5k)/SA605 (1.5k -97dBm -118dBm -47dBm -68dBm +3dBm -18dBm The SA605 and SA604A are both derived from the same basic die. The SA605 performance plots are directly applicable to the SA604A. |
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