LV3327PV Electronic Volume IC Application Note http://onsemi.com Overview LV3327PV is electronic volume LSI for the volume adjustment of the portable sound equipment usage. Functions Input switching: 4 input systems (Independent control is possible.) Volume control: +10dB to -79.5dB (0.5dB steps) / –∞dB Loudness control: Taps are output starting at the –32dB position of the ladder resistor and a loudness function implemented with external capacitor and resistor components. Output gain control: 0dB or +6dB select Mixing function Output switching: 2 outputs (Each Lch output,Rch output,and Lch/Rch mixing output can be selected.) Features The mixing function is installed, and it is suitable for PND(personal navigation device)as the usage. It is possible to output it by allocating one system in the audio guidance among four input systems, and mixing other signals from the speaker output with the audio guidance by the microcomputer control. Because the volume step resolution is 0.5dB step,the volume can be made to fine-tune. The loudness function is installed. Each control is done by the serial data input. I²C Semiconductor Components Industries, LLC, 2013 February, 2013 1/16 LV3327PV Application Note Pin Arrangement DATA CLK VSS VREF ROUT IN3 IN4 RSELO RCT 9 IN2 10 VDD 11 IN1 12 TEST 13 LSELO 14 LOUT 15 LCT 16 1 2 3 4 5 6 7 8 2/16 LV3327PV Application Note Specifications Absolute Maximum Ratings at Ta=25 ºC,VSS=0V Parameter Symbol Conditions Ratings Unit VDD max VDD 6.0 V Maximum input voltage VIN max All input pins VSS-0.3 to VDD V Operating temperature Topr -40 to +85 ºC Storage temperature Tstg -50 to+125 ºC 250 mW Maximum supply voltage Ta≤85 ºC,when mounted on a Allowable power dissipation Pd max printed circuit board (114.3×76.1×1.6tmm , glass epoxy) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Allowable Operating Ranges at Ta= 25ºC,VSS=0V Parameter Supply voltage Symbol Conditions VDD VIH VDD DATA,CLK VIL TφW DATA,CLK Input pulse width Setup time Tsetup DATA,CLK Hold time Thold DATA,CLK Operating frequency fopg CLK High-level input voltage Low-level input voltage min typ 3.0 max 5.0 0.7 VDD VSS 0.6 CLK Unit 5.5 V VDD 0.2VDD V V μsec μsec 0.1 0.9 μsec 400 kHz Electrical Characteristics at Ta=25 ºC,VDD=5V,VSS=0V Parameter Symbol Conditions A loss of insertion ATT Input resistance Rin IN1/IN2/IN3/IN4 ATerr +10dB to -40dB Total harmonic distortion THD Maximum attenuation VIN= 1Vrms, f= 1kHz VIN= 1Vrms, f= 1kHz Output noise voltage VO min VN Current drain IDD Input high-level current IIH IIL Volume step setting error margin Input low-level current Maximum input voltage VCL min typ Max -1.0 -1.0 DATA,CLK, VIN =5.0V THD=1% RL=10 KΩ Volume setting : flat, f IN=1kHz dB KΩ 50 RIN=1 KΩ DATA,CLK, VIN =0V Unit +1.0 +1.0 dB 0.01 % 80 dB 5 μ Vrms 5 mA 10 μA -10 μA 1.0 Vrms 3/16 LV3327PV Application Note Data format : I²C data specification MSB MSB LSB S W MSB LSB A CHIP address MSB LSB A A ＜Explanation＞ S:Start Condition P:Stop Condition W:Write 0 (Write Mode Only) A:Ack (Acknowledge) A P DATA_N DATA_1 SUB address LSB ・・・ DATA setting CHIP address