PDF FM1246 Data sheet ( Hoja de datos )

Número de pieza	FM1246
Descripción	Desktop video & FM radio module system CCIR I
Fabricantes	NXP Semiconductors
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No Preview Available ! TUNERS DATA SHEET FM1246 Desktop video & FM radio module system CCIR I Preliminary speciﬁcation File under Tuners, DC03 1997 May 14 1 page Philips Components Desktop video & FM radio module system CCIR I Preliminary speciﬁcation FM1246 LIMITING VALUES Limiting values under operational conditions The tuner can be guaranteed to function properly under the following conditions. SYMBOL PARAMETER PIN MIN. TYP. MAX. UNIT VS supply voltage 4.75 5.00 5.25 V VS(ripple) peak-to-peak ripple voltage susceptibility (at 5 V ±5%); note 1 20 Hz to 100 kHz 12 − − 5 mV >100 kHz to 500 kHz − − 10 mV IS(tuner) supply current − − 120 mA VSCL SCL bus input voltage 13 −0.3 − +5.25 V VSDA ISDA SDA bus input voltage SDA bus current (open collector) −0.3 − 14 −1 − +5.25 V +5 mA VAS address select voltage; note 2 15 − − +5.25 V VAFright(FM) FM right channel DC voltage − 1.0 − V ZAFright(FM) FM right channel load impedance parallel connected: 20 resistive value − 50 − kΩ capacitive value − 9 − pF VAFleft(FM) FM left channel DC voltage − 1.0 − V ZAFleft(FM) FM left channel load impedance: resistive value 21 − 50 − kΩ capacitive value − 9 − pF ZIF 2nd IF sound output load impedance 22 0.5 − − kΩ ZCVBS tL Composite Video Baseband Signal load impedance CVBS load time constant − 23 − 75 − Ω − 100 ns VS(IF) IS(IF) IF supply voltage IF supply current 4.75 5.0 24 −− 5.25 V 150 mA ZAF AF sound output load impedance parallel connected: resistive value 25 5.0 − − kΩ capacitive value − − 4 nF Notes 1. Sinusoidal ripple voltage superimposed on the 5 V supply voltage in the frequency range of 20 Hz to 500 kHz. Criteria for TV interference >57 dB. 2. For detailed information about the address decoding, refer to Chapter “Application information”. 1997 May 14 5 5 Page Philips Components Desktop video & FM radio module system CCIR I Preliminary speciﬁcation FM1246 SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT FM radio characteristics α26 limiting sensitivity for (S+N)/N α50 S/N ratio: mono at f = 22.5 kHz mono at f = 75 kHz stereo αi(FM) FM image rejection effective selectivity S300 frequency response: lower −3 dB point upper −3 dB point AM suppression FM AF output level at terminal 20/21 (RMS value): mono stereo stereo separation THD total harmonic distortion: stereo at 1 kHz during overmodulation at f = ±100 kHz test signal C1 − 7 30 test signal C3 − 30 40 test signal C1 55 58 − 65 68 − test signal C3 55 63 − test signal C1 53 65 − test signal C1 + C2 50 − − test signal C3; −3 dB points − 20 40 14 18 − test signal C1 38 − − dBµV dBµV dB dB dB dB dB Hz kHz dB test signal C1 test signal C3 test signal C3; 1 kHz test signal C3 40 57 74 120 175 230 28 35 − − 0.8 1.5 − 1.5 3 mV mV dB % % Note 1. All the pins of the desktop video tuner are protected against electrostatic discharge (ESD) up to 2 kV. The product is classified in category B (‘‘MIL-STD-883C”). 1997 May 14 11 11 Page

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