lc75348 Sanyo Semiconductor Corporation, lc75348 Datasheet
lc75348
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lc75348 Summary of contents
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... Ordering number : ENN7308 Overview The LC75348 and LC75348M are electronic volume and tone control ICs that provide volume, balance, 2-band equalizer, input gain control, and input switching functions while requiring a minimal number of external components. Functions • Volume: 81 levels – steps) and – ...
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... Specifications Absolute Maximum Ratings 25°C, V Parameter Maximum supply voltage Maximum input voltage Allowable power dissipation Operating temperature Storage temperature Pin Assignment LC75348, 75348M = Symbol Conditions V max max All input pins IN Ta ≤ 75°C, Independent IC Pd max Ta ≤ ...
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... Total harmonic distortion THD Crosstalk CT Output noise voltage VN Maximum attenuation Vomin Current drain I DD High-level input current I IH Low-level input current I IL LC75348, 75348M = Conditions V DD CL, DI, CE CL, DI, CE CE, DI R4, LIN, RIN CL CL, DI, CE CL, DI ...
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... Equivalent Circuit 5 LOUT LBASS2 6 0.1 F 0 100Hz LBASS1 8 2700pF LTRE 9 LIN LSELO 11 LC75348, 75348M COM ROUT RBASS2 25 0 RBASS1 2700pF 23 RTRE 22 RIN 21 RSELO No. 7308 -4/21 3. 100Hz 1 F ...
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... Control System Timing and Data Format The stipulated serial data must be input to the CL, DI, and CE pins to control the LC75348 and LC75348M. The data structure has a total of 40 bits, of which 8 bits are address and 32 bits are data ...
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... LC75348, 75348M D6 D7 Operation + + + + +18 dB ...
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... LC75348, 75348M D10 D11 D12 D13 D14 D15 ...
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... Treble control D16 LC75348, 75348M D9 D10 D11 D12 D13 D14 ...
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... Zero cross signal detection block control D28 D29 Test mode D30 D31 0 0 These bits select the IC test modes and must be set to 0 during normal operation. LC75348, 75348M D22 D23 D24 Operation + + +16 dB ...
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... RBASS2 9 LIN • Volume and equalizer inputs 22 RIN 5 LOUT • Volume and equalizer outputs 26 ROUT 8 LTRE • Connections for the capacitors that form the treble band filters 23 RTRE LC75348, 75348M Function Ln Rn BASS1 Notes SELO Vref ...
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... Electronic volume control test pin. 4 TEST This pin must be tied to the V 15 • Unused (no connection) pins. These pins must be either NC left open or tied LC75348, 75348M Function voltage generator used for the analog system ( minimize power supply ripple level. SS ...
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... Internal Equivalent Circuits • Selector Block Equivalent Circuit LVref The right channel is identical. Units (Resistors LC75348, 75348M 0dB R1 2dB R2 4dB R3 6dB R4 8dB R5 10dB R6 12dB R7 14dB R8 16dB R9 18dB R10 20dB R11 22dB R12 24dB R13 26dB R14 28dB ...
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... R22 = 485 –22dB R23 = 432 –23dB R24 = 385 –24dB R25 = 343 –25dB R26 = 306 –26dB R27 = 273 –27dB 794 R81 LC75348, 75348M R28 = 243 –28dB R29 = 216 –29dB R30 = 193 –30dB R31 = 172 –31dB R32 = 153 –32dB R33 = 137 –33dB R34 = 122 – ...
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... The right channel is identical. Units (Resistors 16.240 LTRE LBASS1 For boost, switches SW1 and SW3 are on, and for cut, switches SW2 and SW4 are on. For 0 dB, the 0dBSW, SW2, and SW3 are on. LC75348, 75348M SW3 SW2 SW1 SW4 Total = 51.701 SW3 ...
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... Determine R3 from the condition LOG 1 + +20dB 10 2R3 R2 66000 G+20dB/20 2 (10 – –1 (2) Determine C from the center frequency f0 = 100 Hz condition R3R2C1C2 R3R2 2 100 66000 3700 (3) Determine Q R3R2 · = 2.1 2R3 R3R2 LC75348, 75348M 0.1 F No. 7308 -15/21 ...
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... Specifications: Set frequency 26,000 Hz Gain at maximum boost +10 dB Assume R1 = 16.240 KΩ, and R2 = 35.461 KΩ. The constants mentioned above are calculated as follows LOG – R1 G/20 10 – 35461 2 26000 – 16240 3.16 – 1 LC75348, 75348M 2 = 2700(pF) 2 No. 7308 -16/21 ...
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... IC. • Operational description of the zero cross switching circuit The LC75348 and LC75348M provide a function that can switch the zero cross comparator signal detection point, allowing applications to select an optimal detection point for the block whose data is being updated. Basically, switching noise can be minimized if the signal immediately following the block whose data is updated is input to the zero cross comparator ...
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... The LC75348 and LC75348M data format consists of 8 bits of address and 32 bits of data. When transmitting data as an even multiple of 8 bits (when transferring 36 bits of data), use the data format shown below. ...
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... LC75348, 75348M Input Gain Characteristics Setting — dB Bass Characteristics Volume Characteristics Setting — dB Treble Characteristics No. 7308 -19/21 ...
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... THD – Frequency Characteristics Frequency — Hz THD – Supply Voltage Characteristics Supply Voltage — V LC75348, 75348M THD – Input Level Characteristics Input Level — dB No. 7308 -20/21 ...
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... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of January, 2003. Specifications and information herein are subject to change without notice. LC75348, 75348M PS No. 7308 -21/21 ...