MSB CP7 LSB CP6 CP7 1 CP5 CP6 0 CP4 CP5 0 CP3 CP4 0 CP2 CP1 CP3 0 CP0 W CP2 0 CP1 1 CP0 0 SUB address MSB SU7 LSB SU6 SU5 SU4 SU3 SU2 SU1 SU0 Block SUB Address SU7 SU6 SU5 SU4 SU3 SU2 SU1 SU0 Input switching control（Lch） DATA_1 1 0 0 0 0 0 0 0 Input switching control（Rch） DATA_2 0 1 0 0 0 0 0 0 Volume control（Lch） DATA_5 1 0 1 0 0 0 0 0 Volume control（Rch） DATA_6 0 1 1 0 0 0 0 0 Loudness DATA_26 0 1 0 1 1 0 0 0 Test control DATA_29 1 0 1 1 1 0 0 0 Output switching control/ DATA_30 0 1 1 1 1 0 0 0 DATA_31 1 1 1 1 1 0 0 0 Output gain control（Lch） Output switching control/ Output gain control（Rch） 4/16 LV3327PV Application Note DATA MSB LSB D7 D6 D5 D4 D3 D2 D1 D0 Input switching control (DATA_1, DATA_2) D7 D6 D5 D4 D3 D2 D1 D0 DATA_1:Lch side 0 1 0 1 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DATA_2:Rch side INMUTE IN1 select IN2 select IN3 select IN4 select Volume control:10dB to -7.5dB (DATA_5,DATA_6） D7 D6 D5 D4 D3 D2 D1 D0 DATA_5:Lch side 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DATA_6:Rch side 10.0dB 9.5dB 9.0dB 8.5dB 8.0dB 7.5dB 7.0dB 6.5dB 6.0dB 5.5dB 5.0dB 4.5dB 4.0dB 3.5dB 3.0dB 2.5dB 2.0dB 1.5dB 1.0dB 0.5dB 0dB -0.5dB -1.0dB -1.5dB -2.0dB -2.5dB -3.0dB -3.5dB -4.0dB -4.5dB -5.0dB -5.5dB -6.0dB -6.5dB -7.0dB -7.5dB 5/16 LV3327PV Application Note Volume control: -8.0dB to -33.5dB (DATA_5,DATA_6） D7 D6 D5 D4 D3 D2 D1 D0 DATA_5:Lch side 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DATA_6:Rch side -8.0dB -8.5dB -9.0dB -9.5dB -10.0dB -10.5dB -11.0dB -11.5dB -12.0dB -12.5dB -13.0dB -13.5dB -14.0dB -14.5dB -15.0dB -15.5dB -16.0dB -16.5dB -17.0dB -17.5dB -18.0dB -18.5dB -19.0dB -19.5dB -20.0dB -20.5dB -21.0dB -21.5dB -22.0dB -22.5dB -23.0dB -23.5dB -24.0dB -24.5dB -25.0dB -25.5dB -26.0dB -26.5dB -27.0dB -27.5dB -28.0dB -28.5dB -29.0dB -29.5dB -30.0dB -30.5dB -31.0dB -31.5dB -32.0dB -32.5dB -33.0dB -33.5dB 6/16 LV3327PV Application Note Volume control: -34.0dB to -60.5dB (DATA_5,DATA_6） D7 D6 D5 D4 D3 D2 D1 D0 DATA_5:Lch side 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DATA_6:Rch side -34.0dB -34.5dB -35.0dB -35.5dB -36.0dB -36.5dB -37.0dB -37.5dB -38.0dB -38.5dB -39.0dB -39.5dB -40.0dB -40.5dB -41.0dB -41.5dB -42.0dB -42.5dB -43.0dB -43.5dB -44.0dB -44.5dB -45.0dB -45.5dB -46.0dB -46.5dB -47.0dB -47.5dB -48.0dB -48.5dB -49.0dB -49.5dB -50.0dB -50.5dB -51.0dB -51.5dB -52.0dB -52.5dB -53.0dB -53.5dB -54.0dB -54.5dB -55.0dB -55.5dB -56.0dB -56.5dB -57.0dB -57.5dB -58.0dB -58.5dB -59.0dB -59.5dB -60.0dB -60.5dB 7/16 LV3327PV Application Note Volume control: -61.0dB to -79.5dB,-∞ (DATA_5,DATA_6） D7 D6 D5 D4 D3 D2 D1 D0 DATA_5:Lch side 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 DATA_6:Rch side -61.0dB -61.5dB -62.0dB -62.5dB -63.0dB -63.5dB -64.0dB -64.5dB -65.0dB -65.5dB -66.0dB -66.5dB -67.0dB -67.5dB -68.0dB -68.5dB -69.0dB -69.5dB -70.0dB -70.5dB -71.0dB -71.5dB -72.0dB -72.5dB -73.0dB -73.5dB -74.0dB -74.5dB -75.0dB -75.5dB -76.0dB -76.5dB -77.0dB -77.5dB -78.0dB -78.5dB -79.0dB -79.5dB -∞ D3 0 0 D2 0 0 D1 0 0 D0 0 0 DATA_26 D3 0 D2 0 D1 0 D0 0 DATA_29 Setting usually for operation use Loudness