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