|Category||Analog & Mixed-Signal Processing|
|Description||Bass Boost ic|
|Company||Sanyo Semiconductor Corporation|
|Datasheet||Download LA2650 datasheet
The is a bass boost IC developed for use in minicomponent stereo systems, TV sets, and radio/cassette player products. The cutoff frequency is determined by external capacitors, and the boost gain, addition level, and boost on/off state can be controlled by a microcontroller.
Left and right channel boost addition on/off Bass output pin for use in 3D systems Boost on/off LED on/off 8-bit serial microprocessor interfaceFeatures
The bass boost gain is variable over a maximum range in 5-dB steps, and the addition level into the left and right channels can be controlled over 35 dB range in 3-dB and 5-dB steps. This allows an optimal boost for the source and volume to be acquired using microprocessor control. Includes two AGC circuits on chip: a level limiter (2 V rms) for the maximum input in low-frequency boost mode and a non-clipping limiter (i.e. clip prevention) circuit. Can be switched between 2D and 3D systems.
Variable boost gain 25, 30, and 35 dB) Boost level limiter, non-clipping limiter Variable boost addition level and 35 dB)Specifications
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Ta 70°C Conditions Ratings to +150 Unit mW °C
Parameter Recommended supply voltage Operating voltage range Symbol VCC op Conditions Ratings to 10 Unit VParameter Low-level voltage High-level voltage Symbol VIL VIH Conditions Ratings to *5.5 Unit V
Note: When VCC is under 5.7 V, the maximum value shall be VCC 0.2 V.
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Parameter Symbol ICCOT ICCOB VGT Voltage gain VGB BST1 BST2 Boost level: high BST4 BST1 Boost level: low BST2 BST3 Maximum output voltage VO maxT Boost: off Boost: on VIN = 0 dBm, Boost: off VIN = 0 dBm, Boost: on Boost: on, = 50 Hz, BST = 35 dB, ADD = 0 dB, VIN = 30 dBm Boost: on, = 50 Hz, BST = 35 dB, ADD = 0 dB, VIN = 20 dBm Boost: on, = 50 Hz, BST = 35 dB, ADD = 0 dB, VIN = 10 dBm Boost: on, = 50 Hz, BST = 35 dB, ADD = 0 dB, VIN = 0 dBm Boost: on, = 50 Hz, BST = 30 dB, ADD = 6 dB, VIN = 20 dBm Boost: on, = 50 Hz, BST = 30 dB, ADD = 6 dB, VIN = 10 dBm Boost: on, = 50 Hz, BST = 30 dB, ADD = 6 dB, VIN = 0 dBm THD = 1%, Boost: off Conditions Ratings min typ max Unit mA dB dBm mA
VO maxB THD = 1%, Boost: on THD T VIN = 10 dBm, Boost: off, BPF to 30 kHz VIN = 10 dBm, Boost: on, = 50 Hz, LPF = 30 kHz = 0 dB, 10 k, DIN AUDIO, Boost: off = 0 dB, 10 k, DIN AUDIO, Boost: 10 k, JIS A, Boost: off, Boost ADD = off 10 k, JIS A, Boost: on RED LEDTotal harmonic distortion THD CT T Crosstalk CT B VNO T Output noise voltage VNO B LED current ILED
Parameter Quiescent current ICCOT Boost: on ICCOB Boost: off Voltage gain VIN = 0 dBm VG T Boost: off VG B Boost: on Boost level: high Boost level: low Maximum output voltage Boost: on, = 50 Hz, BST = 35 dB, ADD 0 dB Boost: on, = 50 Hz, BST = 30 dB, ADD 6 dB THD 1% VO maxT Boost: off VO maxB Boost: on Total harmonic distortion VIN = 10 dBm THD T Boost: off, BPF to 30 kHz THD B Boost: on, = 50 Hz, LPF = 30 kHz Crosstalk = 0 dBm, 10 k, DIN AUDIO CT T Boost: off CT B Boost: on Output noise voltage 10 k, JIS A VNO T Boost: off, Boost ADD = off VNO B Boost: on LED current ILED RED LED H * *=don't care Conditions D7 D8
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