control (DATA_26) D7 0 1 D6 0 0 D5 0 0 D4 0 0 Loudness：OFF Loudness：ON Test control (DATA_29) D7 0 D6 0 D5 0 D4 0 8/16 LV3327PV Application Note Output switching control/Output gain control (DATA_30,DATA_31) D7 D6 D5 D4 D3 D2 D1 D0 DATA_30:Lch side 0 1 0 1 0 0 1 1 0 0 0 0 * * * * 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DATA_31:Rch side MUTE Output selector:Lch side select Output selector:Rch side select Output selector:Lch/Rch mixing select * * * * 0 0 0 1 0 0 0 0 0 0 0 0 Output gain:0dB setting Output gain:6dB setting Pin Functions Pin Pin No. Function Notes VDD IN1 3 IN2 4 IN3 5 IN4 6 Input pins. 50kΩ LVREF RVREF VDD LSELO 2 RSELO 7 200Ω Input selector output pins. VDD Tap pins for external loudness. LCT 1 RCT 8 VDD Output pins. LOUT 16 ROUT 9 200Ω 9/16 LV3327PV Application Note Pin Pin No. Function Notes 20kΩ Connect a capacitor of a few tens of uF between VREF and Vss as a 0.5×VDD voltage generator,current ripple VREF 10 VD D 500 Ω 20kΩ countermeasure. LVREF RVREF VDD CLK 12 1kΩ Serial data clock input pin for control. VDD Serial data input pin for control. DATA 13 TEST 15 VDD 14 Power supply pin. VSS 11 Ground pin. 1kΩ TEST pin. Normally this pin is OPEN. 10/16 LV3327PV Application Note Usage Cautions (1)Request to send the initial data at power ON ・Though the circuit initializing the IC inside at power ON is incorporated, be sure to send data to all sub-address as the initial data at power ON. ・ At power ON, muting or other measures must be taken externally till the data is set. Reference data Parameter Symbol Min Typ Max Unit Conditions VDD power rise time Trise 30 - - μsec 0V→2V power rise time VDD voltage when power ON reset is canceled Vpor - 2 - V (2) Data is switched by standing up about the ACK clock of the data setting bit. (3)The auto increment function is moved in the SUB address as follows. …=>DATA_1=>DATA_2=>DATA_5=>DATA_6=>DATA_26=>DATA_29=>DATA_30=>DATA_31 =>DATA_1=>… (4) As for the mixing function , half the value in which the Lch volume output and the Rch volume output are added is output.(Lch+Rch)/2.Please set +6dB if necessary in the output steps. 11/16 LV3327PV Application Note Characteristic (1-1) Volume Block (step:+10 to 0dB) (1-2) Volume Block (step:0 to -∞dB) (2) Loudness 12/16 LV3327PV Application Note (3)Output Gain (4)Vin-THD (5)f-THD 13/16 LV3327PV Application Note Equivalent circuit LCT LSELO Lch MAIN VOLUME +10 to-79.5dB,-∞ (0.5dB_step) Lch OUTPUT GAIN 0dB,+6dB LOUT PA IN1 INMUTE ~ MUTE TEST LVREF IN2 LOGIC CIRCUIT ~ BIAS VOLTAGE CIRCUIT IN3 VDD DATA I2C INTERFACE ~ μ-CON CLK μ-CON VSS IN4 LOGIC CIRCUIT RVREF ~ VREF MUTE INMUTE Rch MAIN VOLUME +10 to -79.5dB,-∞ (0.5dB_step) Rch OUTPUT GAIN 0dB,+6dB ROUT RSELO RCT 14/16 PA LV3327PV Application Note PA PA Application Circuit 22μF 10μF 10μF μ-COM IN4 RSELO RCT 2 3 4 5 6 7 8 220pF 220pF 68kΩ 1μF 4.7kΩ 0.1μF VREF VSS IN3 1 ROUT CLK IN2 9 VDD 10 DATA 11 IN1 12 TEST 13 LSELO 14 LOUT 15 LCT 16 1μF 1μF 1μF 68kΩ 4.7kΩ 0.1μF 15/16 LV3327PV Application Note ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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