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| Multimedia ICs Audio digital key controller BU9260FS The BU9260FS is designed for key control, an essential feature for karaoke systems. *Applications stereos, radio cassette recorders, karaoke and other audio devices Mini-component *FeaturesI / O filter and mixing operational amplifier. 1) Internal 2) Internal ADC and DAC. 3) 16 k bit of internal RAM. 4) Controls serial data. *Block diagram TESTOUT 1 TEST MODE OUTPUT DAC NC 2 23 DAI 24 DAO TEST1 3 TEST MODE INPUT ADC 22 ADO CLKI 4 Clock gen. 21 ADI SCK 5 20 AMPAI - SI 6 Control SLT 7 18 AMPBI + 19 AMPAO - MT 8 + TEST MODE INPUT 17 AMPBO TEST2 9 16 AMPCI RESET Vref 10 Ref - + 15 AMPCO GND 11 RAM 14 AMPDI - VDD 12 + 13 AMPDO 1 Multimedia ICs BU9260FS *Pin descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Pin name TESTOUT N.C. TEST1 CLKI SCK SI SLT MT TEST2 Vref GND VDD AMPDO AMPDI AMPCO AMPCI AMPBO AMPBI AMPAO AMPAI ADI ADO DAI DAO Connecting the ADC capacitor Operational amplifier input / output Function Low-level test output No connected Test input (the low level is normally input) Connecting the clock resistor Serial clock input Serial data input Serial latch input Input of output control muting Test input (the low level is normally input) Analog reference voltage Ground Power supply Operational amplifier input / output Type LO -- LIP CLK LI LI LI LIP LIP VRO -- -- AO AI AO AI AO AI AO AI ADMI ADMO ADMI ADMO Operational amplifier input / output Operational amplifier input / output Connecting the DAC capacitor *Absolute maximum ratings (Ta = 25C) Parameter Applied voltage Input voltage Power dissipation Operating temperature Storage temperature Symbol VDD VIN Pd Topr Tstg Limits - 0.3 ~ + 7.0 GND - 0.3 ~ VDD + 0.3 650 - 10 ~ + 70 - 55 ~ + 125 Unit V V mW C C Reduced by 6.5mW for each increase in Ta of 1C over 25C. *Recommended operating conditions (Ta = 25C) Parameter Power supply voltage Symbol VDD Limits 4.5 ~ 5.5 Unit V 2 Multimedia ICs BU9260FS *Input / output circuits Pin types Type: Logic input and output (LI, LO and LIP - LIP has pull-down) Pins 3, 5, 6, 7, 8 and 9 (no pull-down for pins 5, 6 or 7) Pin No. = 1 20k Type: Amplifier input and output (AI and AO) Pin No. = 14,16,18,20 Pin No. = 13,15,17,19 AMP - AMPOUT AMP+ Type: ADM input and output (ADMI and ADMO) Pin No. = 21, 23 30k Pin No. = 22, 24 AMP - AMP + AMPOUT Type: Reference voltage pin (VRO) Pin No. = 10 Type: Clock pin (CLK) Pin No. = 4 5k 5k 3 Multimedia ICs BU9260FS *Electrical characteristics (unless otherwise noted, Ta = 25C, VDD = 5V, fIN = 1kHz, f + 0 mode, VIN = 100mVrms) Parameter Operating supply current Linear Input / output gain Output distortion Output noise voltage Maximum output voltage Logic Input voltage, High level Input voltage, Low level Pull-down resistance Serial data Clock width Latch width Data setup Data hold Latch setup twCK twLT tdsu th tlsu 2.0 2.0 1.0 1.0 1.0 -- -- -- -- -- -- -- -- -- -- s s s s s -- -- -- -- -- VIH VIL Rd 3.8 -- 12 -- -- 25 -- 1.2 50 V V k VIN = 5V -- -- GV THD No VMax. -3 -- -- 0.7 0 1.3 - 80 1.5 +3 3.0 - 65 -- dB % dBV Vrms 30kHz - LPF DIN - Audio THD = 10%, LPF gain = 1 -- Symbol IDD Min. -- Typ. 7 Max. 14 Unit mA No signal Conditions *Application example 1 2 3 18k 4 Serial clock Serial data Serial latch Mute 5 6 Control 7 8 9 10 47 11 RAM 12 14 TEST INPUT Ref Clock gen. TEST INPUT ADC 21 20 TEST OUTPUT DAC 23 22 0.01 18k 47k 18k 18 33k 1 Input 150p 19 0.1 47k 22k 16 33k 2700p 50k 2700p 24 0.01 + - - 150p 17 + - 270p 15 22k 39k 820p + - 50k 270p 39k 820p + 13 Output 1 Fig. 1 4 Multimedia ICs BU9260FS *Operation notes (1) Operating mode 1) Serial data mode Function: Setting the key according to SCK, SI and SLT 1. Serial data The signal value is input with the rise of SCK. Input data are latched with the fall of SLT. However, data are canceled unless D6 = high and D7 = low. SI D0 D1 D2 D3 D4 D5 D6 D7 SCK SLT 2. Serial timing For standard values, refer to "Electrical Characteristics." twCK SCK twCK tdsu th tlsu SI SLT twLT 5 Multimedia ICs 3. Serial data Key setting +8 +7 +6 +5 +4 +3 +2 +1 0 -1 -2 -3 -4 -5 -6 -7 -8 D4 H H H H H H H H H L L L L L L L L D3 H L L L L L L L L H H H H H H H H D2 L H H H H L L L L H H H H L L L L D1 L H H L L H H L L H H L L H H L L D0 L H L H L H L H L H L H L H L H L BU9260FS D5 L H Output mute control Output is not muted. When MT = high, output is forcibly muted. Output is muted. D6 H D7 L Data latch control Data is latched with the rise of SLT. Data is not latched, even with the rise of SLT. Other than above (2) Output mute Output can be forcibly muted according to MT. MT L H Output mute control Output is not muted. However, output is muted when muting is activated by the serial data. Output is muted. 6 Multimedia ICs BU9260FS *External dimensions (Units: mm) 10.0 0.2 24 7.8 0.3 5.4 0.2 13 1 1.8 0.1 12 0.11 0.8 0.36 0.1 0.3Min. 0.15 SSOP-A24 0.15 0.1 7 |
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