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TDA7501 数据表(PDF) 23 Page - STMicroelectronics |
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TDA7501 数据表(HTML) 23 Page - STMicroelectronics |
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23 / 29 page ![]() TDA7501 Software specification for both modes 23/29 Table 13. Mode select (subaddress 5) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 0 0 1 1 0 1 0 1 AM-IF rectifier gain 18dB 15.5dB 12dB 6dB 0 0 1 1 0 1 0 1 AM-IF rectifier corner frequency 14KHz 18.5KHz 28KHz 56KHz 0 1 backkground tuner select (internal AM- path) FM-in (MPX1) AM-in (MPX2) 0 1 Dual MPX mode on (control through Tuner- - voltage) off 0 0 1 1 0 1 0 1 forced Dual MPX mode MPX1 (allows automatic selection) MPX2 (overwrites automatic selection) MPX1+ MPX2 (overwrites automatic selection) MPX1 (overwrites automatic selection) Table 14. Configuration (subaddress 6) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 0 1 output gain 0dB +6dB 0 1 reference voltage setting for output external reference / internal reference (V33*1.25) 01 internal divider for output reference voltage connected to VCC/2 disconnected 01 fast charge (switches at CD input) open closed 01 Input level select (output power)12dB6d0 |
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