YD7000 YOUDA INTEGRATED CIRCUIT POWER AMPLIFIER FOR HEADPHONE STEREOS—YD7000 DESCRIPTION The YD7000 is a low power audio amplifier integrated circuit for headphone. It provides differential speaker outputs to maximize output swing at low supply voltages. FEATURES *Low current consumption. *16Ω load drive capability. *Excellent reduced voltage characteristics. *Excellent power supply ripple rejection. *Minimum number of external pares required (no input capacitor, feedback capacitor required). *Applicable to radio sets because of high voltage gain. *Less harmonic interference in radio band. *On-chip power switch function, muting function. BLOCK DIAGRAM MUTE SWITCH 10 OUT1 9 POWER GND 8 OUT2 7 MUTE CIRCUIT Vcc 6 BIAS Amp1 Amp2 POWER SWITCH 1 2 3 4 5 POWER SWITCH IN1 PRE GND IN2 REF WuXi YouDa Electronics Co., Ltd Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China Tel: 86-510-85205117 86-510-85205106 Fax: 86-510-85205110 Website: www.e-youda.com SHENZHEN OFFICE Tel： 86-755-83740369 Fax： 86-755-83741418 Ver 5.0 1 of 4 2006-06-28 YD7000 YOUDA INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Tamb=25℃) PARAMETER SYMBOL VALUE UNIT Supply Voltage Vcc 4.5 V Allowable Power Dissipation PD 300 mW Operating Temperature Topr -20～+75 ℃ Storage Temperature Tstg -40～+125 ℃ RECOMMENDED OPERATING CONDITIONS (Tamb=25℃) PARAMETER SYMBOL VALUE UNIT Supply Voltage Vcc 3.0 V Operating Voltage Range Vcc 1.6～4.0 V Recommended Load Resistance RL 16～32 Ω ELECTRICAL CHARACTERISTICS (Tamb=25℃, RL=16Ω, Rg=600Ω, See specified Test Circuit.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Icco(1) Vcc=2.4V, quiescent 5.4 10 mA Icco(2) Vcc=4.5V, pin10→GND 1.1 2.0 mA Icco(3) Vcc=4.5V, pin1→GND 1.0 μA Gv(1) Vcc=2.4V, f=1kHz, Vo=-10dBm 30 32 34 dB Gv(2) Vcc=1.6V, f=1kHz, Vo=-20dBm 29 32 34 dB ΔGv(1) Vcc=2.4V, f=1kHz, Vo=-10dBm 1.0 dB ΔGv(2) Vcc=1.6V, f=1kHz, Vo=-20dBm 1.0 dB Total Harmonic Distortion THD Vcc=2.0V, f=1kHz,Po=1mW 1.5 % Output Power Po Vcc=3.0V, f=1kHz, THD=10% Quiescent Current Voltage Gain Voltage Gain Difference WuXi YouDa Electronics Co., Ltd 2 of 4 0.5 20 40 mW Website: www.e-youda.com YD7000 YOUDA INTEGRATED CIRCUIT PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Crosstalk CT Vcc=2.4V, f=100Hz, Rg=1KΩ Vo=-10dB 40 50 dB Ripple Rejection SVRR Vcc=1.6V, f=100Hz, Rg=1 KΩ VR=-20dBm, BPF=100Hz 45 60 dB Output Noise Voltage VNO Vcc=4.5V, Rg=1 KΩ BPF=20Hz～20kHz Power OFF Effect VO(off) Muting Effect 100 μV Vcc=1.6V, f=100Hz, pin1→GND, VIN=-10dB -80 dB VO(MT) Vcc=1.6V, f=100Hz, pin10→GND, VIN=-10dB -80 dB Power ON Current Sensitivity I1(on) Vcc=1.5V, V5≧0.85V 1.0 μA Power OFF Voltage Sensitivity V1(off) Vcc=1.5V, V5≦0.1V Muting OFF Current Sensitivity I10(off) Vcc=1.5V,V5≧0.85V Muting ON Voltage Sensitivity V10(on) Vcc=1.5V, V5≦0.1V 62 0.05 0.5 0.6 0.2 0.5 0.65 V 1.0 μA V APPLICATION CIRCUIT . p m A . r p O Amp. /Mute Opr. St-by 10 1 Vin1 W 9 2 Amp1 + Mute Stand-by 0.1μ Vin2 8 3 + W 4.7Ω 4.7Ω 0.1μ 7 4 Amp2 220μ + 220μ Vcc 22μ + 6 5 Bias 0.1μ 100μ WuXi YouDa Electronics Co., Ltd 3 of 4 Website: www.e-youda.com YD7000 YOUDA INTEGRATED CIRCUIT OUTLINE DRAWING WuXi YouDa Electronics Co., Ltd 4 of 4 Website: www.e-youda.com