Test Procedure for the LV3327PMGEVB Evaluation Board Test Items *Step check Volume, Output gain *Characteristic Loudness, Output noise voltage, THD, Maximum input voltage, Input selector, Output selector Aug/2011 1 www.onsemi.com Test Setup 1 Power Supply Oscilloscope Audio analyzer PC USB I/F Board Signal Generator Equipment : Power Supply … 1pc Oscilloscope … 1pc Signal Generator … 1pc Audio analyzer … 1pc PC … 1pc USB I/F Board … 1pc LV3327PV Evaluation_Board … 1pc Aug/2011 Fig 1 2 www.onsemi.com Step check1 : Volume Please apply an electric power supply:5V. Input signal : VIN=-10dB,f=1kHz→IN1 Setting from PC ・ Set Input selector in IN1. Each setting level:FLAT. ・ Output Selector select.→Selector(Lch)=Lch, Selector(Rch)=Rch ・ Transmit Volume data. Confirm an output waveform. Check the waveform in OSC. Confirm the step level in Audio Analyzer. About the following waveforms. Setting of Volume: Waveform of 10dB/5dB/0dB/-5dB 1ms/div,1V/div 1ms/div,1V/div 1ms/div,1V/div 1ms/div,1V/div ROUT LOUT Volume:10dB Aug/2011 Volume:5dB Volume:0dB 3 Volume:-5dB www.onsemi.com Step check2 : Output gain Please apply an electric power supply:5V. Input signal : VIN=-10dB,f=1kHz→IN1 Setting from PC ・ Set Input selector in IN1. Each setting level:FLAT. ・ Output Selector select.→Selector(Lch)=Lch, Selector(Rch)=Rch ・ Volume 0dB set ・ Transmit Output gain data. Confirm an output waveform. Check the waveform in OSC. Confirm the step level in Audio Analyzer. About the following waveforms. Setting of Output gain: Waveform of 0dB/6dB 1ms/div,1V/div 1ms/div,1V/div ROUT LOUT Output gain:0dB Aug/2011 Output gain:6dB 4 www.onsemi.com Characteristic1 : Loudness Set up (Refer to Fig1) Please apply an electric power supply:5V. Input signal level : VIN=0dB→IN1 Setting from PC ・Set Input selector in IN1. Each setting level:FLAT. ・Transmit Volume data -32dB and Loudness control ON. ・Confirm output level : input frequency 100Hz/1kHz/10kHz. Check the waveform in OSC. Confirm the output level in Audio Analyzer. About the following waveforms. Condition : Loudness ON/OFF, input frequency 100Hz/1kHz/10kHz. 2ms/div,0.1V/div 2ms/div,0.1V/div 2ms/div,0.1V/div RFOUT Loudness ON LFOUT RFOUT Loudness OFF LFOUT f=100Hz Aug/2011 f=1kHz 5 f=10kHz www.onsemi.com Test Setup 2 Power Supply Oscilloscope Audio analyzer PC USB I/F Board Fig 2 Aug/2011 6 www.onsemi.com Characteristic6 : Output noise voltage Set up (Refer to Fig2) Please apply an electric power supply:5V. Input pin is all GND. Setting from PC ・Set Input selector in IN1. Each setting level:FLAT Confirm the output level in Audio Analyzer.→noise level check Characteristic7 : THD Set up (Refer to Fig1) Please apply an electric power supply:5V. Input signal : VIN=0dB,f=1kHz→IN1 Setting from PC ・Set Input selector in IN1. Each setting level:FLAT. Confirm the output level in Audio Analyzer.→THD Characteristic8 : Maximum input voltage Set up (Refer to Fig1) Please apply an electric power supply:5V. Input frequency: 1kHz→IN1 Setting from PC ・Set Input selector in IN1. Each setting level:FLAT. The output level adjust VIN to become level of THD=1 %. Confirm level of VIN in Audio Analyzer .→Maximum input voltage Aug/2011 7 www.onsemi.com Characteristic9 : Input selector Please apply an electric power supply:5V. Connect Signal Generator to “input sel” which wants to input a signal (input signal :VIN=0dB,f=1kHz). Other “input sel” ,OPEN. Setting from PC ・Selector “input sel” set. Each of other setting level : FLAT. ・Check the waveform in OSC. →Confirm the output waveform of FLAT. ・Choose “input sel” which does not enter of the signal . →Confirm the output waveform of no signal. In the case of set up (Refer to Fig1) , IN1:signal input, other “input sel”: OPEN . Aug/2011 8 www.onsemi.com